Bio

Bio


Professor Cappelli is the author of over 100 papers in these areas. He is currently a member of the Editorial Board of Diamond Films and Technology. He is also secretary of the Electric Propulsion Technical Committee of the American Institute for Aeronautics and Astronautics.

Academic Appointments


Professional Education


  • PhD, University of Toronto, Aerospace Science and Engineering (1987)

Teaching

Publications

All Publications


  • FURTHER INVESTIGATIONS OF AN OPEN DRIFT HALL THRUSTER WITH BORON NITRIDE AND DIAMOND WALL Gascon, N., Thomas, C., Hermann, W., Cappelli, M., A.
  • Energetic neutral particle production in the cathode sheath of direct-current discharges Ito, T., Cappelli, M. A.
  • A Kinetic Study of Electron-Wall Collisions in a Hall Thruster Meezan, N. B., Cappelli, M. A.
  • Waveguiding and bending modes in a plasma photonic crystal bandgap device AIP ADVANCES Wang, B., Cappelli, M. A. 2016; 6 (6)

    View details for DOI 10.1063/1.4954668

    View details for Web of Science ID 000379041400015

  • Radial magnetic compression in the expelled jet of a plasma deflagration accelerator APPLIED PHYSICS LETTERS Loebner, K. T., Underwood, T. C., Mouratidis, T., Cappelli, M. A. 2016; 108 (9)

    View details for DOI 10.1063/1.4943370

    View details for Web of Science ID 000375329200065

  • A zero-equation turbulence model for two-dimensional hybrid Hall thruster simulations PHYSICS OF PLASMAS Cappelli, M. A., Young, C. V., Cha, E., Fernandez, E. 2015; 22 (11)

    View details for DOI 10.1063/1.4935891

    View details for Web of Science ID 000366054900095

  • Evidence of Branching Phenomena in Current-Driven Ionization Waves PHYSICAL REVIEW LETTERS Loebner, K. T., Underwood, T. C., Cappelli, M. A. 2015; 115 (17)
  • Excited state population dynamics of a xenon ac discharge PLASMA SOURCES SCIENCE & TECHNOLOGY Fabris, A. L., Young, C. V., Cappelli, M. A. 2015; 24 (5)
  • Numerical studies of nitric oxide formation in nanosecond-pulsed discharge-stabilized flames of premixed methane/air PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES Bak, M. S., Cappelli, M. A. 2015; 373 (2048)

    Abstract

    A simulation is developed to investigate the kinetics of nitric oxide (NO) formation in premixed methane/air combustion stabilized by nanosecond-pulsed discharges. The simulation consists of two connected parts. The first part calculates the kinetics within the discharge while considering both plasma/combustion reactions and species diffusion, advection and thermal conduction to the surrounding flow. The second part calculates the kinetics of the overall flow after mixing the discharge flow with the surrounding flow to account for the effect that the discharge has on the overall kinetics. The simulation reveals that the discharge produces a significant amount of atomic oxygen (O) as a result of the high discharge temperature and dissociative quenching of excited state nitrogen by molecular oxygen. This atomic oxygen subsequently produces hydroxyl (OH) radicals. The fractions of these O and OH then undergo Zel'dovich reactions and are found to contribute to as much as 73% of the total NO that is produced. The post-discharge simulation shows that the NO survives within the flow once produced.

    View details for DOI 10.1098/rsta.2014.0331

    View details for Web of Science ID 000357900400002

    View details for PubMedID 26170428

  • Self-organization in planar magnetron microdischarge plasmas APPLIED PHYSICS LETTERS Ito, T., Young, C. V., Cappelli, M. A. 2015; 106 (25)

    View details for DOI 10.1063/1.4922898

    View details for Web of Science ID 000357036600045

  • Successive laser ablation ignition of premixed methane/air mixtures OPTICS EXPRESS Bak, M. S., Cappelli, M. A. 2015; 23 (11): A419-A427

    Abstract

    Laser ablation has been used to study successive ignition in premixed methane/air mixtures under conditions in which the flow speed leads to flame blow-out. A range of laser pulse frequencies is experimentally mimicked by varying the time interval between two closely spaced laser pulses. Emission intensities from the laser ablation kernels are measured to qualitatively estimate laser energy coupling, and flame CH* chemiluminescence is recorded in a time-resolved manner to capture the flame evolution and propagation. A comparison of the measurements is made between the two successive breakdown ignition events. It is found that the formation of the subsequent ablation kernel is almost independent of the previous one, however, for the successive breakdowns, the first breakdown and its ensuing combustion created temporal regions of no energy coupling as they heat the gas and lower the density. Flame imaging shows that the second ablation event successfully produces another flame kernel and is capable of holding the flame-base even at pulse intervals where the second laser pulse cannot form a breakdown. This study demonstrates that successive ablation ignition can allow for the use of higher laser frequencies and enhanced flame stabilization than successive breakdown ignition.

    View details for DOI 10.1364/OE.23.00A419

    View details for Web of Science ID 000356902400002

    View details for PubMedID 26072866

  • A fast rise-rate, adjustable-mass-bit gas puff valve for energetic pulsed plasma experiments REVIEW OF SCIENTIFIC INSTRUMENTS Loebner, K. T., Underwood, T. C., Cappelli, M. A. 2015; 86 (6)

    View details for DOI 10.1063/1.4922522

    View details for Web of Science ID 000357690300014

  • A fast rise-rate, adjustable-mass-bit gas puff valve for energetic pulsed plasma experiments. Review of scientific instruments Loebner, K. T., Underwood, T. C., Cappelli, M. A. 2015; 86 (6): 063503-?

    Abstract

    A fast rise-rate, variable mass-bit gas puff valve based on the diamagnetic repulsion principle was designed, built, and experimentally characterized. The ability to hold the pressure rise-rate nearly constant while varying the total overall mass bit was achieved via a movable mechanical restrictor that is accessible while the valve is assembled and pressurized. The rise-rates and mass-bits were measured via piezoelectric pressure transducers for plenum pressures between 10 and 40 psig and restrictor positions of 0.02-1.33 cm from the bottom of the linear restrictor travel. The mass-bits were found to vary linearly with the restrictor position at a given plenum pressure, while rise-rates varied linearly with plenum pressure but exhibited low variation over the range of possible restrictor positions. The ability to change the operating regime of a pulsed coaxial plasma deflagration accelerator by means of altering the valve parameters is demonstrated.

    View details for DOI 10.1063/1.4922522

    View details for PubMedID 26133835

  • A Reduced Set of Air Plasma Reactions for Nanosecond Pulsed Plasmas IEEE TRANSACTIONS ON PLASMA SCIENCE Bak, M. S., Cappelli, M. A. 2015; 43 (4): 995-1001
  • Nanosecond-Pulsed Discharge Plasma Splitting of Carbon Dioxide IEEE TRANSACTIONS ON PLASMA SCIENCE Bak, M. S., Im, S., Cappelli, M. 2015; 43 (4): 1002-1007
  • Ion dynamics in an E x B Hall plasma accelerator APPLIED PHYSICS LETTERS Young, C. V., Fabris, A. L., Cappelli, M. A. 2015; 106 (4)

    View details for DOI 10.1063/1.4907283

    View details for Web of Science ID 000348996200080

  • Ion Velocimetry Measurements and Particle-In-Cell Simulation of a Cylindrical Cusped Plasma Accelerator IEEE TRANSACTIONS ON PLASMA SCIENCE Fabris, A. L., Young, C. V., Manente, M., Pavarin, D., Cappelli, M. A. 2015; 43 (1): 54-63
  • Implementation of an Entropy Closure Model for 2-D Hybrid Hall Thruster Simulations IEEE TRANSACTIONS ON PLASMA SCIENCE Cha, E., Cappelli, M. A., Fernandez, E. 2015; 43 (1): 5-11
  • A 2-D Hybrid Hall Thruster Simulation That Resolves the E x B Electron Drift Direction IEEE TRANSACTIONS ON PLASMA SCIENCE Lam, C. M., Fernandez, E., Cappelli, M. A. 2015; 43 (1): 86-94
  • High-Velocity Neutral Plasma Jet Formed by Dense Plasma Deflagration IEEE TRANSACTIONS ON PLASMA SCIENCE Loebner, K. T., Wang, B. C., Poehlmann, F. R., Watanabe, Y., Cappelli, M. A. 2014; 42 (10): 2500-2501
  • Successive laser-induced breakdowns in atmospheric pressure air and premixed ethane-air mixtures COMBUSTION AND FLAME Bak, M. S., Im, S., Cappelli, M. A. 2014; 161 (7): 1744-1751
  • Time-synchronized continuous wave laser-induced fluorescence axial velocity measurements in a diverging cusped field thruster JOURNAL OF PHYSICS D-APPLIED PHYSICS MacDonald, N. A., Cappelli, M. A., Hargus, W. A. 2014; 47 (11)
  • Experiments and simulations of an atmospheric pressure lossy dielectric barrier Townsend discharge JOURNAL OF PHYSICS D-APPLIED PHYSICS Im, S., Bak, M. S., Hwang, N., Cappelli, M. A. 2014; 47 (8)
  • Plasma Actuator Control of a Lifted Ethane Turbulent Jet Diffusion Flame IEEE TRANSACTIONS ON PLASMA SCIENCE Im, S., Bak, M. S., Mungal, M. G., Cappelli, M. A. 2013; 41 (12): 3293-3298
  • Induced Flow and Optical Emission Generated by a Pulsed 13.56 MHz-5 kHz Plasma Actuator IEEE TRANSACTIONS ON PLASMA SCIENCE Dedrick, J., Im, S., Cappelli, M., Boswell, R. W., Charles, C. 2013; 41 (12): 3275-3278
  • Dielectric Barrier Discharge-Induced Vortex Generation With Discharge-Actuated Boundary Layer Bleed IEEE TRANSACTIONS ON PLASMA SCIENCE Im, S., Bak, M. S., Mungal, M. G., Cappelli, M. A. 2013; 41 (12): 3245-3253
  • Studies on the stability limit extension of premixed and jet diffusion flames of methane, ethane, and propane using nanosecond repetitive pulsed discharge plasmas COMBUSTION AND FLAME Bak, M. S., Im, S., Mungal, M. G., Cappelli, M. A. 2013; 160 (11): 2396-2403
  • A study of flow induced by laser induced breakdown-enhanced dielectric barrier discharges in air APPLIED PHYSICS LETTERS Im, S., Bak, M. S., Cappelli, M. A. 2013; 103 (16)

    View details for DOI 10.1063/1.4825373

    View details for Web of Science ID 000326148700101

  • Surface discharge plasma actuator driven by a pulsed 13.56 MHz-5 kHz voltage waveform JOURNAL OF PHYSICS D-APPLIED PHYSICS Dedrick, J., Im, S., Cappelli, M. A., Boswell, R. W., Charles, C. 2013; 46 (40)
  • A Thomson-type mass and energy spectrometer for characterizing ion energy distributions in a coaxial plasma gun operating in a gas-puff mode PHYSICS OF PLASMAS Rieker, G. B., Poehlmann, F. R., Cappelli, M. A. 2013; 20 (7)

    View details for DOI 10.1063/1.4816028

    View details for Web of Science ID 000322535400063

  • Simulations of nanosecond-pulsed dielectric barrier discharges in atmospheric pressure air JOURNAL OF APPLIED PHYSICS Bak, M. S., Cappelli, M. A. 2013; 113 (11)

    View details for DOI 10.1063/1.4795269

    View details for Web of Science ID 000316545200011

  • Surface discharge plasma actuator driven by a pulsed 13.56 MHz–5 kHz voltage waveform Journal of Physics D: Applied Physics Dedrick, J., Im, S., Cappelli, M. A., Boswell, R. W., Charles, C. 2013; 46 (40): 405201
  • Dielectric Barrier Discharge-Induced Vortex Generation With Discharge-Actuated Boundary Layer Bleed Plasma Science, IEEE Transactions on Im, S., Bak, M. S., Mungal, M., G., Cappelli, M., A. 2013; 41 (12): 3245 - 3253

