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Journal Publications

In Review:

  1. Frieman, J. Walker, M. L. R., "Background Flow Model Evaluation of SPT-100 HET Facility Effects," Journal of Propulsion and Power, November 2017. - In Review.
  2. Walker, J. A., Walker, M. L. R., Khayms, V., King, D., Peterson, P., “Time-Delay of Electrical Signals in a Hall Current Thruster Testing Environment,” Journal of Propulsion and Power, August 2016. – In Review.
  3. Lake Singh, Mitchell Walker, "Sensitivity Analysis of Propellant Collection Physics," Journal of Spacecraft and Rockets, August 2014. - In Review.

Accepted:

  1. Levchenko, I., Xu, S., Walker, M. L. R., Keidar, M., “Nano in Space: Big Expectations from Advanced Nanoscaled Materials,” Nature Communications, November 2017. – Accepted.
  2. Averett, R., Scogin, T., Walker, M. L. R., “Electromagnetically Induced Distortion of a Fibrin Matrix with Embedded Microparticles,” Journal of Mechanics in Medicine and Biology, October 2017. – Accepted.
  3. Frieman, J. D., Brown, N. P., Liu, C., Liu, T., Walker, M. L. R., Khayms, V., King, D., “Impact of Propellant Species on Hall Effect Thruster Electrical Facility Effects,” Journal of Propulsion and Power, September 2017. – Accepted.
  4. Frieman, J. D., Brown, N. P., Liu, C. Y., Liu, T. M., Walker, M. L. R., Khayms, V., King, D. Q., “Electrical Facility Effects on Faraday Probe Measurements,” Journal of Propulsion and Power, May 2017. – Accepted.
  5. Caruso, N., Walker, M. L. R., “Neutral Particle Ingestion Effects on Helicon Ion Thruster Plasma Plume Properties,” Journal of Propulsion and Power, February 2017. - Accepted..

Published:

  1. Frieman, J. D., Liu, T. M., Walker, M. L. R., “Background Flow Model of Hall Thruster Neutral Ingestion,” Journal of Propulsion and Power, September-October 2017, pp. 1087-1101.
  2. Saleh, S. H., Geng, F., Ku, M., Walker, M. L. R., “Electric Propulsion Reliability:  Statistical Analysis of On-orbit Anomalies and Comparative Analysis of Electric versus Chemical Propulsion Failure Rates,” Acta Astronautica, (139) July 2017, pp. 141-156.
  3. Jay Polk, Anthony Pancotti, Thomas Haag, Scott King, Mitchell Walker, Joseph Blakely, John Ziemer, “Recommended Practices in Thruster Measurements,” Journal of Propulsion and Power, Volume 33, Number 3, May-June 2017, pp. 539-555.
  4. Daniel Brown, Mitchell Walker, James Szabo, Wensheng Huang, “Faraday Probes for Solar Electric Propulsion: Guidelines and Recommended Practices,” Journal of Propulsion and Power, Volume 33, Number 3, May-June 2017, pp. 582-613.
  5. John Dankanich, Mitchell Walker, Michael Swiatek, John Yim, “Recommended Practice for Pressure Measurements and Calculation of Effective Pumping Speeds during Electric Propulsion Testing,” Journal of Propulsion and Power, Volume 33, Number 3, May-June 2017, pp. 668-680.
  6. Steve Snyder, Jason Frieman, Mitchell Walker, “Flow Control and Measurement in Electric Propulsion Systems,” Journal of Propulsion and Power, Volume 33, Number 3, May-June 2017, pp. 5556-564.
  7. Schinder, A., Rimoli, J., Walker, M. L. R., “Investigation of Plasma Material Erosion Under Mechanical Stress,” Journal of Propulsion and Power, Volume 33, Number 2, March-April 2017, pp. 433-447.
  8. Walker, J. A., Langendorf, S. J., Walker, M. L. R., “Electrical Facility Effects on Hall Current Thrusters: Electron Termination Pathway Manipulation,” Journal of Propulsion and Power, Volume 32, Number 6, November-December 2016, pp. 1365-1377.
