Ph.D. Dissertations

Éric Choinière, " Theory and Experimental Evaluation of a Consistent Steady-State Kinetic Model for 2-D Conductive Structures in Ionospheric Plasmas with Application to Bare Electrodynamic Tethers in Space ", Ph.D. thesis, University of Michigan, 2004.

Refereed Papers

B.E. Gilchrist, S.G. Bilén, É. Choinière, A. Gallimore, and T. Smith, " Analysis of Chamber Simulations of Long Collecting Probes in High-Speed, Dense Plasmas ", IEEE Transactions on Plasma Science, October 2002, pp. 2023-2034.

Neubert, T. and B. E. Gilchrist, "Particle simulations of relativistic electron beam injection from spacecraft", J. Geophys Res., 107, No. A8, pp. SIA 9-1 to SIA 9-10, Aug. 2002.

Neubert, T. and B. E. Gilchrist, "3D Electromagnetic PIC simulations of relativistic electron pulse injections from spacecraft", Adv. Space Res., 29, No. 9, pp. 1385-1390, 2002.

Gilchrist, B. E., K.L. Jensen, A.D. Gallimore, J. Severns, Space Based Applications For FEA Cathodes (FEACs), Materials Issues in Vacuum Microelectronics: Symposium Proceedings, (Materials Research Society, Warrendale, PA, 2000) V 621, p R481-R487, 2000.

Bilén, S. G. and B. E. Gilchrist, Transient Plasma Sheath Model for Thin Conductors Excited by Negative High Voltage with Application to Electrodynamic Tethers, IEEE Transactions on Plasma Science, V28 N6, p 2058-2074, Dec 2000.

Khazanov, G. V., M. W. Liemohn, E. N. Krivorutsky, J. U. Kozyra, J. M. Albert, and B. E. Gilchrist, On the influence of the initial pitch angle distribution on relativistic electron beam dynamics, J. Geophys. Res., 105, 16093, 2000.

Aguero, V. M., B. E. Gilchrist, S. D. Williams, W. J. Burke, L. Krause, L.C. Gentile, “Current collection model characterizing shuttle charging during the tethered satellite system missions.” J. Spacecraft & Rockets, 37, pp. 212-217, Mar-Apr, 2000.

S. G. Ohler, B. E. Gilchrist, A. D. Gallimore, "Electromagnetic signal modification in a localized high-speed plasma flow: Simulations and experimental validation of a stationary plasma thruster," IEEE Transactions on Plasma Science, Vol.27, no.2, pp.587-594, April 1999.

G. V. Khazanov, M. W. Liemohn, E. N. Krivorutsky, J. M. Albert, J. U. Koznra and B. E. Gilchrist, Relativistic electron beam propagation in the Earth's magnetosphere, J. Geophys. Res., 104, 28587-99, 1999.

Raitt, W. J., D. C. Thompson, B. E. Gilchrist, and V. M. Aguero, Electrical charging of space platforms at low earth orbit altitudes, Adv. Space Res., 24, No. 8, pp. 1015-1025, 1999.

Khazanov, G. V., M. W. Liemohn, E. N. Krivorutsky, J. U. Kozyra and B. E. Gilchrist, Interhemispheric transport of relativistic electron beams, Geophys. Res. Lett., 26, No. 5, p. 581-4, 1 March 1999.

Indiresan, R., B. Gilchrist, S. Basu, J.-P. Lebreton, E. P. Szuszczweicz, Simultaneous, dual-point, in situ measurements of ionospheric structures using space tethers: TSS-1R observations, Geophys. Res. Lett., 25, 3725-3728, Oct. 1, 1998.

Gilchrist, B. E., R. Heelis and W. J. Raitt, Ionospheric Multi-Point Measurements using Tethered Satellite Sensors, Geophysical Monograph 103, Measurement Techniques in Space Plasmas: Fields, American Geophys. Union, edited by R. Pfaff, p. 317-323, 1998.

Agüero, V.M., W. J. Burke, B. E. Gilchrist, N. H. Stone, L. C. Gentile, S. D. Williams, D. L. Cooke, D. C. Thompson, C. Bonifazi and J.-P. Lebreton, Current Collection at the Shuttle Orbiter during the Tethered Satellite System Tether Break, J. Geophys Res, 104, 105, 1999.