    View details for DOI 10.1109/TPS.2013.2278027

  • Plasma Actuator Control of a Lifted Ethane Turbulent Jet Diffusion Flame Plasma Science, IEEE Transactions on Im, S. K., Bak, M. S., Mungal, M. G., Cappelli, M. A. 2013; 41 (12): 3293 - 3298

    View details for DOI 10.1109/TPS.2013.2277722

  • The manipulation of an unstarting supersonic flow by plasma actuator JOURNAL OF PHYSICS D-APPLIED PHYSICS Im, S., Do, H., Cappelli, M. A. 2012; 45 (48)
  • Optically pumped cesium plasma neutralization of space charge in photon-enhanced thermionic energy converters APPLIED PHYSICS LETTERS Ito, T., Cappelli, M. A. 2012; 101 (21)

    View details for DOI 10.1063/1.4767349

    View details for Web of Science ID 000311477600075

  • Time-synchronized continuous wave laser-induced fluorescence on an oscillatory xenon discharge REVIEW OF SCIENTIFIC INSTRUMENTS MacDonald, N. A., Cappelli, M. A., Hargus, W. A. 2012; 83 (11)

    Abstract

    A novel approach to time-synchronizing laser-induced fluorescence measurements to an oscillating current in a 60 Hz xenon discharge lamp using a continuous wave laser is presented. A sample-hold circuit is implemented to separate out signals at different phases along a current cycle, and is followed by a lock-in amplifier to pull out the resulting time-synchronized fluorescence trace from the large background signal. The time evolution of lower state population is derived from the changes in intensity of the fluorescence excitation line shape resulting from laser-induced fluorescence measurements of the 6s(')[1/2](1)(0)-6p(')[3/2](2) xenon atomic transition at ? = 834.68 nm. Results show that the lower state population oscillates at twice the frequency of the discharge current, 120 Hz.

    View details for DOI 10.1063/1.4766958

    View details for Web of Science ID 000312034400018

    View details for PubMedID 23206061

  • Plasma-assisted stabilization of laminar premixed methane/air flames around the lean flammability limit COMBUSTION AND FLAME Bak, M. S., Do, H., Mungal, M. G., Cappelli, M. A. 2012; 159 (10): 3128-3137
  • Dielectric barrier discharge induced boundary layer suction APPLIED PHYSICS LETTERS Im, S., Cappelli, M. A. 2012; 100 (26)

    View details for DOI 10.1063/1.4731288

    View details for Web of Science ID 000305831500108

  • Ion velocity and plasma potential measurements of a cylindrical cusped field thruster JOURNAL OF APPLIED PHYSICS MacDonald, N. A., Young, C. V., Cappelli, M. A., Hargus, W. A. 2012; 111 (9)

    View details for DOI 10.1063/1.4707953

    View details for Web of Science ID 000304109900016

  • Nanoparticle production in arc generated fireballs of granular silicon powder AIP ADVANCES Ito, T., Cappelli, M. A. 2012; 2 (1)

    View details for DOI 10.1063/1.3681283

    View details for Web of Science ID 000302225400044

  • Nanosecond repetitively pulsed discharge control of premixed lean methane-air combustion Bak, M. S., Cappelli, M. A. 2012
  • Experimental Study and Plasma Control of an Unstarting Supersonic Flow 6th AIAA Flow Control Conference Im, S., Do, H., Mungal, M. G., Cappelli, M. A. 2012

    View details for DOI 10.2514/6.2012-2809

  • Characteristics of low frequency air glow dielectric barrier discharges at atmospheric pressure Hwang, N., Im, S., Bak, M. S., Cappelli, M. A. 2012
  • A Simulation of the Effects of Varying Repetition Rate and Pulse Width of Nanosecond Discharges on Premixed Lean Methane-Air Combustion Journal of Combustion Bak, M. S., Cappelli, M. A. 2012; 2012: 11

    View details for DOI 10.1155/2012/137653

  • Experimental Study of Plasma Control of an Unstarting Supersonic Flow 6th AIAA Flow Control Conference Im, S., Do, H., Cappelli, M. A. 2012

    View details for DOI 10.2514/6.2012-2809

  • Electric Field Measurements in Gases Using Cavity Enhanced Polarimetry 50th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition Rath, J., Franka, I., Lee, B., Hagen, C., Yalin, A., Cappelli, M. A. 2012

    View details for DOI 10.2514/6.2012-988

  • Cross-Field Transport of Electrons in Hall Plasma Accelerators Cappelli, M. A. 2012
  • Laser-induced breakdown stabilization of non-premixed jet diffusion flames Bulletin of the American Physical Society Bak, M. S., Cappelli, M. A. 2012; 57 (8)
  • Separation Control Using Dielectric Barrier Discharge-Induced Suction and Vortex Generation 6TH AIAA FLOW CONTROL CONFERENCE Bak, M. S., Mungal, M. G., Cappelli, M. A. 2012

    View details for DOI 10.2514/6.2012-2947

  • The Structure of Nanosecond Repetitively Pulsed Spark Discharges in Air IEEE TRANSACTIONS ON PLASMA SCIENCE Pai, D. Z., Cappelli, M. A., Laux, C. O. 2011; 39 (11): 2258-2259
  • The influence of boundary layers on supersonic inlet flow unstart induced by mass injection EXPERIMENTS IN FLUIDS Do, H., Im, S., Mungal, M. G., Cappelli, M. A. 2011; 51 (3): 679-691
  • Laser-induced fluorescence velocity measurements of a diverging cusped-field thruster JOURNAL OF PHYSICS D-APPLIED PHYSICS MacDonald, N. A., Cappelli, M. A., Gildea, S. R., Martinez-Sanchez, M., Hargus, W. A. 2011; 44 (29)
  • Visualizing supersonic inlet duct unstart using planar laser Rayleigh scattering EXPERIMENTS IN FLUIDS Do, H., Im, S., Mungal, M. G., Cappelli, M. A. 2011; 50 (6): 1651-1657
  • On the quenching of excited electronic states of molecular nitrogen in nanosecond pulsed discharges in atmospheric pressure air APPLIED PHYSICS LETTERS Bak, M. S., Kim, W., Cappelli, M. A. 2011; 98 (1)

    View details for DOI 10.1063/1.3535986

    View details for Web of Science ID 000286009800014

  • Laser-Induced Fluorescence Velocity Measurements of a Diverging Cusped Field Thruster Journal of Physics D: Applied Physics MacDonald, N. A., Cappelli, M. A., Gildea, S. R., Martínez-Sánchez, M., Hargus, W. A. 2011; 44 (29)
  • The Influence of Boundary Layers on Supersonic Inlet Unstart 17th AIAA International Space Planes and Hypersonic Systems and Technologies Conference Do, H., Im, S., Mungal, M. G., Cappelli, M. A. 2011

    View details for DOI 10.2514/6.2011-2349

  • Unstart of a Supersonic Model Inlet/Isolator Flow Induced by Mass Injection 49th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition Do, H., Im, S., Mungal, M. G., Cappelli, M. A. 2011

    View details for DOI 10.2514/6.2011-68

  • Quenching of Excited Electronic States of Molecular Nitrogen in Nanosecond Pulsed Discharges in Atmospheric Pressure Air 49th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition Bak, M., Kim, W., Cappelli, M. A. 2011

    View details for DOI 10.2514/6.2011-1150

  • Experimental Study of Supersonic Inlet Flow Unstart Induced by Mass Injection Bulletin of the American Physical Society Do, H., Im, S., Mungal, M. G., Cappelli, M. A. 2011
  • Experimental and Computational Investigation of Mass Injection Induced Unstart 29th AIAA Applied Aerodynamics Conference Fike, J., Duraisamy, K., Alonso, J., Do, H., Im, S., Cappelli, M. A. 2011

    View details for DOI 10.2514/6.2011-3192

  • Quenching of electronically excited states of molecular nitrogen in nanosecond repetitive pulsed discharges in atmospheric pressure air Bulletin of the American Physical Society Bak, M. S., Cappelli, M. A. 2011; 56 (15)
  • Plasma Control of an Unstarting Supersonic Flow 17th AIAA International Space Planes and Hypersonic Systems and Technologies Conference Im, S., Do, H., Cappelli, M. A. 2011

    View details for DOI 10.2514/6.2011-2360

  • Laminar lean premixed methane/air combustion near the lean flammability limit using nanosecond repetitive pulsed discharge plasmas Bulletin of the American Physical Society Bak, M. S., Do, H., Mungal, M. G., Cappelli, M. A. 2011
  • SUPERSONIC INLET DUCT UNSTART INDUCED BY FUEL JET INJECTION 7th International Symposium on Turbulence and Shear Flow Phenomena Do, H., Im, S., Mungal, M. G., Cappelli, M. A. 2011
  • Advanced Plasma Propulsion PRINCETON UNIV NJ Choueiri, E., Cappelli, M. A., Martinez-Sanchez, M., Hallock, A., Gildea, S., Matlock, T. 2011: 145
  • Plasma Control of a Turbulent Boundary Layer in an Unstarting Supersonic Flow 49th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition Im, S., Do, H., Cappelli, M. 2011

    View details for DOI 10.2514/6.2011-1143

  • Advanced Plasma Propulsion DTIC Document Choueiri, E., Cappelli, M. A., Martinez-Sanchez, M. M., Hallock, A., Gildea, S., Matlock, T. 2011
  • Plasma assisted flame ignition of supersonic flows over a flat wall COMBUSTION AND FLAME Do, H., Im, S., Cappelli, M. A., Mungal, M. G. 2010; 157 (12): 2298-2305
  • Current distribution measurements inside an electromagnetic plasma gun operated in a gas-puff mode PHYSICS OF PLASMAS Poehlmann, F. R., Cappelli, M. A., Rieker, G. B. 2010; 17 (12)

    View details for DOI 10.1063/1.3526603

    View details for Web of Science ID 000285770500069

  • Plasma assisted cavity flame ignition in supersonic flows COMBUSTION AND FLAME Do, H., Cappelli, M. A., Mungal, M. G. 2010; 157 (9): 1783-1794
  • On the role of fluctuations, cathode placement, and collisions on the transport of electrons in the near-field of Hall thrusters PHYSICS OF PLASMAS Smith, A. W., Cappelli, M. A. 2010; 17 (9)

    View details for DOI 10.1063/1.3479827

    View details for Web of Science ID 000282439300032

  • Dielectric barrier discharge control of a turbulent boundary layer in a supersonic flow APPLIED PHYSICS LETTERS Im, S., Do, H., Cappelli, M. A. 2010; 97 (4)

    View details for DOI 10.1063/1.3473820

    View details for Web of Science ID 000281059200020

  • Single particle simulations of electron transport in the near-field of Hall thrusters JOURNAL OF PHYSICS D-APPLIED PHYSICS Smith, A. W., Cappelli, M. A. 2010; 43 (4)
  • The role of in situ reforming in plasma enhanced ultra lean premixed methane/air flames COMBUSTION AND FLAME Kim, W., Mungal, M. G., Cappelli, M. A. 2010; 157 (2): 374-383
  • Ion Velocity Distribution in a Low-Power Cylindrical Hall Thruster 46TH AIAA/ASME/SAE/ASEE JOINT PROPULSION CONFERENCE & EXHIBIT MacDonald, N. A., Cappelli, M. A., Hargus Jr, W. A. 2010

    View details for DOI 10.2514/6.2010-7103

  • Plasma-Assisted Flame Holding in Subsonic and Supersonic Flows 48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition Kim, W., Do, H., Cappelli, M. A., Mungal, M. G. 2010

    View details for DOI 10.2514/6.2010-263

  • Plasma Assisted Flame Holding in Subsonic and Supersonic Flows 48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition Kim, W., Do, H., Cappelli, M., Mungal, M. 2010

    View details for DOI 10.2514/6.2010-263

  • Structure of laboratory ball lightning PHYSICAL REVIEW E Ito, T., Tamura, T., Cappelli, M. A., Hamaguchi, S. 2009; 80 (6)

    Abstract

    Trajectories of self-sustained laboratory ball lightning, generated by arc discharges with silicon, are investigated for understanding the possibility of buoyant flight. Extremely low apparent densities are found, nearly approaching that of standard air. The freely buoyant balls are observed to survive for about 0.1 s, with significantly buoyant balls surviving for several seconds. These ball lightning objects are found to have a density and size that can easily allow them to be carried by a gentle breeze of a few meters per second. The results are interpreted by a model that is an extension of that first proposed by Abrahamson and Dinniss [J. Abrahamson and J. Dinniss, Nature (London) 403, 519 (2000)]. The buoyant behavior of ball lightning seen in our experiments is believed to arise as a result of the formation of a nanoparticle oxide network growing from a molten silicon core.