  9. Walker, J. A. Frieman, J. D., Khayms, V., Peterson, P. Y., King, D., Walker, M. L. R., “Electrical Facility Effects on Hall Effect Thruster Cathode Coupling: Discharge Oscillations and Facility Coupling,” Journal of Propulsion and Power, Volume 32, Number 4, July-August 2016, pp. 844-855.
  10. Langendorf, S. J., Walker, M. L. R., "Hysteresis and Mode Transitions in Plasma Sheath Collapse Due to Secondary Electron Emission," Journal of Applied Physics, Volume 119, March 2016, pp. 113305 1-5.
  11. Frieman, J. D., Walker, J., A., Khayms, V., King, D. Q., Walker, M. L. R., “Electrical Facility Effects on Hall Effect Thruster Cathode Coupling – Performance and Plume Properties,” Journal of Propulsion and Power, Volume 32, Number 1, January-February 2016, pp. 251-264.
  12. Walker, J, A., Langendorf, S., Walker, M. L. R., Polzin, P., Kimberlin, “Velocimetry of Cathode Particles in a Magnetoplasmadynamic Thruster Discharge Plasma,” Review of Scientific Instruments, Volume 86, Number 7, July 2015, pp. 073513 1-10.
  13. Williams, L. T., Walker, M. L. R., “Plume Structure and Ion Acceleration of a Helicon Plasma Source,” IEEE Transactions on Plasma Science, Volume 43, Number 5, May 2015, pp. 1694-1705.
  14. Lake Singh, Mitchell Walker, “A Review of Research in Low Earth Orbit Propellant Collection,” Progress in Aerospace Sciences, Volume 75, April 2015, Pages 15-25.
  15. Samuel Langendorf, Mitchell Walker, “Effect of Secondary Electron Emission on the Plasma Sheath,” Physics of Plasmas, March 2015, Vol. 22, 033515 (2015).
  16. Samuel Langendorf, Kunning Xu, Mitchell Walker, “Effects of wall electrodes on Hall effect thruster plasma,” Physics of Plasmas, February 2015, Vol. 22, No 2, 023508.
  17. Irina Schweigert, Samuel Langendorf, Mitchell Walker, Michael Keidar, “Sheath structure transition controlled by secondary electron emission,” Plasma Sources Science and Technology, February 2015, Vol. 24, No. 2, 025012.
  18. Lake Singh, Graham Sanborn, Stephan Turano, Mitchell Walker, Jud Ready, “Operation of a Carbon Nanotube Field Emitter Array in a Hall Effect Thruster Plume Environment,” IEEE Transactions on Plasma Science Special Issue - Plasma Propulsion, Volume 43, Issue 1, January 2015. pp. 95-102.
  19. Jason Frieman, Scott King, Mitchell Walker, Vadim Khayms, David King, “Role of a Conducting Chamber in the Hall Effect Thruster Electrical Circuit,” Journal of Propulsion and Power, Volume 30, Number 6, November-December 2014, pp. 1471-1479.
  20. Aaron Schinder, Mitchell Walker, Julian Rimoli, “3D Model for Erosion of a Hall Effect Thruster Discharge Channel Wall,” Journal of Propulsion and Power, Volume 30, Number 5, September-October 2014, pg. 1373-1382.
  21. Kwon, K., Walker, M. L. R., Mavris, D. N., “Study on Anomalous Electron Diffusion in the Hall Effect Thruster,” International Journal of Aeronautical & Space Sciences, Volume 15, Number 3, September 2014, pp. 320-334.
  22. Scott King, Mitchell Walker, Silvio Chianese, “Atmospheric Electric Propulsion Mission Performance Tool,” Journal of Spacecraft and Rockets, May-June 2014, Volume 51, Issue 3, pp. 931-937.
  23. Logan Williams, Mitchell Walker, “Initial Performance Evaluation of a Gridded Radio Frequency Ion Thruster,” Journal of Propulsion and Power, Volume 30, Number 3, May-June 2014, pp. 645-655.
  24. Thomas Burton, Aaron Schinder, German Capuano, Julian Rimoli, Mitchell Walker, Gregory Thompson, “Plasma-Induced Erosion on Ceramic Wall Structures in Hall-Effect Thrusters,” Journal of Propulsion and Power, Volume 30, Number 3, May-June, 2014, pp. 690-695.