Garvin, C., B. E. Gilchrist, D. S. Grimard, J. W. Grizzle, "Measurement and error evaluation of electrical parameters at plasma relevant frequencies and impedances," J. Vac. Sci. Technol. A, Vol. 16, No. 2, p.p. 595-606, March-April, 1998.

Gilchrist, B. E., C. Bonifazi, S. G. Bilén, W.J. Raitt, W. J. Burke, N. H. Stone, J. P. Lebreton, Enhanced electrodynamic tether currents due to electron emission from a neutral gas discharge: Results from the TSS-1R mission,” Geophys. Res. Lett.,Vol. 25 , No. 4, p. 437-440, 1998.

Williams, S. D., B. E. Gilchrist, V. M. Aguero, R. S. Indiresan, D. C. Thompson, and W. J. Raitt, “Measurements of induced potential and natural electric fields using an electrodynamic tether double probe: TSS-1R Results,” Geophys. Res. Lett.,Vol. 25 , No. 4, p. 445-448, 1998.

Thompson, D.C., C. Bonifazi, B.E. Gilchrist, S.D. Williams, W.J. Raitt, J.-P. Lebreton, and W.J. Burke, “The Current-Voltage Characteristics of a Large Probe in Low Earth Orbit: TSS-1R Results,” Geophys. Res. Lett.,Vol. 25 , No. 4, p. 415-418, 1998.

Aguero, V. M., S. D. Williams, B. E. Gilchrist, L. H. Krause, D. C. Thompson, and W. J. Raitt, “Plasma current collection at the shuttle orbiter during TSS-1R high voltage charging,” Geophysical Research Letters., 25, No. 5, pp. 729-732, 1998.

Gentile, L. C., W. J. Burke, C. Y. Huang, J. S. Machuzak, D. A. Hardy, D. G. Olson, B. E. Gilchrist, J.-P. Lebreton, C. Bonifazi, “Negative shuttle charging during TSS-1R,” Geophys. Res. Lett.,Vol. 25 , No. 4, pp. 433-436, 1998.

Burke, W. J., C. Bonifazi, D. A. Hardy, J. S. Machuzak, L. C. Gentile, D. G. Olson, C. Y. Huang, B. E. Gilchrist, J.-P. Lebreton, C. A. Gurgiolo, “Shuttle charging by tether controlled electron beam,” Geophys. Res. Lett.,Vol. 25 , No. 5, p. 717-720, 1998.

Burke, W. J., W. J. Raitt, D. C. Thompson, J. S. Machuzak, L. C. Gentile, B. E. Gilchrist, C. Y. Huang, D. L. Cooke, D. A. Hardy, D. G. Olson, C. Bonifazi, “Shuttle charging by fixed energy beam emissions,” Geophys. Res. Lett.,Vol. 25 , No. 5, p. 725-728, 1998.

Huang, C. Y., W. J. Burke, D. A. Hardy, M. P. Gough, D. G. Olson, L. C. Gentile, B. E. Gilchrist, C. Bonifazi, W. J. Raitt, D. C. Thompson, “Cerenkov emissions of ion acoustic-like waves generated by electron beams emitted during TSS 1R,” Geophys. Res. Lett.,Vol. 25 , No. 5, p. 721-724, 1998.

Bilen, S. G., V. M. Aguero, Brian E. Gilchrist, and W. John Raitt, "Transient potential modification of large spacecraft due to electron emissions: TSS-1 results", J. Spacecr Rockets, vol 34, no 5, pp. 655-661, 1997.

Gilchrist, B. E., S. G. Ohler, A. D. Gallimore "Flexible Microwave System to Measure the Electron Number Density and Quantify the Communications Impact of Electric Thruster Plasma Plumes," Rev. Sci. Inst., Vol. 68, No. 2, February, 1997.

S. G. Ohler, B. E. Gilchrist, A. D. Gallimore, "Microwave Plume Measurements of a Stationary Plasma Thruster," J. Propulsion and Power, vol. 14, No. 6, pp. 1016-1021, November-December, 1998.

Gilchrist, B. E., C. Bonifazi, S. G. Bilen, W.J. Raitt, J. P. Lebreton, "Enhanced electrodynamic tether currents due to electron emission from a neutral gas discharge: Results from the TSS-1R mission," Geophysical Research Letters, 1996.