    View details for DOI 10.1103/PhysRevE.80.067401

    View details for Web of Science ID 000273228000094

    View details for PubMedID 20365306

  • Energetic neutrals in the cathode sheath of argon direct-current discharges JOURNAL OF APPLIED PHYSICS Ito, T., Cappelli, M. A. 2009; 106 (2)

    View details for DOI 10.1063/1.3160329

    View details for Web of Science ID 000268613000020

  • Time and space-correlated plasma potential measurements in the near field of a coaxial Hall plasma discharge PHYSICS OF PLASMAS Smith, A. W., Cappelli, M. A. 2009; 16 (7)

    View details for DOI 10.1063/1.3155097

    View details for Web of Science ID 000268615200058

  • Electrostatic probe disruption of drift waves in magnetized microdischarges APPLIED PHYSICS LETTERS Ito, T., Cappelli, M. A. 2009; 94 (21)

    View details for DOI 10.1063/1.3132587

    View details for Web of Science ID 000266500400009

  • The Hall effect and rocket flight PHYSICS TODAY Cappelli, M. 2009; 62 (4): 76-77
  • Predicting Electron Transport Using Simulated Axial Waves in a Radial-Axial Hybrid Hall Thruster Model Technical paper Scharfe, M. K., Cappelli, M. A., Fernandez, E. 2009
  • Preliminary Characterization of a Diverging Cusped Field (DCF) Thruster 31st International Electric Propulsion Conference Young, C., Smith, A., Cappelli, M. 2009

    View details for DOI 10.13140/2.1.2644.5123

  • Laser-Induced Fluorescence Velocity Measurements of a Low Power Cylindrical Hall Thruster DTIC Document MacDonald, N. A., Cappelli, M. A., Hargus Jr, W. A. 2009
  • Experimental Characterization of High Frequency Instabilities within the Discharge Channel of a Hall Thruster 31st International Electric Propulsion Conference Knoll, A. K., Cappelli, M. A. 2009
  • Jet Flame Ignition in a Supersonic Crossflow Using a Pulsed Nonequilibrium Plasma Discharge IEEE TRANSACTIONS ON PLASMA SCIENCE Do, H., Mungal, M. G., Cappelli, M. A. 2008; 36 (6): 2918-2923
  • A Study of Plasma-Stabilized Diffusion Flames at Elevated Ambient Temperatures IEEE TRANSACTIONS ON PLASMA SCIENCE Kim, W., Do, H., Mungal, M. G., Cappelli, M. A. 2008; 36 (6): 2898-2904
  • Shear-Based Model for Electron Transport in Hybrid Hall Thruster Simulations IEEE TRANSACTIONS ON PLASMA SCIENCE Scharfe, M. K., Thomas, C. A., Scharfe, D. B., Gascon, N., Cappelli, M. A., Fernandez, E. 2008; 36 (5): 2058-2068
  • An analysis of millimetre-wave interferometry on Hall thruster plumes by finite difference time domain simulations JOURNAL OF PHYSICS D-APPLIED PHYSICS Lee, J., Cappelli, M. A. 2008; 41 (18)
  • A simple isentropic model of electron transport in Hall thrusters JOURNAL OF PHYSICS D-APPLIED PHYSICS Knoll, A. K., Cappelli, M. A. 2008; 41 (16)
  • Magnetized microdischarge plasma generation at low pressure Ito, T., Kobayashi, K., Hamaguchi, S., Cappelli, M. A. ELSEVIER SCIENCE SA. 2008: 6668-6672
  • High speed images of drift waves and turbulence in magnetized microplasmas IEEE TRANSACTIONS ON PLASMA SCIENCE Ito, T., Cappelli, M. A. 2008; 36 (4): 1228-1229
  • Optimal discharge placement in plasma-assisted combustion of a methane jet in cross flow COMBUSTION AND FLAME Kim, W., Do, H., Mungal, M. G., Cappelli, M. A. 2008; 153 (4): 603-615
  • Cross-talk in multiple dielectric barrier discharge actuators APPLIED PHYSICS LETTERS Do, H., Kim, W., Cappelli, M. A., Mungal, M. G. 2008; 92 (7)

    View details for DOI 10.1063/1.2885085

    View details for Web of Science ID 000253540500021

  • Formation and role of cool flames in plasma-assisted premixed combustion APPLIED PHYSICS LETTERS Kim, W., Mungal, M. G., Cappelli, M. A. 2008; 92 (5)

    View details for DOI 10.1063/1.2841894

    View details for Web of Science ID 000253016500020

  • Growth of resistive instabilities in ExB plasma discharge simulations PHYSICS OF PLASMAS Fernandez, E., Scharfe, M. K., Thomas, C. A., Gascon, N., Cappelli, M. A. 2008; 15 (1)

    View details for DOI 10.1063/1.2823033

    View details for Web of Science ID 000252821500004

  • Bismuth Hall thruster II: Simulated diagnostics Journal of Technical Physics Scharfe, D. B., Cappelli, M. A. 2008; 49 (3-4): 349-361
  • Role of Negative Ions and Crosstalk in DBD Flow Actuation Bulletin of the American Physical Society Mungal, M. G., Do, H., Kim, W., Cappelli, M. A. 2008
  • Bismuth Hall thruster I: Simulation-suggested design and performance Journal of Technical Physics, J.Tech.Phys. Scharfe, D. B., Scharfe, M. K., Cappelli, M. A. 2008; 3–4 (49): 329–348
  • Magnetized microdischarge plasmas in low pressure argon and helium SECOND INTERNATIONAL SYMPOSIUM ON ATOMIC TECHNOLOGY Kobayashi, K., Ito, T., Cappelli, M. A., Hamaguchi, S. 2008; 106
  • On the role of oxygen in dielectric barrier discharge actuation of aerodynamic flows APPLIED PHYSICS LETTERS Kim, W., Do, H., Mungal, M. G., Cappelli, M. A. 2007; 91 (18)

    View details for DOI 10.1063/1.2803755

    View details for Web of Science ID 000250643600025

  • Simulating plasma-induced hall thruster wall erosion with a two-dimensional hybrid model IEEE TRANSACTIONS ON PLASMA SCIENCE Sommer, E., Scharfe, M. K., Gascon, N., Cappelli, M. A., Fernandez, E. 2007; 35 (5): 1379-1387
  • Experimental characterization of a micro-hall thruster JOURNAL OF PROPULSION AND POWER Ito, T., Gascon, N., Crawford, W. S., Cappelli, M. A. 2007; 23 (5): 1068-1074

    View details for DOI 10.2514/1.27140

    View details for Web of Science ID 000249671200021

  • On the production of energetic neutrals in the cathode sheath of direct-current discharges APPLIED PHYSICS LETTERS Ito, T., Cappelli, M. A. 2007; 90 (10)

    View details for DOI 10.1063/1.2711416

    View details for Web of Science ID 000244791700022

  • Investigation of NO production and flame structure in plasma enhanced premixed combustion PROCEEDINGS OF THE COMBUSTION INSTITUTE Kim, W., Do, H., Mungal, M. G., Cappelli, M. A. 2007; 31: 3319-3326
  • Preliminary Study of Arcjet Neutralization of Hall Thruster Clusters (Postprint) Walker, Quentin, E., Cappelli, Mark, A., Hargus, William, A. 2007
  • Shear-Based Model for Electron Transport in 2D Hybrid Hall Thruster Simulations 43rd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit Scharfe, M. K., Thomas, C. A., Scharfe, D. B., Gascon, N., Cappelli, M. A. 2007

    View details for DOI 10.2514/6.2007-5208

  • The Deflagration - Detonation Transition in Gas-Fed Pulsed Plasma Accelerators 43rd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit Poehlmann, F., Gascon, N., Cappelli, M. A. 2007

    View details for DOI 10.2514/6.2007-5263

  • Bluff body flow separation control using surface dielectric barrier discharges 45th AIAA Aerospace Sciences Meeting and Exhibit Do, H., Kim, W., Mungal, M. G., Cappelli, M. A. 2007

    View details for DOI 10.2514/6.2007-939

  • Numerical investigation of electron behavior in the near-field of Hall thrusters 43rd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit Smith, A. W., Cappelli, M. A. 2007

    View details for DOI 10.2514/6.2007-5240

  • Numerical Simulation of High Frequency Wave Coupling within a Hall Thruster 43rd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit Knoll, A., Gascon, N., Cappelli, M. 2007

    View details for DOI 10.2514/6.2007-5266

  • Towards Reduced Wall Effect Hall Plasma Accelerators Cappelli, M. A. 2007
  • Plasma-discharge stabilization of jet diffusion flames IEEE TRANSACTIONS ON PLASMA SCIENCE Kim, W., Do, H., Mungal, M. G., Cappelli, M. A. 2006; 34 (6): 2545-2551
  • Millimetre wave plasma interferometry in the near field of a Hall plasma accelerator JOURNAL OF PHYSICS D-APPLIED PHYSICS Cappelli, M. A., Gascon, N., Hargus, W. A. 2006; 39 (21): 4582-4588
  • Nonintrusive characterization of the azimuthal drift current in a coaxial E x B discharge plasma PHYSICAL REVIEW E Thomas, C. A., Gascon, N., Cappelli, M. A. 2006; 74 (5)

    Abstract

    A diagnostic is developed for the nonintrusive study of the azimuthal drift current in the coaxial ExB discharge of a Hall plasma accelerator. The technique of fast current interruption is used to generate a signal on several loop antenna that circle the outer wall of the discharge channel. The signal on the antenna is recorded, and used to determine the spatial distribution of the azimuthal drift at the moment of current interruption. The results of the experiment are compared to estimates derived via prior intrusive measurements, and the intrusive estimates are found to predict the spatial characteristics of the azimuthal drift, but underestimate its total magnitude. The self-induced magnetic field is then calculated and added to the applied magnetic field. The peak total magnetic field is seen to shift 2-5mm towards the anode due to self-induction, and suffer a reduction in magnitude of 10%-15%. The peak in the total magnetic field is then found to more closely coincide with the peak of the measured electric field than the peak of the vacuum magnetic field. It is concluded that the self-induced magnetic field could be important to anomalous electron mobility in the Hall-effect thruster, and simulation efforts should try to include its impact.