  25. Kunning Xu, Mitchell Walker, "Effect of External Cathode Azimuthal Position on Hall Effect Thruster Plume," Journal of Propulsion and Power, Vol. 30, No. 2, March–April 2014.
  26. Rafael Martinez, Hoang Dao, Mitchell Walker, “Power Deposition into the Discharge Channel of a Hall Effect Thruster,” Journal of Propulsion and Power, Vol. 30, No. 1, January–February 2014, pp. 209-220.
  27. Logan Williams, Mitchell Walker, “Ion Production Cost of a Gridded Helicon Ion Thruster,” Plasma Sources Science and Technology, Volume 22, Number 5, October 2013, pp. 055019.
  28. Lake Singh, Mitchell Walker, “Charge Exchange Interactions on Near-Earth Proton Radiation for Orbit Perturbation of High Area-to-Mass Ratio Objects,” Advances in Space Research, Volume 52, Issue 3, 1 August 2013, pp. 496–504.
  29. Sebastiano Giannelli, Alexander Kieckhafer, Mitchell Walker, "Neutral Gas Expansion in a Cylindrical Helicon Discharge Chamber," Journal of Propulsion and Power, Vol. 29, No. 3, May–June 2013, pp. 540-546.
  30. Logan Williams, Mitchell Walker, “Thrust Measurements of a RF Plasma Source," Journal of Propulsion and Power, Vol. 29, No. 3, May–June 2013, pp. 520-527.
  31. Rafael Martinez, Mitchell Walker, “Propellant Thermal Management Effect on Neutral Residence Time in Low-Voltage Hall Thrusters,” Journal of Propulsion and Power, Vol. 29, No. 3, May–June 2013, pp. 528-539.
  32. Samuel Langendorf, Mitchell Walker, “Characterization of Hall Effect Thruster Propellant Distributors with Flame Visualization,” Review of Scientific Instruments, Volume 84, Number 1, January 2013, pp. 013302 1-7.
  33. Mitchell Walker, Ryan Russell, Lake Singh, “Utilization of Residual Helium to Extend Satellite Lifetimes and Mitigate Space Debris," Journal of Propulsion and Power, Volume 28, Number 6, November–December 2012, pp. 1406-1412.
  34. Kunning Xu, Hoang Dao, Mitchell Walker, "Potential Contour Shaping and Sheath Behavior with Wall Electrodes and Near-Wall Magnetic Fields in a Hall Thruster," Phys. Plasmas Volume 19, Number 10, October 2012, pp. 103502 1-6.
  35. Kunning Xu, Mitchell Walker, Plume Characterization of an Ion Focusing Hall Thruster,” Journal of Propulsion and Power, Volume 28, Number 5, September-October, 2012, pp. 1105-1115.
  36. Kybeom Kwon, Mitchell Walker, Dmitri Mavris, Self-Consistent, One-dimensional Analysis of the Hall Effect Thruster,” Plasma Sources Science and Technology, Volume 20, Number 4, July 2011, pp. 045021 1-15.
  37. Kunning Xu, Mitchell Walker, Technique to Collimate Ions in a Hall Effect Thruster Discharge Chamber,” Journal of Propulsion and Power, Volume 27, Number 3, May-June 2011, pp. 564-572.
  38. Carl Book, Mitchell Walker,Effect of Anode Temperature on Hall Effect Thruster Performance,” Journal of Propulsion and Power, Volume 26, Number 5, September-October 2010, pp. 1036-1044.
  39. Logan Williams, Mitchell Walker, Victor Kumsomboone, Jud Ready,Lifetime and Failure Mechanisms of an Arrayed Carbon Nanotube Field Emission Cathode,” IEEE Transactions on Electron Devices, Volume 57, No. 11, August 2010, pp. 3163-3168.
  40. Alexander Kieckhafer, Mitchell Walker, RF Power System for Thrust Measurements of a Helicon Plasma Source,” Review of Scientific Instruments, Volume 81, Issue 7, July 2010, pp. 075106 1-8.
  41. Doug Palmer, Mitchell Walker, "Operation of an Annular Helicon Plasma Source," Journal of Propulsion and Power, Volume 25, Number 5, September-October 2009, pp. 1013-1019.