Neubert, T., B. E. Gilchrist, S. Wilderman, L. Habash, and H.J. Wang, Relativistic electron beam propagation in the Earth's atmosphere: Modeling results, Geophys. Res. Lett., Vol 23, No.9, pp. 1009-1012, May 1, 1996.

Bilén, S. G., B. E. Gilchrist, C. Bonifazi, E. Melchioni, "Transient response of an electrodynamic tether system in the ionosphere: TSS-1 first results,'' Radio Science, Vol. 30, No. 5, 1995.

S. G. Ohler, B. E. Gilchrist, A. D. Gallimore, "Non-intrusive electron number density measurements in the plume of a 1 kW arcjet using a modern microwave interferometer," IEEE Transactions on Plasma Science 23(3), 428-435, 1995.

T. Neubert, B. Gilchrist, and E. Ungstrup, "AMPAS-a new active experiment mission," Adv. Space Res. 15(12), 3-12, 1995.

G. A. Berg, W. J. Raitt, D. C. Thompson, B. E. Gilchrist, N. B. Meyers, P. Rodriguez, and H. R. Anderson, "Overview of the effects of neutral gas releases on high voltage sounding rocket platforms," Adv. Space Res., 15, 83-86, 1995.

Raitt, W. J., J. Ernstmeyer, N. B. Myers, A. B. White, S. Sasaki, K.-I. Oyama, N. Kawashima, A. C. Fraser-Smith, B. E. Gilchrist and T. J. Hallinan, VLF Wave Experiments in Space using a modulated electron beam, J. Spacecraft, 32, 670-679, 1995.

Katz, I., M. Mandell, E. Melchioni, M. Oberhardt, D. Thompson, T. Neubert and B. Gilchrist, Observations of ionospheric heating in the TSS-1 subsatellite presheath, J. Geophys. Res., 99, 8961-8970, 1994.

Aguero, V., P. M. Banks, B. Gilchrist, I. Linscott, W. J. Raitt, D. Thompson, V. Tolat, A. B. White, S. Williams and P. R. Williamson, The Shuttle Electrodynamic Tether System (SETS) on TSS-1, Il Nuovo Cimento, Jan-Feb 1994.

Bonifazi, C., G. Manarini, J. Sabbagh, F. Svelto, D. C. Thompson, B. E. Gilchrist, P. M. Banks and M. Dobrowolny, Tethered Satellite System (TSS): Preliminary results on the active experiment core equipment, Il Nuovo Cimento, 16, 515-538, 1993.

Neubert, T., S. Sasaki, B. Gilchrist, P. Banks, P. R. Williamson, A. Fraser-Smith and W. J. Raitt, Observations of plasma wave turbulence generated around large ionospheric spacecraft: effects of motionally induced EMF and of electron beam emission, J. Geophys. Res., 96, 9639-9654, 1991.

Gilchrist, B. E., Measurements of electron beam and neutral gas emissions in a space plasma during an ionospheric modification experiment, Stanford University, Ph.D., 1991.

Gilchrist, B.E., P. M. Banks, T. Neubert, P. R. Williamson, N. B. Myers, W. J. Raitt and S. Sasaki, Electron collection enhancement arising from neutral gas jets on a charged vehicle in the ionosphere, J. Geophys. Res., 95, 2469-2475, 1990.

Neubert, T., M. J. Mandell, S. Sasaki, B. E. Gilchrist, P. M. Banks, P. R. Williamson, W. J. Raitt, N. B. Myers, K. I. Oyama and I. Katz, The sheath structure around a negatively charged rocket payload, J. Geophys. Res., 95, 6155-6165, 1990.

Neubert, T., P. Banks, B. Gilchrist, A. Fraser-Smith, P. R. Williamson, W. J. Raitt, N. Myers and S. Sasaki, The interactions of an artificial electron beam with the Earth's upper atmospere: effects on spacecraft charging and the near-plasma environment, J. Geophys. Res., 95, 12209-12217, 1990.

Myers, N. B., W. J. Raitt, A. B. White, P. M. Banks, B. E. Gilchrist and S. Sasaki, CHARGE-2: A sounding rocket experiment to investigate vehicle charging effects due to electron beam emission, J. Spacecr. Rockets, 27, 25-37, 1990.

Banks, P.M., B. E. Gilchrist, T. Neubert, N. B. Myers, W. J. Raitt, P. R. Williamson, A. C. Fraser-Smith and S. Sasaki, CHARGE-2 rocket observations of vehicle charging and charge neutralization, Adv. Space Res., 10, 133-136, 1990.