    View details for DOI 10.1103/PhysRevE.74.056402

    View details for Web of Science ID 000242408800038

    View details for PubMedID 17279996

  • Aerodynamic modification of flow over bluff objects by plasma actuation EXPERIMENTS IN FLUIDS Sung, Y., Kim, W., Mungal, M. G., Cappelli, M. A. 2006; 41 (3): 479-486
  • Low-power magnetized microdischarge ion source APPLIED PHYSICS LETTERS Ito, T., Cappelli, M. A. 2006; 89 (6)

    View details for DOI 10.1063/1.2335612

    View details for Web of Science ID 000239690800028

  • Comparison of hybrid Hall thruster model to experimental measurements PHYSICS OF PLASMAS Scharfe, M. K., Gascon, N., Cappelli, M. A., Fernandez, E. 2006; 13 (8)

    View details for DOI 10.1063/1.2336186

    View details for Web of Science ID 000240237700052

  • Ion energy distribution and gas heating in the cathode fall of a direct-current microdischarge PHYSICAL REVIEW E Ito, T., Cappelli, M. A. 2006; 73 (4)

    Abstract

    This paper reports on measurements of the ion energy distribution (IED) at the cathode of an argon dc microdischarge using energy-resolved molecular beam mass spectrometry. The measurements are conducted at a fixed pressure-electrode separation product (pd) of 1 cm Torr with a maximum discharge pressure of 20 Torr. The measured IED is compared to the theory of Davis and Vanderslice [W. D. Davis and T. A. Vanderslice, Phys. Rev. 131, 219 (1963)]. A higher pressure in a case of almost constant normalized current densities by pressure (Jp(-2) = 0.080+/-0.006 mA/cm(-2) Torr(-2)) yields a lower ratio of the ion mean free path to the sheath thickness. The results in almost constant Jp(-2) case then indicate that a scaling law of Jp(-2) is no longer applicable for IED of microdischarge. Expected background gaseous temperatures from IEDs with the collisional Child law have reasonable increasing with increased current density (J) in both cases of almost constant Jp(-2) and a constant pressure of 10 Torr. Supported by temperature measurement by laser absorption spectroscopy, it is demonstrated that the expanded theory might be applicable also to microdischarges (Ar approximately 20 Torr) with temperature adjusting.

    View details for DOI 10.1103/PhysRevE.73.046401

    View details for Web of Science ID 000237146800070

    View details for PubMedID 16711933

  • Measurements in Stationary Reference Bi Discharge Cell for Diagnostics of a Bismuth Hall Thruster 42ND AIAA/ASME/SAE/ASEE JOINT PROPULSION CONFERENCE & EXHIBIT Scharfe, D. B., Cappelli, M. A. 2006

    View details for DOI 10.2514/6.2006-4638

  • Introduction of Physical Transport Mechanisms into 2D Hybrid Hall Thruster Simulations 42nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit Allis, M. K., Thomas, C. A., Gascon, N., Cappelli, M. A., Fernandez, E. 2006

    View details for DOI 10.2514/6.2006-4325

  • The Magnetic Interference Hall Accelerator 42nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit Thomas, C., Sommier, E., Gascon, N., Cappelli, M. A. 2006

    View details for DOI 10.2514/6.2006-4993

  • Operation of a Coaxial High Energy (CHENG) Thruster 42nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit Poehlmann, F., Gascon, N., Thomas, C., Cappelli, M. A. 2006

    View details for DOI 10.2514/6.2006-5157

  • Fluctuation-induced transport in the Hall plasma accelerator 42nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit Thomas, C. A., Cappelli, M. A. 2006

    View details for DOI 10.2514/6.2006-5168

  • An axial-azimuthal hybrid simulation of coaxial Hall thrusters 42nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit Fernandez, E., A, K., Cappelli, M. A. 2006

    View details for DOI 10.2514/6.2006-4329

  • Coaxial Hall Thruster with Diamond Inner Channel Wall 42nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit Crawford, W. S., Corey, R. L., Cappelli, M. A. 2006

    View details for DOI 10.2514/6.2006-4995

  • Flame stabilization enhancement and NOx production using ultra short repetitively pulsed plasma discharges 44th AIAA Aerospace Sciences Meeting and Exhibit Kim, W., Do, H., Mungal, M. M., Cappelli, M. A. 2006

    View details for DOI 10.2514/6.2006-560

  • Investigation of field structure and electron behavior in the near-field of Hall thrusters 42nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit Smith, A. W., Cappelli, M. A. 2006

    View details for DOI 10.2514/6.2006-4835

  • Millimeter Wave Plasma Interferometry in the Near Field of a Hall Plasma Accelerator (PREPRINT) DTIC Document Cappelli, M. A., Gascon, N. C., Hargus, W. 2006
  • Further development of a micro Hall thruster 42nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit Ito, T., Gascon, N., Crawford, W., Cappelli, M. A. 2006

    View details for DOI 10.2514/6.2006-4495

  • Experimental investigation of high frequency plasma oscillations within Hall thrusters 42ND AIAA/ASME/SAE/ASEE JOINT PROPULSION CONFERENCE & EXHIBIT Knoll, A., Thomas, C., Gascon, N., Cappelli, M. 2006

    View details for DOI 10.2514/6.2006-5171

  • Wall erosion in 2D Hall thruster simulations 42nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit Sommier, E., Allis, M. K., Gascon, N., Cappelli, M. A. 2006

    View details for DOI 10.2514/6.2006-4656

  • Ultra-Low Power Stationary Plasma Thruster 29th International Electric Propulsion Conference Gascon, N., Crawford, W. S., Cappelli, M. A. 2005
  • Design and tuning of a vacuum microplasma spray system: Particle entrainment SURFACE ENGINEERING IN MATERIALS SCIENCE III Crawford, W. S., Cappelli, M. A., Prinz, F. B. 2005: 267-282
  • The VHITAL Program to Demonstrate the Performance and Lifetime of a Bismuth-Fueled Very High Isp Hall Thruster 41st AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit Marrese-Reading, C., Sengupta, A., Frisbee, R., Polk, J., Cappelli, M. A., Boyd, I., Keidar, M., Tverdoklebov, S., Semenkin, S., Markusic, T., Yalin, A., Knowles, T. 2005

    View details for DOI 10.2514/6.2005-4564

  • Stationary reference Bi discharge cell for optical diagnostics of a bismuth Hall thruster 29th International Electric Propulsion Conference Scharfe, D. B., Cappelli, M. A. 2005
  • Development of Optical Diagnostics for Bismuth Plasma Propulsion Devices IEEE International Conference on Plasma Science Scharfe, D. B., Cappelli, M. A. 2005: 165
  • A Two-Dimensional Hybrid (z-theta) Simulation of Coaxial Hall Thrusters 29th International Electric Propulsion Conference Fernandez, E., Knoll, A. K., Tarik, K., Cappelli, M. 2005
  • Electron Cross-Field Transport in 2D Hybrid Hall Thruster Simulation IEEE International Conference on Plasma Science Allis, M. K., Thomas, C., Gascon, N., Cappelli, M. A., Fernandez, E. 2005
  • Spectroscopic Measurements of Bismuth For Optical Diagnostics 41st AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit Scharfe, D. B., Cappelli, M. A. 2005

    View details for DOI 10.2514/6.2005-4230

  • Microwave interferometry (90 GHz) for Hall thruster plume density characterization 41st AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit Reed, G. D., Hargus Jr, W. A., Cappelli, M. A. 2005

    View details for DOI 10.2514/6.2005-4399

  • Hall thruster with an external acceleration zone DTIC Document Gascon, N., Corey, R. L., Cappelli, M. A., Hargus, W. 2005
  • Ion Energy Distributions in the Cathode Sheath of an Argon DC Microdischarge IEEE International Conference on Plasma Science Ito, T., Cappelli, M. A. 2005
  • Effect of Charge Exchange on 2D Hall Thruster Simulation 29th International Electric Propulsion Conference Allis, M. K., Gascon, N., Cappelli, M. A. 2005
  • Gradient transport processes in E× B plasmas 41st AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit Thomas, C. A., Cappelli, M. A. 2005

    View details for DOI 10.2514/6.2005-4063

  • Ion velocity measurements in a linear Hall thruster 41st AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit Gascon, N., Cappelli, M. A., Hargus, W. A. 2005

    View details for DOI 10.2514/6.2005-4401

  • Flame stabilization using a plasma discharge in a lifted jet flame 43rd AIAA Aerospace Sciences Meeting and Exhibit Kim, W., Mungal, M. G., Cappelli, M. A. 2005

    View details for DOI 10.2514/6.2005-931

  • Hall Thruster With an External Acceleration Zone AIR FORCE RESEARCH LAB EDWARDS AFB CA SPACE AND MISSILE PROPULSION DIV Gascon, N., Corey, Ronald, L., Cappelli, Mark, A., Hargus, W. 2005: 8
  • Non-local electric field effects in magnetized plasmas 29th International Electric Propulsion Conference Gascon, N., Allis, M., Sommier, E., Cappelli, M. A. 2005
  • A Two-Dimensional (z-θ) Fluid/PIC Simulation of Coaxial Hall Thrusters 29th International Electric Propulsion Conference Fernandez, E., Knoll, A., Cappelli, M. A., Kaya, T. 2005
  • Arcjet plasma neutralization of Hall thrusters, Part 1: Hybrid thruster mission analysis JOURNAL OF SPACECRAFT AND ROCKETS Hargus, W. A., Schilling, J. H., Walker, Q. E., Cappelli, M. A. 2004; 41 (6): 1016-1022
  • Arcjet neutralization of Hall thrusters, Part 2: Experimental demonstration JOURNAL OF SPACECRAFT AND ROCKETS Walker, Q. E., Gascon, N., Cappelli, M. A., Hargus, W. A., Schilling, J. A. 2004; 41 (6): 1023-1030
  • Non-intrusive characterization of the hall thruster azimuthal drift current 40th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit Thomas, C. A., Gascon, N., Cappelli, M. A. 2004

    View details for DOI 10.2514/6.2004-3776

  • Arcjet Plasma Neutralization of Hall Thrusters, Part 2: Experimental Demonstration Journal of Spacecraft and Rockets Walker, Q. E., Gascon, N., Cappelli, M. A., Hargus, Jr., W. A., Schilling, J. H. 2004; 41: 1023-1030

    View details for DOI 10.2514/1.3280

  • Very high Isp thruster with anode layer (VHITAL): an overview Space 2004 Conference and Exhibit Marrese-Reading, C. M., Frisbee, R., Sengupta, A., Cappelli, M. A., Tverdoklebov, S., Semenkin, S., Boyd, I. 2004

    View details for DOI 10.2514/6.2004-5910

  • A Comparison of 2-D Hybrid Hall Thruster Model to Experimental Measurements 40th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit Allis, M. K., Gascon, N., Vialard-Goudou, C., Cappelli, M. A., Fernandez, E. 2004

    View details for DOI 10.2514/6.2004-3951

  • Optical Diagnostics Options for Bismuth Hall Thrusters 40TH AIAA/ASME/SAE/ASEE JOINT PROPULSION CONFERENCE AND EXHIBIT Scharfe, D. B., Cappelli, M. A. 2004

    View details for DOI 10.2514/6.2004-3946

  • Images of Ground State Xenon Density in the Near Field of Low Power Hall Thruster 40th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit Cappelli, M. A., Hargus Jr, W. A. 2004

    View details for DOI 10.2514/6.2004-4120

  • Mechanism for anomalously high voltages in high-pressure dc microdischarge mixtures of He, Ne, and Xe JOURNAL OF APPLIED PHYSICS Ganter, R., Cappelli, M. 2003; 94 (3): 2145-2147

    View details for DOI 10.1063/1.1590406

    View details for Web of Science ID 000184400400130

  • Optical measurements of plasma velocity and temperature in a low-rate, low-power LPPS system SURFACE & COATINGS TECHNOLOGY Hamatani, H., Crawford, W. S., Cappelli, M. A. 2003; 162 (1): 79-92
  • Plasma Oscillations and Wall Material Effects in a Hall Thruster 39th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit Gascon, N., Meezan, N. B., Thomas, C. A., Cappelli, M. A. 2003

    View details for DOI 10.2514/6.2003-4857

  • Further Studies of a Linear Hall thruster 39th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit Gascon, N., Thomas, C. A., Hermann, W. A., Cappelli, M. A. 2003

    View details for DOI 10.2514/6.2003-5156

  • Spatial and Temporal Mapping of Azimuthal Drift Current in a Hall Thruster 39th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit Thomas, C. A., Gascon, N., Cappelli, M. A. 2003