  42. Kunning Xu, Mitchell Walker, High-Power, Null-Type, Inverted Pendulum Thrust Stand,” Review of Scientific Instruments, Volume 80, Number 5, May 2009, pp. 055103 1-6.
  43. Mitchell Walker, Alec Gallimore,Hall Thruster Cluster Operation with a Shared Cathode,” Journal of Propulsion and Power, Volume 23, Number 3, May–June 2007, pp. 528-536.
  44. Masayuki Yano, Mitchell Walker, Generalized Theory of Annularly-Bounded Helicon Waves,” Physics of Plasmas, Volume 14, Number 3, March 2007, pp. 033510 1-7.
  45. Mitchell Walker, Alec Gallimore, Performance Characteristics of a Cluster of 5-kW Laboratory Hall Thrusters,” Journal of Propulsion and Power, Volume 23, Number 1, January-February 2007, pp. 35-43.
  46. Masayuki Yano, Mitchell Walker, Plasma Ionization by Annularly-Bounded Helicon Waves,” Physics of Plasma, Volume 13, Number 6, June 2006, pp. 063501 1-5.
  47. Mitchell Walker, Richard Hofer, Alec Gallimore, "Ion Collection in Hall Thruster Plumes," Journal of Propulsion and Power, Volume 22, Number 1, January-February 2006, pp. 205-209.
  48. Joshua Rovey, Mitchell Walker, Peter Peterson, Alec Gallimore, A Magnetically-Filtered Faraday Probe for Measuring the Ion Current Density Profile of a Hall Thruster,” Review of Scientific Instruments, Volume 77, Number 1, January 2006, pp. 013503 1-8.
  49. Mitchell Walker, Alan Victor, Richard Hofer, Alec Gallimore, "Effect of Backpressure on Ion Current Density Measurements in Hall Thruster Plumes," Journal of Propulsion and Power, Volume 21, Number 3, May-June 2005, pp. 408-415.
  50. Mitchell Walker, Alec Gallimore, "Neutral Density Map of Hall Thruster Plume Expansion in a Vacuum Chamber," Review of Scientific Instruments, Volume 76, Number 5, May 2005, pp. 053509 1-10.
  51. Mitchell Walker, Alec Gallimore, Chunpei Cai, Ian Boyd, "Vacuum Chamber Pressure Maps of a Hall Thruster Cold Flow Expansion," Journal of Propulsion and Power, Volume 20, Number 6, November–December 2004, pp. 1127-1131.
  52. Ian Boyd, Chunpei Cai, Mitchell Walker, Alec Gallimore, Computation of Neutral Gas Flow of a Hall Thruster into a Vacuum Chamber,” Peer-reviewed Proceedings of the 23rd International Conference on Rarefied Gas Dynamics, Whistler, BC, Canada, Aug. 2002, 123-133.

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Conference Papers

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  1. Schweigert, I., Burton, T. S., Thompson, G. B., Langendorf, S., Walker, M. L. R., Keidar, M., “Transition in Sheath Structure Near Emissive Grooved Surface in Discharge Plasma Controlled by Electron Beam,” 70th Annual Gaseous Electronics Conference, Pittsburgh, Pennsylvania, November 6-10, 2017.
  2. Bogorad, A. L., August, K., Lichtin, D., Pytel, J., Payne, K., Herschitz, R., Chad, S., Capots, L., Noakes, B., Dubisher, R., Walker, M. L. R., Mendez Ramos, E. D., Walker, J., Prestridge, N., “Interaction of Spacecraft Arcjet Power Subsystem with Combined On orbit Environments and Electric Propulsion Plume: Ground Test Results,” IEPC-2017-225, 35th International Electric Propulsion Conference, Atlanta, Georgia, October 8-12, 2017.
  3. Frieman, J. D., Liu, T. M., Walker, M. L. R., “Development of Background Flow Model of Hall Thruster Neutral Ingestion,” IEPC-2017-008, 35th International Electric Propulsion Conference, Atlanta, Georgia, October 8-12, 2017.
  4. Cohen, M. B., Thompson, L., Opalinski, N., Singletary, P., Walker, M. L. R., Chan, C., Golkowski, M., “Broadband Electrically Short Transmitters via Hi-Speed Time-Varying Antenna Properties,” 2017 IEEE AP-S Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, San Diego, CA, July 9-14, 2017.