Myers, N. B., W. J. Raitt, B. E. Gilchrist, P. M. Banks, T. Neubert, P. R. Williamson and S. Sasaki, A comparison of current-voltage relationships of collectors in the earth's ionosphere with and without electron beam emission, Geophys. Res. Lett., 16, 365-368, 1989.

Banks, P.M. and B. E. Gilchrist, Artificial plasma density structures produced by energetic electron beams from rockets and spacecraft, Geophys. Res. Lett., 12, 175-178, 1985.

Smith, L.G. and B. E. Gilchrist, Rocket observations of electron density in the nighttime E region using Faraday rotation, Radio Sci., 19, 913-924, 1984.

Short Communications

Gilchrist, B. E., Space Electrodynamic Tethers, Part II, IEEE Instrumentation and Measurement Newsletter, Winter, 1993.

Moore, S.E., B.E. Gilchrist, J.G. Galli, Microwave sampling effective for ultrabroadband frequency conversion, MSN and Comm. Technology, February, 1986.

Gilchrist, B., R. Fildes, J. Galli, Sampling hikes performance of frequency synthesizers, Microwaves & RF, 23(1), 93-94, 1984.

Galli, J., B. Gilchrist, R. Forse, S. Rempel, Integration shrinks microwave front-ends, Parts I-III, Microwave System News, 10(9), 119, 1980.

Galli, J., B. Gilchrist, R. Forse, S. Rempel, Integration shrinks microwave front-ends, Part IV, Microwave System News, 10(10), 70, 1980.

Conference Papers

Fuhrhop, K., Morris, D., and Gilchrist, B., "Electron Emission for Electrodynamic Tether Systems in Space" 40th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, AIAA, 2004, pp. 1-9. Presentation

Deline, Christopher, Goldberg, Hannah, Morris, Dave, and Ramos, Rafael, "Field Emission Cathodes used in the FEGI get away special shuttle mission" 40th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, AIAA, 2004, pp. 1-8. Presentation

Fuhrhop, K., West, B., and Choiniere, E., "Current Collection to Electrodynamic-Tether Systems in Space" 2nd International Energy Conversion Engineering Conference (IECEC), AIAA, 2004, pp. 1-9. Presentation

Fuhrhop, K., Gilchrist, B., and Bilen, S., "System Analysis of the Expected Electrodynamic Tether Performance for the ProSEDS Mission" 39th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, AIAA, 2003, pp. 1-9. Presentation

Morris, D., Gilchrist, B., " Electron Emission for Electric Propulsion: Reducing Power by Mitigating Space Charge Limits", 40th Joint Propulsion Conference, 2004. Presentation

Morris, D., Gilchrist, B., " Electron Field Emission and the Space Charge Limit: Techniques and Tradeoffs", 39th Joint Propulsion Conference, 2003. Presentation

Gilchrist, B.E., Lim, B., Meckel, N., Masse, R., Williams, S. " The Use of Electrodynamic Tethers for Orbit Maintenance and Deorbit of Large Spacecraft: A Trade Study of the NASA GLAST Mission", paper AIAA-2002-4044, presented at the 38th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, 7-10 July 2002, Indianapolis, IN. Presentation

Choinière, E., Gilchrist, B.E., " Electron Collection to Arbitrarily Shaped Electrodynamic Tethers in Flowing Plasmas: a Kinetic Model- Validation for Circular Cross-sections", paper AIAA-2002-4050, presented at the 38th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, 7-10 July 2002, Indianapolis, IN.

Gilchrist, B., S. Bilén, E. Choiniére, A. Gallimore, and D. Herman, Laboratory Experiments of Current Collection to Long Conductors with Geometries Relevant to Bare Electrodynamic Tethers, STAIF-2002, Albuquerque, Feb. 3-6, 2002.

E. Choiniére, B. Gilchrist, and S. Bilén, Kinetic modeling of the electron current collection to a moving bare electrodynamic tether, STAIF-2002, Albuquerque, Feb. 3-6, 2002.

Morris, D., Gilchrist, B.E., Gallimore, A.D., " Integration of Field Emitter Arrays into Spacecraft Systems",
presented at the Space Technology & Applications International Forum in Albuquerque, New Mexico, Feb. 2002.
Dave Morris won the best student paper award at STAIF 2002!