    View details for DOI 10.2514/6.2003-4854

  • Wall effects on the excitation and propagation of instabilities in Hall thrusters Gascon, N., Capelli, M. A. 2003
  • A Study of the Azimuthal Electron Drift in an E x B Discharge Using a Non-invasive Antenna Array 39th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit Thomas, C. A., Cappelli, M. A. 2003

    View details for DOI 10.2514/6.2003-4854

  • Interactions within a cluster of low power Hall thrusters 39th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit Hargus, W. A., Cappelli, M. A. 2003

    View details for DOI 10.2514/6.2003-5006

  • Operating regimes of a linear SPT with low secondary electron-induced wall conductivity 39th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit Gascon, N., Thomas, C., Hermann, W. A., Cappelli, M. A. 2003

    View details for DOI 10.2514/6.2003-5156

  • Vacuum ultraviolet absorption measurements of ground state xenon in the near field of a low power Hall thruster 39th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit Cappelli, M. A., Hargus, W. A. 2003

    View details for DOI 10.2514/6.2003-5007

  • Overview of electric propulsion research in US academia 39th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit Gallimore, A., Boyd, I., Burton, R., Martinez-Sanchez, M., Batischev, O., Williams, J., Yalin, A., Wilbur, P. J., Wilbur, P., Winglee, R., Mikellides, P., Fisch, N., Raitses, Y., Choueiri, E., Roy, S., Wang, J. 2003

    View details for DOI 10.2514/6.2003-4442

  • Plasma instabilities in the ionization regime of a Hall thruster 39TH AIAA/ASME/SAE/ASEE JOINT PROPULSION CONFERENCE AND EXHIBIT Gascon, N., Cappelli, M. A. 2003

    View details for DOI 10.2514/6.2003-4857

  • Kinetic and surface mechanisms to growth of hexagonal boron nitride SURFACE ENGINEERING 2002-SYNTHESIS, CHARACTERIZATION AND APPLICATIONS Barreto, P. R., Kull, A. E., Cappelli, M. A. 2003; 750: 313-318
  • Laser-induced-fluorescence characteristics of a helium arcjet flow APPLIED PHYSICS B-LASERS AND OPTICS Walker, Q. E., Cappelli, M. A. 2002; 75 (6-7): 717-722
  • Kinetic study of wall collisions in a coaxial Hall discharge PHYSICAL REVIEW E Meezan, N. B., Cappelli, M. A. 2002; 66 (3)

    Abstract

    Coaxial Hall discharges (also known as Hall thrusters, stationary plasma thrusters, and closed-drift accelerators) are cross-field plasma sources under development for space propulsion applications. The importance of the electron-wall interaction to the Hall discharge operation is studied the through analysis of experimental data and simulation of the electron energy distribution function (EEDF) inside the discharge channel. Experimental time-average plasma property data from a laboratory Hall discharge are used to calculate the electron conductivity and to estimate the rate of wall-loss collisions. The electron Boltzmann equation is then solved in the local field limit, using the experimental results as inputs. The equation takes into account ionization and wall collisions, including secondary electrons produced at the wall. Local electron balances are used to calculate the sheath potential at the insulator walls. Results show an EEDF depleted at high energy due to electron loss to the walls. The calculated EEDFs agree well with experimental electron temperature data when the experimentally determined effective collision frequency is used for electron momentum transport. The electron wall-loss and wall-return frequencies are extremely low compared to those predicted by a Maxwellian of equal average energy. The very low frequency of wall collisions suggests that secondary electrons do not contribute to cross-field transport. This conclusion holds despite significant experimental uncertainty.

    View details for DOI 10.1103/PhysRevE.66.036401

    View details for Web of Science ID 000178624400015

    View details for PubMedID 12366261

  • Ion beam dynamics in a linear Hall discharge IEEE TRANSACTIONS ON PLASMA SCIENCE Meezan, N. B., Cappelli, M. A. 2002; 30 (1): 138-139
  • Interior and exterior laser-induced fluorescence and plasma measurements within a Hall thruster JOURNAL OF PROPULSION AND POWER Hargus, W. A., Cappelli, M. A. 2002; 18 (1): 159-168
  • Transport physics in Hall plasma thrusters 40th AIAA Aerospace Sciences Meeting & Exhibit Cappelli, M. A., Meezan, N. B., Gascon, N. 2002

    View details for DOI 10.2514/6.2002-485

  • A characterization of plasma fluctuations within a hall discharge IEEE TRANSACTIONS ON PLASMA SCIENCE Chesta, E., Lam, C. M., Meezan, N. B., Schmidt, D. P., Cappelli, M. A. 2001; 29 (4): 582-591
  • Laser-induced fluorescence measurements of velocity within a Hall discharge APPLIED PHYSICS B-LASERS AND OPTICS Hargus, W. A., Cappelli, M. A. 2001; 72 (8): 961-969
  • Mass spectrometric and Langmuir probe measurements in inductively coupled plasmas in Ar, CHF3/As and CHF3/Ar/O-2 mixtures PLASMA SOURCES SCIENCE & TECHNOLOGY Kim, J. S., Rao, M. V., Cappelli, M. A., Sharma, S. P., Meyyappan, M. 2001; 10 (2): 191-204
  • Parametric study of the vacuum ultraviolet emission and electrical characteristics of a He-Xe microdischarge JOURNAL OF APPLIED PHYSICS Postel, O. B., Cappelli, M. A. 2001; 89 (9): 4719-4726
  • Stability of a magnetized Hall plasma discharge JOURNAL OF APPLIED PHYSICS Chesta, E., Meezan, N. B., Cappelli, M. A. 2001; 89 (6): 3099-3107
  • Anomalous electron mobility in a coaxial Hall discharge plasma PHYSICAL REVIEW E Meezan, N. B., Hargus, W. A., Cappelli, M. A. 2001; 63 (2)

    Abstract

    A comprehensive analysis of measurements supporting the presence of anomalous cross-field electron mobility in Hall plasma accelerators is presented. Nonintrusive laser-induced fluorescence measurements of neutral xenon and ionized xenon velocities, and various electrostatic probe diagnostic measurements are used to locally determine the effective electron Hall parameter inside the accelerator channel. These values are then compared to the classical (collision-driven) Hall parameters expected for a quiescent magnetized plasma. The results indicate that in the vicinity of the anode, where there are fewer plasma instabilities, the electron-transport mechanism is likely elastic collisions with the background neutral xenon. However, we find that in the vicinity of the discharge channel exit, where the magnetic field is the strongest and where there are intense fluctuations in the plasma properties, the inferred Hall parameter departs from the classical value, and is close to the Bohm value of (omega(ce)tau)(eff) approximately 16. These results are used to support a simple model for the Hall parameter that is based on the scalar addition of the electron collision frequencies (elastic collision induced plus fluctuation induced), as proposed by Boeuf and Garrigues [J. Appl. Phys. 84, 3541 (1998)]. The results also draw attention to the possible role of fluctuations in enhancing electron transport in regions where the electrons are highly magnetized.

    View details for Web of Science ID 000167022500062

    View details for PubMedID 11308588

  • Performance of a linear Hall discharge with an open electron drift 37th Joint Propulsion Conference and Exhibit Cappelli, M. A., Walker, Q. E., Meezan, N. B., Hargus, W. 2001

    View details for DOI 10.2514/6.2001-3503

  • Advanced Optical and Electrostatic Characterization of Closed-Electron Drift Thrusters Cappelli, Mark, A. 2001
  • High density plasma neutralization of a Hall thruster 37th Joint Propulsion Conference and Exhibit Walker, Q. E., Cappelli, M. A. 2001

    View details for DOI 10.2514/6.2001-3352

  • Electron energy distribution function in a Hall discharge plasma 37th Joint Propulsion Conference and Exhibit Meezan, N. B., Cappelli, M. A. 2001

    View details for DOI 10.2514/6.2001-3326

  • Numerical study of instabilities in a magnetized Hall discharge 37th Joint Propulsion Conference and Exhibit Cappelli, M. A., Chesta, E., Gascon, N. 2001

    View details for DOI 10.2514/6.2001-3324

  • Linear geometry Hall thruster with boron nitride and diamond walls Gascon, N., Cappelli, M. A. 2001
  • Development of a colloid micro-thruster for flight demonstration on the Emerald nanosatellite 37th Joint Propulsion Conference and Exhibit Pranajaya, F. M., Cappelli, M. A. 2001

    View details for DOI 10.2514/6.2001-3330

  • Performance studies of a colloid thruster system Pranajaya, F. M., Cappelli, M. A. 2001
  • Preliminary Study of Arcjet Neutralization of Hall Thruster Clusters Walker, Q. E., Cappelli, M. A., Hargus Jr, W. A., Schilling, J. 2001
  • Dispersion of low frequency waves in a Hall discharge 37th Joint Propulsion Conference and Exhibit Gascon, N., Chesta, E., Meezan, N., Cappelli, M. 2001

    View details for DOI 10.2514/6.2001-3506

  • A 90 GHz Phase-Bridge Interferometer for Plasma Density Measurements In the Near Field of a Hall Thruster 40th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, Joint Propulsion Conferences Cappelli, M. A., Hermann, W., Kodiak, M., Gascon, N., Hargus, Jr., W. 2001

    View details for DOI 10.2514/6.2004-3775

  • Doppler-free absorption measurements of Stark broadening in a flowing hydrogen plasma JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER Cappelli, M. A., Walker, Q. E., Storm, P. V. 2000; 66 (4): 343-361
  • Methyl concentration measurements during microwave plasma-assisted diamond deposition PLASMA CHEMISTRY AND PLASMA PROCESSING Cappelli, M. A., Owano, T. G., Gicquel, A., Duten, X. 2000; 20 (1): 1-12
  • Raman scattering measurements of molecular hydrogen in a low-density, arc-heated plasma APPLIED PHYSICS B-LASERS AND OPTICS Beattie, D. R., Cappelli, M. A. 2000; 70 (3): 419-427
  • A low-power, linear-geometry Hall plasma source with an open electron-drift PLASMA SOURCES SCIENCE & TECHNOLOGY Schmidt, D. P., Meezan, N. B., Hargus, W. A., Cappelli, M. A. 2000; 9 (1): 68-76
  • Vacuum emission and breakdown characteristics of a planar He-Xe microdischarge APPLIED PHYSICS LETTERS Postel, O. B., Cappelli, M. A. 2000; 76 (5): 544-546
  • Characterization and dielectric properties of fluorinated amorphous carbon measured by capacitance-voltage response and spectroscopic ellipsometry AMORPHOUS AND NANOSTRUCTURED CARBON Glew, A. D., Cappelli, M. A. 2000; 593: 341-346
  • Fluctuation-induced electron transport in closed-drift Hall discharges 27th IEEE International Conference on Plasma Science Cappelli, M. A., Meezan, N. B., Chesta, E. 2000
  • A Linear Stability Analysis of a Magnetized Hall Plasma Discharge American Physical Society, 42nd Annual Meeting of the APS Division of Plasma Physics combined with the 10th International Congress on Plasma Physics October 23 - 27, 2000 Québec City, Canada Meeting ID: DPP00 Cappelli, Mark, A., Chesta, E., Meezan, Nathan, B. 2000
  • Vacuum ultraviolet emission and metastable state properties of DC microdischarges 27th IEEE International Conference on Plasma Science Postel, O. B., Cappelli, M. A. 2000
  • Electron density measurements for determining the anomalous electron mobility in a coaxial Hall discharge plasma 36th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit Meezan, N. B., Cappelli, M. A. 2000

    View details for DOI 10.2514/6.2000-3420

  • Characterization of Inert Gas Plasma Thrusters Cappelli, M. 2000
  • Electrohydrodynamic flow control with a glow-discharge surface plasma AIAA journal Cappelli, M. A., Roth, J. R., Sherman, D. M., Wilkinson, S. P. 2000; 38 (7): 1166-1172