  5. Frieman, J. D., Brown, N. P., Liu, C. Y., Liu, T. M., Walker, M. L. R., Khayms, V., King, D. Q., “Electrical Facility Effects on the Operation of a Low-Power Hall Effect Thruster,” JANNAF Propulsion Meeting, Phoenix, AZ, December 5-8, 2016.
  6. Frieman, J. D., Brown, N. P., Liu, C. Y., Liu, T. M., Walker, M. L. R., Khayms, V., King, D. Q., “Impact of Propellant Selection on Hall Effect Thruster Electrical Facility Effects,” JANNAF Propulsion Meeting, Phoenix, AZ, December 5-8, 2016.
  7. Frieman, J. D., Liu, T. M., Walker, M. L. R., Makela, J., Mathers, A., Peterson, P. Y., “Performance Evaluation of the T-40 Low-Power Hall Current Thruster,” AIAA/SAE/ASEE 52nd Joint Propulsion Conference and Exhibit, Salt Lake City, Utah, July 25-27, 2016.
  8. Schinder, A. M., Rimoli, J. J., Walker, M. L. R., “Plasma Erosion of Stressed Fused Silica and M26 Borosil,” AIAA/SAE/ASEE 52nd Joint Propulsion Conference and Exhibit, Salt Lake City, Utah, July 25-27, 2016.
  9. Schweigert, I., Langendorf, S., Walker, M. L. R., Keidar, M., “Plasma-Wall Interaction Controlled by Secondary Electron Emission,” IEPC-2015-343, 34th International Electric Propulsion Conference, Kobe-Hyogo, Japan, July 4-10, 2015.
  10. Park, C-S., Walker M. L. R., Kim, S-O., “Flexible microplasma thrusters using jet-to-jet coupling effect”, The 8th International Workshop on Microplasmas (IWM 2015), Seton Hall University, Newark, NJ, May 11 – 15, 2015.
  11. Natalie Schloeder, Tyler Scogin, Thomas Liu, Mitchell Walker, Kurt Polzin, John Dankanich, Anne Aanesland, “Initial Thrust Measurements of Marshall’s Ion-Ion Thruster,” 51st Joint Propulsion Conference and Exhibit, Orlando, FL, July 27-29, 2015.
  12. Jonathan Walker, Samuel Langendorf, Mitchell Walker, Vadim Khayms, “Electrical Facility Effects on Hall Effect Thrusters: Electron Termination Pathway Manipulation through the Bias of a Downstream Electrode,” 62nd JANNAF Propulsion Meeting, Nashville, TN, June 1-15, 2015.
  13. Irina Schweigert, Samuel Langendorf, Michael Keidar, Mitchell Walker, “Sheath Structure Transition Controlled by Secondary Electron Emission at Low Gas Pressure,” 67th Annual Gaseous Electronics Conference, Raleigh, NC, November 2-7, 2014.
  14. Natalie Schloeder, Thomas Liu, Kurt Polzin, John Dankanich, Anne Aanesland, Mitchell Walker, “Design and Preliminary Performance Testing of Electronegative Gas Plasma Thruster,” 50th Joint Propulsion Conference and Exhibit, Cleveland, OH, July 28-30, 2014.
  15. Natalie Schloeder, Jason Frieman, Mitchell Walker, “Facility Effects on Helicon Plasma Source Operation,” 50th Joint Propulsion Conference and Exhibit, Cleveland, OH, July 28-30, 2014.
  16. Samuel Langendorf, Mitchell Walker, “Effects of Wall Material, Wall Temperature, and Surface Roughness on Plasma Sheath,” 50th Joint Propulsion Conference and Exhibit, Cleveland, OH, July 28-30, 2014.
  17. Jonathan Walker, Jason Frieman, Vadim Khayms, Mitchell Walker, “Hall Effect Thruster Electrical Interaction with a Conductive Vacuum Chamber,” 50th Joint Propulsion Conference and Exhibit, Cleveland, OH, July 28-30, 2014.
  18. Jason Frieman, Scott King, Vadim Khayms, Mitchell Walker, “Preliminary Assessment of the Role of a Conducting Chamber in Hall Effect Thruster Electrical Circuit,” 50th Joint Propulsion Conference and Exhibit, Cleveland, OH, July 28-30, 2014.
