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Journal Publications

  1. Kieckhafer, A. W., Walker, M. L. R., “Development of a Helicon RF Power Delivery System for Use with Electric Propulsion Performance Diagnostics,” July 2009 – In Progress
     

  2. Book, C., Walker, M. L. R., "Effect of Anode Temperature on Hall Effect Thruster Performance," Journal of Propulsion and Power, November 2009 – In Review
     

  3. Williams, L. T., Walker, M. L. R., Kumsomboone, V. S., Ready, W. J., “Experimental Characterization of Carbon Nanotube Field Emission Cathode Lifespan,” Journal of Physics D, August 2009 - In Review
     

  4. Williams, L. T., Walker, M. L. R., Kumsomboone, V. S., Ready, W. J., “Experimental Characterization of an Arrayed Carbon Nanotube Field Emission Cathode,” Physical Review B, August 2009 - In Review
     

  5. Palmer, D. D., Walker, M. L. R., "Performance Analysis of a Medium-Power Helicon Thruster," Journal of Propulsion and Power, October 2008. – In Review
     

  6. Palmer, D. D., Walker, M. L. R., "Operation of an Annular Helicon Plasma Source," Journal of Propulsion and Power, Volume 25, Number 5, September-October 2009, pp. 1013-1019.
     

  7. Xu, K., Walker, M. L. R., “High-Power, Null-Type, Inverted Pendulum Thrust Stand,” Review of Scientific Instruments, Volume 80, Number 5, May 2009, pp. 055103 1-6.
     

  8. Walker, M. L. R., Gallimore, A. D., “Hall Thruster Cluster Operation with a Shared Cathode,” Journal of Propulsion and Power, Volume 23, Number 3, May 2007, pp. 528-536.
     

  9. Yano, M., Walker, M. L. R., “Generalized Theory of Annularly-Bounded Helicon Waves,” Physics of Plasmas, Volume 14, Number 3, March 2007, pp. 033510 1-7.
     

  10. Walker, M. L. R., Gallimore, A. D., “Performance Characteristics of a Cluster of 5-kW Laboratory Hall Thrusters,” Journal of Propulsion and Power, Volume 23, Number 1, January 2007, pp. 35-43.
     

  11. Yano, M., Walker, M. L. R., “Plasma Ionization by Annularly-Bounded Helicon Waves,” Physics of Plasma, Volume 13, Number 6, June 2006, pp. 063501 1-5.
     

  12. Rovey, J. L., Walker, M. L. R., Peterson, P. Y., Gallimore, A. D., “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.
     

  13. Walker, M. L. R., Hofer, R. R., Gallimore, A. D., "Ion Collection in Hall Thruster Plumes," Journal of Propulsion and Power, Volume 22, Number 1, Jan.-Feb., 2006, pp. 205-209.
     

  14. Walker, M. L. R., Victor, A. L., Hofer, R. R., Gallimore, A. D., "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.
     

  15. Walker, M. L. R., Gallimore, A. D., "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.
     

  16. Walker, M. L. R., Gallimore, A. D., Cai, C., Body, I. D., "Vacuum Chamber Pressure Maps of a Hall Thruster Cold Flow Expansion," Journal of Propulsion and Power, Volume 20, Number 6, Nov.–Dec. 2004, pp. 1127-1131.

  
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Conference Papers

  1. Williams, L., Walker, M. L. R., Kumsomboone, V. S., Ready, W. J., “Experimental Characterization of Carbon Nanotube Cold Cathode Lifetime Operation”, 45th Joint Propulsion Conference, Denver, CO, August 2-5, 2009.
     

  2. Carlsson, J., Pavarin, D., Walker, M., "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.
     

  3. Williams, L., Walker, M. L. R., “Experimental Characterization of a Carbon Nanotube Field Emission Cathode”, AIAA-2008-5015, 44th Joint Propulsion Conference, Hartford, CT, July 20-23, 2008.
     

  4. Palmer, D., Walker, M. L. R., “Performance of an Annular Helicon Plasma Source”, AIAA-2008-4926, 44th Joint Propulsion Conference, Hartford, CT, July 20-23, 2008.
     

  5. Palmer, D., Walker, M. L. R., Manente, M., Carlsson, J., Bramanti, C., Pavarin, D., “Performance Analysis of a Low-Power Helicon Thruster”, AIAA-2008-4925, 44th Joint Propulsion Conference, Hartford, CT, July 20-23, 2008.
     

  6. Pavarin, D., Manente, M., Walker, M. L. R., Palmer, D., Carlsson, J., Bramanti, C., Saggin, B., “Feasibility Study of a Medium-Power Helicon Thruster”, AIAA-2008-4927, 44th Joint Propulsion Conference, Hartford, CT, July 20-23, 2008.
     

  7. King, S. T., Walker, M. L. R., Kluever, C. A., “Small Satellite LEO Maneuvers with Low-Power Electric Propulsion ”, AIAA-2008-4516, 44th Joint Propulsion Conference, Hartford, CT, July 20-23, 2008.
     

  8. Palmer, D., Walker, M. L. R., Manente, M., Carlsson, J., Bramanti, C., Pavarin, D., “Experimental Analysis of Low-Power Helicon Thruster”, 5th International spacecraft Propulsion Conference, Crete, Greece, May 5-9, 2008.
     

  9. Manente, M., Walker, M. L. R., Carlsson, J., Bramanti, C., Pavarin, D., “Feasibility Study of Low-Power Helicon Thruster”, 5th International spacecraft Propulsion Conference, Crete, Greece, May 5-9, 2008.
     

  10. Palmer, D., Akinli, C., Walker, M. L. R., “Characterization of an Annular Helicon Plasma Source”, IEPC-2007-202, International Electric Propulsion Conference, Florence, Italy, September 17-20, 2007.
     

  11. Akinli, C., Palmer, D., Walker, M. L. R., “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.
     

  12. Palmer, D., Yano, M., Walker, M. L. R., “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.
     

  13. Stubbers, R, Jurczyk, B. E., Rovey, J. L., Walker, M. L. R., Alman, D. A. Coventry, M. D., “Compact Toroid Formation Using an Annular Helicon Preionization Source”, AIAA-2007-5307, 43rd Joint Propulsion Conference, Cincinnati, OH, July 8-11, 2007.
     

  14. Yano, M., Williams, L., Walker, M. L. R. “Design and Operation of an Annular Helicon Plasma Source”, AIAA-2007-5309, 43rd Joint Propulsion Conference, Cincinnati, OH, July 8-11, 2007.
     

  15. Gilland, J. H., Walker, M. L. R., Pencil, E. J., "Thrust Stand for Applied Field MPD Thrusters", IEPC-2005-215, 29th International Electric Propulsion Conference, Princeton, NJ, Oct. 31-Nov. 4, 2005.  
     

  16. Walker, M. L. R., Gallimore, A. D., "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.
     

  17. Rovey, J. L., Walker, M. L. R., Gallimore, A. D., Peterson, P. Y., "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.
     

  18. Walker, M. L. R., Gallimore, A. D., "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.
     

  19. Walker, M. L. R., Gallimore, A. D., Cai, C., Body, I. D., "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.
     

  20. Walker, M. L. R., Hofer, R. R., Gallimore, A. D., "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.
     

  21. Boyd, I. D., Cai, C., Walker, M. L. R., Gallimore, A. D., “Computation of Neutral Gas Flow of a Hall Thruster into a Vacuum Chamber,” 23rd International Symposium on Rarefied Gas Dynamics, Whistler, British Columbia, July 20-25, 2002.
     

  22. Hofer, R. R., Walker, M. L. R., Gallimore, A. D., "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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