    View details for DOI 10.2514/2.1110

  • A molecular beam mass spectrometer for plasma jet chemical vapor deposition reactor diagnostics 27th IEEE International Conference on Plasma Science Kull, A. E., Cappelli, M. A. 2000
  • Model predictions versus experiments: CH3 radical density profiles in diamond deposition microwave plasma reactor DIAMOND MATERIALS VI Gicquel, A., Hassouni, K., Owano, T., Duten, X., Cappelli, M. 2000; 99 (32): 41-52
  • Ion energy and momentum flux dependence of diamond-like carbon film synthesis in radio frequency discharges SURFACE & COATINGS TECHNOLOGY Glew, A. D., Saha, R., Kim, J. S., Cappelli, M. A. 1999; 114 (2-3): 224-229
  • Coherent structures in crossed-field closed-drift Hall discharges IEEE TRANSACTIONS ON PLASMA SCIENCE Cappelli, M. A., Hargus, W. A., Meezan, N. B. 1999; 27 (1): 96-97
  • In situ plasma analysis, fluorine incorporation, thermostability, stress, and hardness comparison of fluorinated amorphous carbon and hydrogenated amorphous carbon thin films deposited on Si by plasma enhanced chemical vapor deposition LOW-DIELECTRIC CONSTANT MATERIALS V Glew, A. D., Cappelli, M. A., Touzelbaev, M. N., Hu, Y. 1999; 565: 285-290
  • Laser-Induced Fluorescence Measurements within a Laboratory Hall Thruster (Postprint) Hargus Jr., W., A., Cappelli, M., A. 1999
  • The Breakdown and Vacuum Emission Characteristics of a High Surface Area to Volume Ratio Discharge American Physical Society, Gaseous Electronics Conference Postel, O. B., Cappelli, M. A. 1999
  • Dispersion of Low-Frequency Azimuthal Waves in Hall Discharges American Physical Society, 41st Annual Meeting of the Division of Plasma Physics Cappelli, M. A., Schmidt, D. P., Meezan, N. B. 1999
  • Electrical and VUV/Vis. Emission Characteristics of a Xe/He microdischarge American Physical Society, 41st Annual Meeting of the Division of Plasma Physics Cappelli, M. A., Postel, O. B. 1999
  • Laser-induced fluorescence measurements of a helium arcjet flow 30th Plasmadynamic and Lasers Conference Walker, Q. E., Cappelli, M. A. 1999

    View details for DOI 10.2514/6.1999-3603

  • Characterization of plasma disturbances in a Hall discharge using a double probe 30th Plasmadynamic and Lasers Conference Schmidt, D. P., Meezan, N. B., Cappelli, M. A. 1999

    View details for DOI 10.2514/6.1999-3437

  • Operating characteristics of a linear Hall thruster with an open electron-drift 35th Joint Propulsion Conference and Exhibit Schmidt, D. P., Meezan, N. B., Hargus Jr, W. A., Cappelli, M. A. 1999

    View details for DOI 10.2514/6.1999-2569

  • Interior and exterior laser-induced fluorescence and plasma potential measurements on a laboratory Hall thruster 35th Joint Propulsion Conference and Exhibit Hargus Jr, W. A., Cappelli, M. A. 1999

    View details for DOI 10.2514/6.1999-2721

  • Optical study of anomalous electron transport in a laboratory Hall thruster 35th Joint Propulsion Conference and Exhibit Meezan, N. B., Hargus Jr., W. A., Schmidt, D. P., Cappelli, M. A. 1999

    View details for DOI 10.2514/6.1999-2284

  • Measurements of Ion Energy and Ion Flux Distributions in Inductively Coupled Plasmas in CF4/O2/Ar Mixtures Rao, M., V. V. S., Kim, J., S., Cappelli, M., A., Sharma, S., P. 1999
  • Anomalous Transport in Closed-Drift Hall Discharges American Physical Society, 41st Annual Meeting of the Division of Plasma Physics Meezan, N., B., Cappelli, Mark, A. 1999
  • Low-rate reactive and non-reactive low pressure plasma spraying IEEE International Conference on Plasma Science Crawford, W. S., Cappelli, M. A., Prinz, F. B. 1999
  • CF2 Detection in Radio-Frequency Ar/CHF3 Plasmas by Fourier Transform Infrared Spectroscopy American Physical Society, Gaseous Electronics Conference Kim, J. S., Rao, M. V., Cappelli, M. A., Sharma, S. P. 1999
  • LIF measurements of a low-power helium arcjet IEEE International Conference on Plasma Science Walker, Q. E., Cappelli, M. A. 1999
  • Mass spectrometric investigations of a plasma jet chemical vapor deposition reactor IEEE International Conference on Plasma Science Kull, A. E., Cappelli, M. A. 1999
  • Langmuir Probe Distortions and Probe Compensation in an Inductively Coupled Plasma Ji, J. S., Cappelli, M. A., Kim, J. S., Rao, V., S. M 1999
  • Laser induced fluorescence measurements within a laboratory Hall thruster 30th Plasmadynamic and Lasers Conference Hargus, Jr., W. A., Cappelli, M. A. 1999

    View details for DOI 10.2514/6.1999-3436

  • Interior and Exterior Laser-Induced Fluorescence and Plasma Potential Measurements on a Laboratory Hall Thruster (Postprint) DTIC Document Hargus Jr, W. A., Cappelli, M. A. 1999
  • The structure of an expanding hydrogen arcjet plasma PHYSICS OF PLASMAS Hargus, W. A., Cappelli, M. A. 1998; 5 (12): 4488-4497
  • Competing surface oxidation reactions during diamond synthesis in low pressure flames JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS Kim, J. S., Cappelli, M. A. 1998; 37 (11): 6223-6228
  • Temperature measurements in low-pressure, diamond-forming, premixed flames JOURNAL OF APPLIED PHYSICS Kim, J. S., Cappelli, M. A. 1998; 84 (8): 4595-4602
  • Arcjet nozzle flow-field characterization by laser-induced fluorescence APPLIED OPTICS Storm, P. V., Cappelli, M. A. 1998; 37 (3): 486-495

    Abstract

    Laser-induced fluorescence of the Balmer-alpha (H(alpha)) transition of atomic hydrogen was performed within the nozzle of a 1-kW class radiatively cooled arcjet thruster operating on hydrogen and synthesized-hydrazine propellants. Axial velocities were determined from the Doppler shift of the H(alpha) line center relative to a stationary reference, whereas translational temperatures and electron number densities were determined from a line-shape analysis of the H(alpha) transition. The results are compared with a numerical model and indicate excellent agreement with the velocities, as well as temperatures near the nozzle exit. There are discrepancies, however, in the temperatures far upstream of the exit and in the electron densities, suggesting needed improvements in the modeling of the recombination chemistry.

    View details for Web of Science ID 000071501400013

    View details for PubMedID 18268611

  • CH3 and CFx Detection in Low Pressure RF Discharges by Broadband Ultraviolet Absorption Spectroscopy Cappelli, M., A., Kim, J., S., Sharma, S., P. 1998
  • Main physical features and processes determining the performance of stationary plasma thrusters Journal of Propulsion and Power Cappelli, M. A., Kim, V. 1998; 14 (5): 736-743

    View details for DOI 10.2514/2.5335

  • Overview of US academic programs in electric propulsion 34th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit Burton, R. L., Micci, M. M., Boyd, I. D., Martinez-Sanchez, M. M., Keefer, D. R., Gatsonis, N. A., Cappelli, M. A., Gallimore, A. D., Turchi, P. J., Wilbur, P. J., Hrbud, I., Choueri, E. Y. 1998

    View details for DOI 10.2514/6.1998-3182

  • Optical and electrostatic characterization of oscillatory Hall discharge behavior 34th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit Meezan, N. B., Hargus, Jr., W. A., Cappelli, M. A. 1998

    View details for DOI 10.2514/6.1998-3502

  • In Situ CF3 Detection in Low Pressure RF Discharges by Fourier Transform Infrared Spectroscopy Kim, J., S., Cappelli, M., A., Sharma, S., P. 1998
  • Laser Induced Fluorescence Measurements on a Laboratory Hall Thruster (Postprint) stormingmedia.us Cappelli, M. A., Hargus, J. 1998: 12
  • Characterization of a low-power helium arcjet 34th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit Walker, Q. E., Hargus Jr, W. A., Cappelli, M. A. 1998

    View details for DOI 10.2514/6.1998-3636

  • Development of a linear Hall thruster 34th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit Hargus Jr., W. A., Cappelli, M. A. 1998

    View details for DOI 10.2514/6.1998-3336

  • Diagnostics of Plasma Propulsion Devices American Physical Society, Division of Plasma Physics Meeting Cappelli, M. A. 1998
  • Measurements of electron density at the exit of an arcjet thruster 34th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit Cappelli, M. A., Walker, Q. E., Storm, P. V. 1998

    View details for DOI 10.2514/6.1998-3635

  • Ion Energy Distributions and their Relative Abundance in Inductively Coupled Plasmas 51st Annual Gaseous Electronics Conference & 4th International Conference on Reactive Plasmas Kim, J. S., Rao, M. V., Cappelli, M. A., Sharma, S. P. 1998
  • Laser induced fluorescence measurements on a laboratory Hall thruster 34th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit Hargus Jr, W. A., Cappelli, M. A. 1998

    View details for DOI 10.2514/6.1998-3645

  • Oscillatory Behavior in Closed-Drift Hall Plasma Discharges American Physical Society, Division of Plasma Physics Meeting Cappelli, M., A., Meezan, N., B., Hargus Jr, W., H. 1998
  • 2D simulations of Hall thrusters CTR Annual Research Briefs Fernandez, E., Cappelli, M. A., Mahesh, K. 1998
  • Laser Induced Fluorescence Measurements on a Laboratory Hall Thruster (Postprint) Hargus Jr, W. A., Cappelli, M. A. 1998
  • Fundamental Studies of the Electrode Regions in Arcjet Thrusters Cappelli, Mark, A. 1998
  • Langmuir Probe Measurements in an Inductively Coupled GEC Reference Cell Plasma APS Meeting Abstracts Ji, J. S., Kim, J. S., Cappelli, M. A., Sharma, S., P. 1998
  • Plasma-jet deposition of diamond Low-Pressure Synthetic Diamond Cappelli, M. A., Owano, T. G. 1998: 59-84
  • Near-edge X-ray absorption fine structure spectroscopy of arcjet-deposited cubic boron nitride DIAMOND AND RELATED MATERIALS BERNS, D. H., Cappelli, M. A., Shuh, D. K. 1997; 6 (12): 1883-1886
  • Laser-induced fluorescence study of a xenon Hall thruster APPLIED PHYSICS B-LASERS AND OPTICS Cedolin, R. J., Hargus, W. A., Storm, P. V., Hanson, R. K., Cappelli, M. A. 1997; 65 (4-5): 459-469
  • Low energy ion impact-enhanced growth of cubic boron nitride in a supersonic nitrogen/argon plasma flow JOURNAL OF MATERIALS RESEARCH BERNS, D. H., Cappelli, M. A. 1997; 12 (8): 2014-2026
  • Arcjet plasma enhanced vapor phase epitaxy of GaN MATERIALS LETTERS Cappelli, M. A., Kull, A. E., Schwendner, K., LEE, H., Harris, S. J., MROCZKOWSKI, J. 1997; 31 (3-6): 161-164
  • CH3 detection in a low-density supersonic arcjet plasma during diamond synthesis APPLIED PHYSICS LETTERS Loh, M. H., Cappelli, M. A. 1997; 70 (8): 1052-1054
  • The Stability of Arc Attachment in Arcjet Propulsion Devices. STANFORD UNIV CA DEPT OF MECHANICAL ENGINEERING Cappelli, Mark, A., Yuan, B. 1997: 93
  • A performance study of a low power Hall thruster 33rd Joint Propulsion Conference and Exhibit Hargus Jr., W. A., Cedolin, R. J., Meezan, N. B., Cappelli, M. A. 1997