  19. Samuel Langendorf, Mitchell Walker, "Effects of Wall Material and Surface Roughness on the Plasma Sheath," 41st IEEE International Conference on Plasma Science, Washington DC, USA, May 25–29, 2014.
  20. Thomas Burton, Gregory Thompson, Mitchell Walker, Julian Rimoli, Aaron Schinder, German Capuano, "Microstructural Characterization of Eroded M26 HET Thruster Wall," TMS 2014 143rd Annual Meeting and Exhibition, San Diego, CA, February 16-20, 2014.
  21. John Dankanich, Mitchell Walker, Michael Swiatek, John Yim, “Recommended Practice for Pressure Measurements and Calculation of Effective Pumping Speeds during Electric Propulsion Testing,” 33rd International Electric Propulsion Conference, Washington, D.C., October 6-10, 2013.
  22. Thomas Liu, Mitchell Walker, “Integration of Electric Propulsion Systems with Spacecraft – An Overview,” 33rd International Electric Propulsion Conference, Washington, D.C., October 6-10, 2013.
  23. Lake Singh, Mitchell Walker, Graham Sanborn, Stephan Turano, Jud Ready, “Operation of Spindt-Type Carbon Nanotube Cold Cathodes in a Hall Effect Thruster Environment,” 33rd International Electric Propulsion Conference, Washington, D.C., October 6-10, 2013.
  24. Jason Frieman, Mitchell Walker, Steve Snyder, “Guide to Flow Measurement for Electric Propulsion Systems,” 33rd International Electric Propulsion Conference, Washington, D.C., October 6-10, 2013.
  25. Daniel Brown, Mitchell Walker, James Szabo, “Test Methodology and Analysis of Faraday Probes with Application to Plasma Plumes for Spacecraft Electric Propulsion,” 33rd International Electric Propulsion Conference, Washington, D.C., October 6-10, 2013.
  26. Jay Polk, Anthony Pancotti, Mitchell Walker, Thomas Haag, Joseph Blakely, John Ziemer, “Recommended Practices in Thrust Measurements,” 33rd International Electric Propulsion Conference, Washington, D.C., October 6-10, 2013.
  27. Samuel Langendorf, Mitchell Walker, Laura Rose, Lubos Brieda, Michael Keidar, “Effect of ion-neutral collisions on sheath potential profile,” 33rd International Electric Propulsion Conference, Washington, D.C., October 6-10, 2013.
  28. Jonathan Walker, Samuel Langendorf, Mitchell Walker, Kurt Polzin, Adam Kimberlin, “High-Speed Imaging of the First Kink Mode Instability in a Magnetoplasmadynamic Thruster,” 33rd International Electric Propulsion Conference, Washington, D.C., October 6-10, 2013.
  29. Aaron Schinder, Mitchell Walker, Julian Rimoli, “3D Model for Atomic Sputtering of Heterogeneous Ceramic Compounds,” 49th Joint Propulsion Conference and Exhibit, San Jose, CA, July 15-17, 2013.
  30. Samuel Langendorf, Mitchell Walker, Laura Rose, Michael Keidar, Lubos Brieda, “Wall Material Effects on Sheath Potential Profile,” 49th Joint Propulsion Conference and Exhibit, San Jose, CA, July 15-17, 2013.
  31. Kunning Xu, Mitchell Walker, "Potential Contours in Ion Focusing Thruster,” 48th Joint Propulsion Conference & Exhibit, Atlanta, GA, July 2012.
  32. Lake Singh, Mitchell Walker, “Orbit Perturbation of High Area-to-Mass Objects with High-Energy Neutrals from Charge Exchange Collisions with Near-Earth Protons,” 39th COSPAR Scientific Assembly, Mysore, India, July 2012.
  33. Robert Hoyt, Jonathan Wrobel, Jonathan Walker, Samuel Langendorf, Mitchell Walker, “Thrust Performance of an MPD Thruster with a Ring-Cusp Magnetic Nozzle,” JANNAF Propulsion Meeting, Huntsville, AL, December 5-8, 2011.