Gilchrist, B. E., S. G. Bilen, E. Choiniére, A. Gallimore, D. Herman, Current collection to long conductors with wide geometries for bare electrodynamic tether applications: a laboratory update, 40th AIAA Aerospace Meeting, Reno, NV, AIAA-2002-1123, 2002.

Gilchrist, B. E., J. Balance, L. Curtis, L. Johnson, J. Vaughn, K. Welzyn, Propulsive Small Expandable Deployer System (ProSEDS): Preparing for Flight, 27th Intl. Electric Propulsion Conf., IEPC-01-240, Pasadena, October 14-19, 2001.

Morris, D., B. Gilchrist, A. Gallimore, Development of Field Emitter Technology for ED Tether Propulsion, 27th Intl. Electric Propulsion Conf., IEPC-01-240, Pasadena, October 14-19, 2001.

Choinière, E., Gilchrist, B.E., " Kinetic Modeling of the Electron Current Collection to a Moving Bare Electrodynamic Tether", paper IEPC-01-243, presented at the 27th International Electric Propulsion Conference, Pasadena, 15-19 October 2001.

Gilchrist, B.E., Bilén, S.G., Choinière, E., Gallimore, A.D., Herman, D.A., "Ground Simulations of Electron Current to Wide Probes for Electrodynamic Tethers", paper AIAA 2001-3337, presented at the 37th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, Salt Lake City, 8-11 July 2001.

Choinière, E., Gilchrist, B.E., " Enhancement of Electrodynamic Tether Electron Current Collection Using Radio Frequency Power: Numerical Modeling and Measurements", paper AIAA 2001-3339, presented at the 37th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, Salt Lake City, 8-11 July 2001.

Gilchrist, B.E., Bilén, S.G., Gallimore, A.D., " Current Collection to Long, Thin Probes in a Dense High-Speed Flowing Plasma", presented at the Space Technology & Applications International Forum 2001 in Albuquerque, New Mexico, Feb. 2001.

Bilén, S. G. and B. E. Gilchrist, Electrodynamic-tether time-domain reflectometer for analyzing tether faults and degradation, STAIF-2001, Albuquerque, Feb. 11-15, 2001.

Choinière, E., Gilchrist, B.E., Bilén, S.G., " Enhancement of Electrodynamic Tether Electron Current Collection Using Radio Frequency Power", presented at the Space Technology & Applications International Forum 2001 in Albuquerque, New Mexico, Feb. 2001.
Eric Choinière won the best student paper award at STAIF 2001!

Morris, D., Gilchrist, B.E., Gallimore, A.D., " The Effect of Plasma Density and Emitter Geometry on Space Charge Limits for Field Emitter Array Electron Charge Emission into a Space Plasma",
presented at the Space Technology & Applications International Forum in Albuquerque, New Mexico, Feb. 2001.

Gilchrist, B. E., Bilén, S. G., Gallimore, A.D., " Analysis of Chamber Simulations of Long Probes in High-Speed, Dense Plasmas", paper no AIAA 2001-1142, presented at the 39th AIAA Aerospace Sciences Meeting and Exhibit, Reno, 8-11 January 2001.

West, B., Gilchrist, B.E., "Life Extension and Orbit Maneuvering Strategies for Small Satellites in Low Earth Orbit Using Electrodynamic Tethers", paper AIAA-2001-1139, presented at the 39th AIAA Aerospace Sciences Meeting and Exhibit, Reno, 8-11 January 2001.

Van Noord, J. L., B. West, and B. Gilchrist, Electrodynamic tape tether Performance with varying tether widths at low Earth altitudes, 39th AIAA Aerospace Meeting, Reno, NV, AIAA-2001-1141, 2001.

Gilchrist, B., S. Bilén, T. Patrick, J. Van Noord, Bare electrodynamic tether ground simulations in a dense, high-speed plasma flow, 36th AIAA/ASME/SAE/ASEE Joint Prop. Conf., AIAA 2000-3869, Huntsville, AL, July 16-20, 2000.

Bilén, S.G., Choinière, E., Gilchrist, B.E., " Applications of Electrodynamic Tethers Utilizing Their Transmission-Line Characteristics", presented at the 36th AIAA/ASME/SAE/ASEE Joint Propulsion Conference in Huntsville, Alabama, June 2000.