    View details for DOI 10.2514/6.1997-3061

  • Laser-induced fluorescence study of a xenon Hall thruster 33rd Joint Propulsion Conference and Exhibit Cedolin, R. J., Hargus, Jr, W. A., Storm, P. V., Hanson, R. K., Cappelli, M. A. 1997

    View details for DOI 10.2514/6.1997-3053

  • A study of a Low Power Hall thruster transient Behavior International Electric Hargus Jr., W., A., Meezan, N. B., Cappelli, M. A. 1997
  • CH3 detection in a low-density supersonic arcjet plasma during diamond synthesis Applied physics letters Loh, M. H., Cappelli, M. A. 1997; 70 (8): 1052 - 1054

    View details for DOI 10.1063/1.118439

  • The transient behavior of a low power laboratory xenon Hall thruster 33rd Joint Propulsion Conference and Exhibit Hargus Jr, W. A., Meezan, N. B., Cappelli, M. A. 1997

    View details for DOI 10.2514/6.1997-3050

  • Radiative emission analysis of an expanding hydrogen arc plasma .1. Arc region diagnostics through axial emission JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER Storm, P. V., Cappelli, M. A. 1996; 56 (6): 901-918
  • Radiative emission analysis of an expanding hydrogen arc plasma .2. Plume region diagnostics through radial emission JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER Storm, P. V., Cappelli, M. A. 1996; 56 (6): 919-932
  • Interior plasma diagnostics of arcjet thrusters JOURNAL OF PROPULSION AND POWER Cappelli, M. A., Storm, P. V. 1996; 12 (6): 1070-1076
  • Stark broadening corrections to laser-induced fluorescence temperature measurements in a hydrogen arcjet plume APPLIED OPTICS Storm, P. V., Cappelli, M. A. 1996; 35 (24): 4913-4918

    Abstract

    Laser-induced fluorescence of the H(?) transition of atomic hydrogen has previously been performed in the plume of a hydrogen arcjet thruster. Measurements of plasma velocity and temperature, based on the Doppler shift and broadening of the H(?) line shape, were previously published [Appl. Opt. 32, 6117 (1993)]. In that paper the Stark broadening of the H(?) transition was estimated from static-ion calculations performed in the early 1970's and found to be negligible in comparison with the Doppler broadening. However, more recent dynamic-ion calculations have shown the Stark broadening to be considerably larger than was previously assumed, resulting in inaccurate temperature measurements. We present a reanalysis of the fluorescence data, taking into account the improved Stark broadening calculations. The correct atomic hydrogen translation temperature and electron number density are obtained from the Doppler and Stark broadening components of the measured line shape. The results indicate a substantial drop in temperature from those previously reported.

    View details for Web of Science ID A1996VC32000030

    View details for PubMedID 21102917

  • Laser-induced fluorescence measurements of resonance broadening in xenon PHYSICAL REVIEW A Cedolin, R. J., Hanson, R. K., Cappelli, M. A. 1996; 54 (1): 335-342
  • Cubic boron nitride synthesis in low-density supersonic plasma flows APPLIED PHYSICS LETTERS BERNS, D. H., Cappelli, M. A. 1996; 68 (19): 2711-2713
  • Fluorescence velocity measurements in the interior of a hydrogen arcjet nozzle AIAA JOURNAL Storm, P. V., Cappelli, M. A. 1996; 34 (4): 853-855
  • GaN film growth by a supersonic arcjet plasma Cappelli, M. A., Kull, A. E., Schwendner, K., LEE, H., Harris, S. J., MROCZKOWSKI, J. MATERIALS RESEARCH SOCIETY. 1996: 359-364
  • Laser-induced fluorescence diagnostics for xenon Hall thrusters 32nd Joint Propulsion Conference and Exhibit Cedolin, R. J., Hargus, W. A., Hanson, R. K., Cappelli, M. A. 1996

    View details for DOI 10.2514/6.1996-2986

  • Mass flux measurements in the plume of a low power arcjet nozzle 32nd Joint Propulsion Conference and Exhibit Hargus, Jr., W. A., Cappelli, M. A. 1996

    View details for DOI 10.2514/6.1996-3190

  • Thermodynamic analysis based on measurements of flowfield properties in low power hydrogen arcjet thrusters 32nd Joint Propulsion Conference and Exhibit Cappelli, M. A., Berns, D. H., Hargus, Jr, W. A., Storm, P. V. 1996

    View details for DOI 10.2514/6.1996-3293

  • LIF characterization of arcjet nozzle flows 32nd Joint Propulsion Conference and Exhibit Storm, P. V., Cappelli, M. A. 1996

    View details for DOI 10.2514/6.1996-2987

  • Plasma and Cathode Emission from a High Power Hydrogen Arcjet Thruster 32nd Joint Propulsion Conference and Exhibit Berns, D. H., Storm, P. V., Hargus, Jr., W. A., Cappelli, M. A., McFall, K. A., Spores, R. A. 1996

    View details for DOI 10.2514/6.1996-2703

  • Diamond film synthesis in low pressure premixed flames of different fuel types Kim, J. S., Cappelli, M. A. ELSEVIER SCIENCE SA. 1995: 791-796
  • DIAMOND FILM SYNTHESIS IN LOW-PRESSURE PREMIXED METHANE-OXYGEN FLAMES APPLIED PHYSICS LETTERS Kim, J. S., Cappelli, M. A. 1995; 67 (8): 1081-1083
  • EXPERIMENTAL INVESTIGATION OF VELOCITY SLIP NEAR AN ARCJET EXIT PLANE AIAA JOURNAL LIEBESKIND, J. G., Hanson, R. K., Cappelli, M. A. 1995; 33 (2): 373-375
  • AN EXPERIMENTAL-STUDY OF THE TEMPERATURE AND STOICHIOMETRY DEPENDENCE OF DIAMOND GROWTH IN LOW-PRESSURE FLAT FLAMES JOURNAL OF MATERIALS RESEARCH Kim, J. S., Cappelli, M. A. 1995; 10 (1): 149-157
  • LIF lineshape analysis of the xenon 6s(3/2)2 exp 0-6p(3/2)2 and 6s(3/2)1 exp 0-6p(1/2)0 transitions in a glow discharge 26th Plasmadynamics and Lasers Conference Cedolin, R. J., Hanson, R. K., Cappelli, M. A. 1995

    View details for DOI 10.2514/6.1995-1969

  • Non-equilibrium flow phenomena in low power hydrogen arcjets 31st Joint Propulsion Conference and Exhibit Butler, G. W., Boyd, I. D., Cappelli, M. A. 1995

    View details for DOI 10.2514/6.1995-2819

  • Laser-induced fluorescence measurements within an arcjet thruster nozzle 31st Joint Propulsion Conference and Exhibit Storm, P. V., Cappelli, M. A. 1995

    View details for DOI 10.2514/6.1995-2381

  • Raman scattering measurements of molecular hydrogen in an arcjet thruster plume 26th Plasmadynamics and Lasers Conference Beattie, D. R., Cappelli, M. A. 1995

    View details for DOI 10.2514/6.1995-1956

  • High spectral resolution emission study of a low power hydrogen arcjet plume 26th Plasmadynamics and Lasers Conference Storm, P. V., Cappelli, M. A. 1995

    View details for DOI 10.2514/6.1995-1960

  • Fundamental Studies of the Near-Electrode Regions in Arcjet Thrusters. Cappelli, Mark, A. 1995
  • Ceramic thin film synthesis via arcjet CVD 31st Joint Propulsion Conference and Exhibit Berns, D. H., Kull, A. E., Cappelli, M. A. 1995

    View details for DOI 10.2514/6.1995-2824

  • Spectral imaging of the arcjet electrode region 26th Plasmadynamics and Lasers Conference Berns, D. H., Storm, P. V., Cappelli, M. A. 1995

    View details for DOI 10.2514/6.1995-1957

  • Pressure measurements in the plume of a low power arcjet nozzle 31st Joint Propulsion Conference and Exhibit Hargus Jr, W. A., Cappelli, M. A. 1995

    View details for DOI 10.2514/6.1995-2818

  • Linear stability analysis of the ionization layer of a diffuse anode arc 31st Joint Propulsion Conference and Exhibit Yuan, B. P., Cappelli, M. A. 1995

    View details for DOI 10.2514/6.1995-3064

  • Stability of a near-thermal plasma in contact with an anode 26th Plasmadynamics and Lasers Conference Yuan, B. P., Cappelli, M. V. 1995

    View details for DOI 10.2514/6.1995-1991

  • NUMERICAL AND EXPERIMENTAL INVESTIGATIONS OF LOW-DENSITY SUPERSONIC JETS OF HYDROGEN JOURNAL OF FLUID MECHANICS Boyd, I. D., Beattie, D. R., Cappelli, M. A. 1994; 280: 41-67
  • DIAMOND FILM GROWTH IN LOW-PRESSURE PREMIXED ETHYLENE-OXYGEN FLAMES APPLIED PHYSICS LETTERS Kim, J. S., Cappelli, M. A. 1994; 65 (22): 2786-2788
  • IN-SITU MASS SAMPLING DURING SUPERSONIC ARCJET SYNTHESIS OF DIAMOND Cappelli, M. A., Loh, M. H. ELSEVIER SCIENCE SA. 1994: 417-421
  • 2ND-ORDER RAMAN-SCATTERING IN DIAMOND UP TO 1900 K PHYSICAL REVIEW B HERCHEN, H., Cappelli, M. A. 1994; 49 (5): 3213-3216
  • Second-order Raman scattering in diamond up to 1900 K Physical Review B Herchen, H., Cappelli, M. A. 1994; 49 (5): 3213–3216

    View details for DOI 10.1103/PhysRevB.49.3213

  • Semiconductor Laser Diagnostics for Xenon Plasmas 30th Joint Propulsion Conference and Exhibit Cedolin, R. J., Hanson, R. K., Cappelli, M. A. 1994

    View details for DOI 10.2514/6.1994-2739

  • Interior plasma diagnostics of arcjet thrusters 25th Plasmadynamics and Lasers Conference, Fluid Dynamics and Co-located Conferences Cappelli, M. A., Storm, P. V. 1994

    View details for DOI 10.2514/6.1994-2654

  • Arcjet thrusters for the synthesis of diamond and cubic-boron nitride films Loh, M. H., Liebeskind, J. G., Cappelli, M. A. 1994

    View details for DOI 10.2514/6.1994-3233

  • Axial emission measurements on a medium power hydrogen arcjet thruster 30th Joint Propulsion Conference and Exhibit Storm, P. V., Cappelli, M. A. 1994

    View details for DOI 10.2514/6.1994-2743

  • In-situ mass sampling during supersonic arcjet synthesis of diamond Diamond and Related Materials Cappelli, M. A., Loh, M. H. 1994; 3 (4–6): 417–421
  • A MULTI-FLUID STAGNATION-FLOW PLASMA MODEL WITH SELF-CONSISTENT TREATMENT OF THE COLLISIONAL SHEATH IEEE TRANSACTIONS ON PLASMA SCIENCE Meeks, E., Cappelli, M. A. 1993; 21 (6): 768-777
  • LASER-INDUCED FLUORESCENCE DIAGNOSTIC FOR TEMPERATURE AND VELOCITY-MEASUREMENTS IN A HYDROGEN ARCJET PLUME APPLIED OPTICS LIEBESKIND, J. G., Hanson, R. K., Cappelli, M. A. 1993; 32 (30): 6117-6127

    Abstract

    A diagnostic has been developed to measure velocity and translational temperature in the plume of a 1-kW-class arcjet thruster operating on hydrogen. Laser-induced fluorescence with a narrow-band cw laser is used to probe the Balmer ? transition of excited atomic hydrogen. The velocity is determined from the Doppler shift of the fluorescence excitation spectrum, whereas the temperature is inferred from the lineshape. Analysis shows that although Doppler broadening is the only significant broadening mechanism, the fine structure of the transition must be taken into account. Near the exit plane, axial velocities vary from 4 to 14 km/s, radial velocities vary from 0 to 4 km/s, and swirl velocities are shown to be relatively small. Temperatures from 1000 to 5000 K indicate high dissociation fractions.