  34. Alexander Kieckhafer, Mitchell Walker, Recirculating Liquid Nitrogen System for Operation of Cryogenic Pumps,” 32nd International Electric Propulsion Conference, Hamburg, Germany, September 2011.
  35. Kunning Xu, Mitchell Walker, Plume Characterization of an Ion Focusing Hall Thruster,” 47th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit 31 July - 03 August 2011, San Diego, California.
  36. Logan Williams, Mitchell Walker, Thrust Measurements of a Helicon Plasma Source 47th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit 31 July - 03 August 2011, San Diego, California.
  37. Scott King, Mitchell Walker, Ambient Atmosphere Ion Thruster Proof-of-concept Modeling,” 47th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit 31 July - 03 August 2011, San Diego, California.
  38. Kybeom Kwon, Dmitri Mavris, Mitchell Walker, "A New Approach for Numerical Analysis of Hall Thrusters," AIAA-2010-6523, 46th Joint Propulsion Conference, Nashville, TN, July 25-28, 2010.
  39. Kunning Xu, Mitchell Walker, "Evaluation of Technique to Focus Ions in Hall Effect Thruster Discharge Chamber," JANNAF Propulsion Meeting, Colorado Springs, CO, May 3-7, 2010.
  40. Logan Williams, Mitchell Walker, Victor Kumsomboone, Jud Ready, Experimental Characterization of Carbon Nanotube Cold Cathode Lifetime Operation, 45th Joint Propulsion Conference, Denver, CO, August 2-5, 2009.
  41. John Carlsson, Danielle Pavarin, Mitchell Walker, "Analytic Wave Solution with Helicon and Trivelpiece-Gould Modes in an Annular Plasma," B61, 18th Topical Conference on Radio Frequency Power in Plasmas, Gent, Belgium, June 24-26, 2009.
  42. Logan Williams, Mitchell Walker, Experimental Characterization of a Carbon Nanotube Field Emission Cathode, AIAA-2008-5015, 44th Joint Propulsion Conference, Hartford, CT, July 20-23, 2008.
  43. Doug Palmer, Mitchell Walker, Performance of an Annular Helicon Plasma Source, AIAA-2008-4926, 44th Joint Propulsion Conference, Hartford, CT, July 20-23, 2008.
  44. Doug Palmer, Mitchell Walker, Marco Manente, John Carlsson, Christina Bramanti, Danielle Pavarin, Performance Analysis of a Medium-Power Helicon Thruster, AIAA-2008-4925, 44th Joint Propulsion Conference, Hartford, CT, July 20-23, 2008.
  45. Danielle Pavarin, Marco Manente, Mitchell Walker, Doug Palmer, John Carlsson, Christina Bramanti, Enrico Lorenzini, Feasibility Study of a Medium-Power Helicon Thruster, AIAA-2008-4927, 44th Joint Propulsion Conference, Hartford, CT, July 20-23, 2008.
  46. Scott King, Mitchell Walker, Craig Kluever, Small Satellite LEO Maneuvers with Low-Power Electric Propulsion, AIAA-2008-4516, 44th Joint Propulsion Conference, Hartford, CT, July 20-23, 2008.
  47. Doug Palmer, Mitchell Walker, Marco Manente, John Carlsson, Christina Bramanti, Danielle Pavarin, Experimental Analysis of Low-Power Helicon Thruster, 5th International Spacecraft Propulsion Conference, Crete, Greece, May 5-9, 2008.
  48. Marco Manente, Mitchell Walker, John Carlsson, Christina Bramanti, Danielle Pavarin, Feasibility Study of Low-Power Helicon Thruster, 5th International Spacecraft Propulsion Conference, Crete, Greece, May 5-9, 2008.
  49. Doug Palmer, Cengiz Akinli, Mitchell Walker, Characterization of an Annular Helicon Plasma Source, IEPC-2007-202, International Electric Propulsion Conference, Florence, Italy, September 17-20, 2007.
  50. Cengiz Akinli, Doug Palmer, Mitchell Walker, “Comparison of the Theoretical and Experimental Performance of an Annular Helicon Plasma Source, IEPC-2007-236, International Electric Propulsion Conference, Florence, Italy, September 17-20, 2007.