Morris, D., Gilchrist, B.E., Gallimore, A.D., " Developing Field Emitter Array Cathode Systems for Electrodynamic Tether Propulsion", paper AIAA 2000-3867, presented at the 36th AIAA/ASME/SAE/ASEE Joint Propulsion Conference in Huntsville, Alabama, June 2000.

Gilchrist, B. E.,, K. L. Jensen, G. Aston and K. Hwang, Plasma Contactors for the STEP-AIRSEDS Mission: Systems and Performance, AIAA Aerospace Conference-2000, 2000.

Gilchrist, B. E., L. Johnson, S. Bilén, E. Lorenzini, N. Voronka, System Considerations of Electrodynamic-Tether Propulsion Technology and Future Plans, 26th Int. Elec. Prop. Conf, Kitakyushu City,Japan, IEPC 99-220, Oct.18-21, 1999.

Gilchrist, B., S. Bilén, L. Johnson, Space Electrodynamic Tethers Propulsion Technology: System Considerations and Future Plans, 35th AIAA/ASMA/SAE/ASEE Joint Propulsion Conference, Los Angeles, CA, June 21-24, 1999.

Davis, C., B. Gilchrist, A. Gallimore, Density and Spectral Measurements using a 34 GHz Interferometry System, 35th AIAA/ASMA/SAE/ASEE Joint Propulsion Conference, Los Angeles, CA, June 21-24, 1999.

Sven G. Bilen, Luis P. Bernal, Brian E. Gilchrist, and Alec D. Gallimore, "The Student Space-Systems Fabrication Laboratory: Enhancing Engineering Education Through Student-Run, Real-World Projects," ASEE NCS1999, PSU, Erie, PA, 9-10 April 1999.

Gilchrist, B. E., S. G. Bilén, W. J. Burke, L. Gentile and V. M. Aguero, Large Current Response Using a Neutral Gas Discharge Electron Emission Source during the TSS-1R Mission: Tether Break Results, paper presented at 6th Spacecraft Charging Technology Conference, Hanscom AFB, Bedford, MA, 1998.

Gilchrist, B. E., A. Gallimore and J. Laframboise, Laboratory Experiments to Investigate the Effects of High Speed Bulk Plasma Drift on Current Collection Physics in a Space Magnetoplasma: A Feasibility Assessment, paper presented at 6th Spacecraft Charging Technology Conference, Hanscom AFB, Bedford, MA, 1998.

Gilchrist, B. E. and L. Johnson, Electrodynamic Tethers as Propulsion Systems: System Considerations and Future Plans, paper presented at 6th Spacecraft Charging Technology Conference, Hanscom AFB, Bedford, MA, 1998.

Davis, C. N., B. E. Gilchrist, S. G. Ohler, D. Carlson and A. Gallimore, Electromagnetic Wave Scattering from EP Thruster Plasma Plumes, paper presented at 6th Spacecraft Charging Technology Conference, Hanscom AFB, Bedford, MA, 1998.

Johnson, L., B. Gilchrist, R. Estes, E. Lorenzini and J. Ballance, Propulsive small expendable deployer system (ProSEDS) space experiment, paper presented at 34th AIAA/ASME/SAE/ASEE Joint Propulsion Conf., Cleveland, OH, AIAA 98-4035, 1998.

Johnson, L., B. Gilchrist, R. Estes, E. Lorenzini, M. Martinez-Sanchez and J. Sanmartin, Electrodynamic tether propulsion for spacecraft and upper stages, paper presented at 1998 JANNAF Propulsion Meeting, Cleveland, OH, 1998.

Morris, D., Gilchrist, B.E., " Enhancing In-Situ Multipoint Measurements of Plasma Density Using Simultaneous Radiowave Measurements of Total Electron Current", presented at the URSI 1997 conference.

Johnson, L. and J. Ballance, Propulsive small expendable deployer system (ProSEDS) space demonstration, Tether Technology Interchange Meeting, Huntsville, Sept. 9-10, 1997.

Gilchrist, B.E. and R. Heelis, “Multiple tethered satellites for ionospheric studies (MTSIS),” Tether Technology Interchange Meeting, Huntsville, AL, Sept. 9-10, 1997.