    View details for Web of Science ID A1993MC05300035

    View details for PubMedID 20856439

  • TEMPERATURE-DEPENDENCE OF THE CUBIC BORON-NITRIDE RAMAN LINES PHYSICAL REVIEW B HERCHEN, H., Cappelli, M. A. 1993; 47 (21): 14193-14199
  • 2 PRECURSOR MODEL FOR LOW-PRESSURE CHEMICAL-VAPOR-DEPOSITION OF SILICON DIOXIDE FROM TETRAETHYLORTHOSILICATE JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B ISLAMRAJA, M. M., Chang, C., McVittie, J. P., Cappelli, M. A., Saraswat, K. C. 1993; 11 (3): 720-726
  • 2-TEMPERATURE FLUID MODEL FOR HIGH-PRESSURE PLASMAS IN CONTACT WITH COOLED ELECTRODES JOURNAL OF APPLIED PHYSICS Meeks, E., Cappelli, M. A. 1993; 73 (7): 3172-3182
  • SUPERSONIC DC-ARCJET SYNTHESIS OF DIAMOND Loh, M. H., Cappelli, M. A. ELSEVIER SCIENCE SA. 1993: 454-461
  • THE NONEQUILIBRIUM REGION OF AN ELECTRODE IN CONTACT WITH A FLOWING THERMAL PLASMA IEEE TRANSACTIONS ON PLASMA SCIENCE Cappelli, M. A. 1993; 21 (1): 194-201
  • A multi-fluid model of near-electrode plasma behavior 29th Joint Propulsion Conference and Exhibit Meeks, E., Cappelli, M. A. 1993

    View details for DOI 10.2514/6.1993-2103

  • Characterization of a supersonic hydrogen arcjet plasma thruster employed in diamond film synthesis 29th Joint Propulsion Conference and Exhibit Loh, M. H., Liebskind, J. G., Cappelli, M. A. 1993

    View details for DOI 10.2514/6.1993-2227

  • A Direct Comparison of Hydrogen Arcjet Thruster Properties to Model Predictions Cappelli, M. A., Liebeskind, J. G., Hanson, R. K., Butler, G. W., King, D. Q. 1993
  • Characterization of a supersonic hydrogen arcjet plasma thruster employed in diamond film synthesis 29th Joint Propulsion Conference and Exhibit Loh, M. H., Liebskind, J. G., Cappelli, M. A. 1993

    View details for DOI 10.2514/6.1993-2227

  • A comparison of arcjet plume properties to model predictions 31st Aerospace Sciences Meeting Cappelli, M. A., Liebeskind, J. G., Hanson, R. K., Butler, G. W., Redmond, W. A., King, D. Q. 1993

    View details for DOI 10.2514/6.1993-820

  • Temperature dependence of the cubic boron nitride Raman lines Physical Review B Herchen, H., Cappelli, M. A. 1993; 47 (21): 14193–14199
  • Plume characteristics of an arcjet thruster 29th Joint Propulsion Conference and Exhibit Liebeskind, J. G., Hanson, R. K., Cappelli, M. A. 1993

    View details for DOI 10.2514/6.1993-2530

  • Two precursor model for low‐pressure chemical vapor deposition of silicon dioxide from tetraethylorthosilicate Journal of Vacuum Science & T IslamRaja, M. M., Chang, C., McVittie, J. P., Cappelli, M. A., Sarawat, K. C. 1993; 11 (3): 720 - 726

    View details for DOI 10.1116/1.586778

  • Monte Carlo and experimental studies of nozzle flow in a low-power hydrogen arcjet 29th Joint Propulsion Conference and Exhibit Boyd, I. D., Cappelli, M. A., Beattie, D. R. 1993

    View details for DOI 10.2514/6.1993-2529

  • A MODEL OF DIAMOND GROWTH IN LOW-PRESSURE PREMIXED FLAMES JOURNAL OF APPLIED PHYSICS Kim, J. S., Cappelli, M. A. 1992; 72 (11): 5461-5466
  • DIAMOND SYNTHESIS IN SUPERSONIC DIRECT-CURRENT ARCJET PLASMA AT SUBTORR PRESSURES Loh, M. H., Cappelli, M. A. ELSEVIER SCIENCE SA. 1992: 408-413
  • 1ST-ORDER RAMAN-SCATTERING IN HOMOEPITAXIAL CHEMICAL VAPOR-DEPOSITED DIAMOND AT ELEVATED-TEMPERATURES HERCHEN, H., Cappelli, M. A., LANDSTRASS, M. I., Plano, M. A., Moyer, M. D. ELSEVIER SCIENCE SA. 1992: 206-215
  • DEVELOPMENT OF DESIGN RULES FOR RELIABLE TUNGSTEN PLUGS USING SIMULATIONS 30TH ANNUAL PROCEEDINGS : RELIABILITY PHYSICS 1992 ISLAMRAJA, M. M., BARIYA, A. J., Saraswat, K. C., Cappelli, M. A., McVittie, J. P., MOBERLY, L., LAHRI, R. 1992: 8-10
  • Flow diagnostics of an arcjet using laser-induced fluorescence 28th Joint Propulsion Conference and Exhibit Liebeskind, J. G., Hanson, R. K., Cappelli, M. A. 1992

    View details for DOI 10.2514/6.1992-3243

  • Laser-induced fluorescence of atomic hydrogen in an arcjet thruster 30th Aerospace Sciences Meeting and Exhibit Liebeskind, J. G., Hanson, R. K., Cappelli, M. A. 1992

    View details for DOI 10.2514/6.1992-678

  • Molecular hydrogen Raman scattering in a low power arcjet thruster 28th Joint Propulsion Conference and Exhibit Beattie, D. R., Cappelli, M. A. 1992

    View details for DOI 10.2514/6.1992-3566

  • Supersonic dc-arcjet plasma at subtorr pressures as a medium for diamond film synthesis 28th Joint Propulsion Conference and Exhibit Loh, M. H., Cappelli, M. A. 1992

    View details for DOI 10.2514/6.1992-3534

  • Modeling of the near-electrode regions of arcjets. I-Coupling of the flowfield to the non-equilibrium boundary layers 28th Joint Propulsion Conference and Exhibit Cappelli, M. A. 1992

    View details for DOI 10.2514/6.1992-3109

  • Vacuum ultraviolet absorption in a hydrogen arcjet 28TH JOINT PROPULSION CONFERENCE AND EXHIBIT Manzella, D. H., Cappelli, M. A. 1992

    View details for DOI 10.2514/6.1992-3564

  • A 3-DIMENSIONAL MODEL FOR LOW-PRESSURE CHEMICAL-VAPOR-DEPOSITION STEP COVERAGE IN TRENCHES AND CIRCULAR VIAS JOURNAL OF APPLIED PHYSICS ISLAMRAJA, M. M., Cappelli, M. A., McVittie, J. P., Saraswat, K. C. 1991; 70 (11): 7137-7140
  • 1ST-ORDER RAMAN-SPECTRUM OF DIAMOND AT HIGH-TEMPERATURES PHYSICAL REVIEW B HERCHEN, H., Cappelli, M. A. 1991; 43 (14): 11740-11744
  • HIGH-TEMPERATURE RAMAN-SCATTERING BEHAVIOR IN DIAMOND DIAMOND OPTICS IV HERCHEN, H., Cappelli, M. A. 1991; 1534: 158-168
  • Velocity measurements in a hydrogen arcjet using LIF AIAA/SAE/ASME/ASEE 27th Joint Propulsion Conference Liebeskind, J. G., Hanson, R. K., Cappelli, M. A. 1991

    View details for DOI 10.2514/6.1991-2112

  • Optical diagnostics of a low power hydrogen arcjet International Electric Cappelli, M. A., Hanson, R. K., Liebeskind, J. G., Manzella, D. H. 1991
  • DIAMOND SYNTHESIS IN A 50 KW INDUCTIVELY COUPLED ATMOSPHERIC-PRESSURE PLASMA TORCH PLASMA PROCESSING AND SYNTHESIS OF MATERIALS III Owano, T. G., Kruger, C. H., Cappelli, M. A. 1991; 190: 131-136
  • DIAMOND SYNTHESIS IN A 50-KW INDUCTIVELY COUPLED ATMOSPHERIC-PRESSURE PLASMA TORCH NEW DIAMOND SCIENCE AND TECHNOLOGY Owano, T. G., Goodwin, D. G., Kruger, C. H., Cappelli, M. A. 1991: 497-502
  • ON THE DEVELOPMENT OF INSITU RAMAN ANALYSIS FOR PLASMA DEPOSITED DIAMOND NEW DIAMOND SCIENCE AND TECHNOLOGY Cappelli, M. A., HERCHEN, H. 1991: 225-231
  • HIGH GROWTH-RATE DIAMOND SYNTHESIS IN A LARGE AREA ATMOSPHERIC-PRESSURE INDUCTIVELY COUPLED PLASMA JOURNAL OF MATERIALS RESEARCH Cappelli, M. A., Owano, T. G., Kruger, C. H. 1990; 5 (11): 2326-2333
  • LASER-INDUCED FLUORESCENCE IMAGING OF LASER-ABLATED BARIUM APPLIED PHYSICS LETTERS Cappelli, M. A., Paul, P. H., Hanson, R. K. 1990; 56 (18): 1715-1718
  • AN INVESTIGATION OF DIAMOND FILM DEPOSITION IN A PREMIXED OXYACETYLENE FLAME JOURNAL OF APPLIED PHYSICS Cappelli, M. A., Paul, P. H. 1990; 67 (5): 2596-2602
  • An investigation of diamond synthesis in an oxygen-acetylene diffusion flame Cappelli, M., A. 1990
  • First Order Raman Spectrum of Diamond at High Temperatures STANFORD UNIV CA HIGH TEMPERATURE GASDYNAMICS LAB Herchen, H., Cappelli, Mark, A. 1990: 22
  • Development of optical diagnostics for performance evaluation of arcjet thrusters Final Report, High Temperature Gasdynamics Lab. Cappelli, Mark, A. 1989
  • ELECTRON-DENSITY RADIAL PROFILES DERIVED FROM STARK-BROADENING IN A SODIUM PLASMA PRODUCED BY LASER RESONANCE SATURATION APPLIED OPTICS Cappelli, M. A., Measures, R. M. 1987; 26 (6): 1058-1067

    Abstract

    The first free electron density radial profiles of a sodium plasma created by laser resonance saturation are reported. The measurements were based on Stark broadening, of the 4(2)D-3(2)P multiplet and reveal the formation of a conically shaped plasma along the path of the laser pulse, which can be attributed to strong absorption of the laser pulse along the ionization path.

    View details for Web of Science ID A1987G929900019

    View details for PubMedID 20454270

  • Laser resonance saturation Advances in Laser Science-I Measures, R. M., Cappelli, M. A., Kissack, R. S., Wong, S. K. 1986: 658-663

    View details for DOI 10.1063/1.35819

  • SODIUM ATOM DISTRIBUTION WITHIN A HEAT SANDWICH OVEN REVIEW OF SCIENTIFIC INSTRUMENTS Cappelli, M. A., CARDINAL, P. G., HERCHEN, H., Measures, R. M. 1985; 56 (11): 2030-2034
  • 2-CHANNEL TECHNIQUE FOR STARK MEASUREMENTS OF ELECTRON-DENSITY WITHIN A LASER-PRODUCED SODIUM PLASMA APPLIED OPTICS Cappelli, M. A., Measures, R. M. 1984; 23 (13): 2107-2114

    View details for Web of Science ID A1984SY73300020

    View details for PubMedID 18212956