  51. Robert Stubbers, Brian Jurczyk, Joshua Rovey, Mitchell Walker, Darren Alman, Matthew Coventry, Compact Toroid Formation Using an Annular Helicon Preionization Source, AIAA-2007-5307, 43rd Joint Propulsion Conference, Cincinnati, OH, July 8-11, 2007.
  52. Masayuki Yano, Logan Williams, Mitchell Walker Design and Operation of an Annular Helicon Plasma Source, AIAA-2007-5309, 43rd Joint Propulsion Conference, Cincinnati, OH, July 8-11, 2007.
  53. James Gilland, Mitchell Walker, Eric Pencil, "Thrust Stand for Applied Field MPD Thrusters", IEPC-2005-215, 29th International Electric Propulsion Conference, Princeton, NJ, Oct. 31-Nov. 4, 2005.
  54. Mitchell Walker, Alec Gallimore, "Performance Characteristics of a Cluster of 5 kW Laboratory Hall Thrusters," AIAA-2004-3767, 40th Joint Propulsion Conference, Fort Lauderdale, FL, July 11-14, 2004.
  55. Joshua Rovey, Mitchell Walker, Alec Gallimore, Peter Peterson, "Evaluation of a Magnetically-Filtered Faraday Probe for measuring the ion current density profile of a Hall thruster," AIAA-2004-3948, 40th Joint Propulsion Conference, Fort Lauderdale, FL, July 11-14, 2004.
  56. Mitchell Walker, Alec Gallimore, "Hot Flow Pressure Map of a Vacuum Facility as a Function of Flow Rate to Study Facility Effects," IEPC-0077-03, 28th International Electric Propulsion Conference, Toulouse, France, March 17-21, 2003.
  57. Mitchell Walker, Alec Gallimore, Chunpei Cai, Ian Boyd, "Pressure Map of a Facility as a Function of Flow Rate to Study Facility Effects," AIAA-2002-3815, 38th Joint Propulsion Conference, Indianapolis, IN, July 7-10, 2002.
  58. Mitchell Walker, Richard Hofer, Alec Gallimore, "The Effects of Nude Faraday Probe Design and Vacuum Facility Backpressure on the Measured Ion Current Density Profile of Hall Thruster Plumes," AIAA-2002-4253, 38th Joint Propulsion Conference, Indianapolis, IN, July 7-10, 2002.
  59. Richard Hofer, Mitchell Walker, Alec Gallimore, "A Comparison of Nude and Collimated Faraday Probes for Use with Hall Thrusters," IEPC-01-020, 27th International Electric Propulsion Conference, Pasadena, CA, October 15-19, 2001.

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Doctoral Dissertations

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  1. Jason Frieman, "Characterization of Background Neutral Flows in Vacuum Test Facilities and Impacts on Hall Effect Thruster Operation," April 2017.
  2. Jonathan Walker, "Electrical Facility Effects on Hall Effect Thruster Operation," November 2016.
  3. Aaron Schinder, "Investigation of Hall Effect Thruster Channel Wall Erosion Mechanisms," August 2016.
  4. Natalie (Schloeder) Caruso, "Facility Effects On Helicon Thruster Operation," March 2016.
  5. Samuel Langendorf, "Effects of Electron Emission on Plasma Sheaths," October 2015.
  6. Lake Singh, "Very Low Earth Orbit Propellant Collection Feasibility Assessment," September 2014.
  7. Logan Williams, "Ion Acceleration Mechanisms of Helicon Thrusters," May 2013.
  8. Kunning Xu, "Ion Collimation and In-Channel Potential Shaping Using In-Channel Electrodes For Hall Effect Thrusters," June 2012.
  9. Kybeom Kwon, "A Novel Numerical Analysis of Hall Effect Thruster and its Application in Simultaneous Design of Thruster and Optimal Low-Thrust Trajectory," August 2010.

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Other Publications

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  1. Mitchell Walker, "Electric Propulsion," Aerospace America, No. 12, December 15, 2005, pp. 54-55.
  2. Doug Palmer, Masayuki Yano, Mitchell Walker, “Characterization of Cylindrical and Annular Helicon Plasma Sources”, 9th International Workshop on the Interrelationship between Plasma Experiments in Laboratory and Space, Cairns, Australia, August 5-10, 2007.