Johnson, L., J. Caroll, R. Estes, B. Gilchrist, E. Lorenzini, M. Martinez-Sanchez, J. Sanmartin and E. Vas, Electrodynamic tethers for reboost of the International Space Station and spacecraft propulsion, paper presented at AIAA Space Programs and Technology Conference, Huntsville, AL, AIAA 96-4250, 1996.

Ohler, S., B. Gilchrist, A. Gallimore, A. Ruffin, C. Davis, RF Signal Impact Study of an SPT, paper presented 32nd AIAA/ASMA/SAE/ASEE Joint Propulsion Conference, Orlando, FL, July1-3, 1996.

Ohler, S., B. Gilchrist and A. Gallimore, Microwave plume measurements of an SPT-100 using Xenon and a laboratory model SPT using Krypton, paper presented at 31st AIAA/ASMA/SAE/ASEE Joint Propulsion Conference, San Diego, CA, 1995.

Gilchrist, B. E., C. Bonifazi, D. C. Thompson, V. M. Aguero, P. M. Banks, W. J. Raitt, S. D. Williams, S. G. Bilén, N. R. Voronka and A. C. Fraser-Smith, TSS-1 SETS and CORE experiment results and plans for reflight, paper presented at Fourth International Conference on Tethers in Space, Washington, D.C., 1995.

B. E. Gilchrist, R. Heelis, W.J. Raitt, C. Rupp, H.G. James, C. Bonifazi, K.-I. Oyama, G. Wood, L.M. Brace, and G.R. Carignan, "Space tethers for ionospheric-thermospheric-mesospheric science - Report on the 1994 international summer workshop, Ann Arbor, MI," Fourth International Conference on Tethers in Space Washington, D.C. (1995).

B. E. Gilchrist, P. L. Niles, J. Dodds, B. C. Kennedy, and C. C. Rupp, "AIRSATT - Atmospheric/Ionospheric Research Satellite using Advanced Tether Technology," Fourth International Conference on Tethers in Space, Washington, D.C. (1995).

B. E. Gilchrist, C. Bonifazi, D.C. Thompson, V.M. Aguero, P.M. Banks, W.J. Raitt, S.D. Williams, S.G. Bilén, N.R. Voronka, and A.C. Fraser-Smith, "TSS-1 SETS and CORE experiment results and plans for reflight," Fourth International Conference on Tethers in Space, Washington, D.C. (1995).

S. Bilén, B. E. Gilchrist, E. Melchioni, M. Dobrowolny, and C. Bonifazi, "Transient response of the TSS system in the ionosphere," Fourth International Conference on Tethers in Space, Washington, D.C. (1995).

L. A. Habash, T. Neubert, and B. E. Gilchrist, "The use of electron beam experiments in orbiting tethered platforms for remote sensing of E|| in the auroral acceleration region: The Active Magnetospheric Particle Acceleration Satellite (AMPAS)," Fourth International Conference on Tethers in Space, Washington, D.C. (1995).

S. D. Williams, B. E. Gilchrist, D. C. Thompson, V. M. Aguero, P. M Banks, W. J. Raitt, and N. R. Voronka, "Induced ionospheric double probe tether potential measurements and models for TSS-1 electrodynamics," Fourth International Conference on Tethers in Space, Washington, D.C. (1995).

P. L. Niles, B. E. Gilchrist, and J. N. Estes, "Dual tethered satellite systems for space physics research," Fourth International Conference on Tethers in Space ,Washington, D.C. (1995).

Ohler, S., B. Gilchrist and A. Gallimore, Non-intrusive plamsa diagnostics for electric propulsion research, paper presented at 30th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, Indianapolis, IN, 1994.

B. E. Gilchrist and J. F. Vesecky, "AIRSATT - Atmospheric/Ionospheric Research Satellite using Advanced Tether Technology," 10th Annual NASA/USRA Advanced Space Design Program, Pasadena, TX (1994).

Gilchrist, B.E., P.M. Banks, T. Neubert, P.R. Williamson, N.B. Myers, W. J. Raitt, and S. Sasaki, Effects of neutral gas release on current collection during the CHARGE-2 rocket experiment, Workshop on Current Collection from Space Plasmas, University of Alabama, Huntsville, 1989.

Gilchrist, B. E., Conceptual design for a microwave active phased array SAR, EASCON, 1986.

Gilchrist, B.E. and R. Fildes, The use of sampling techniques for miniaturized synthesizer applications, MTT International Symposium, Los Angeles, CA, 1982.