Dr. John D. Williams

Publications

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  Refereed Journal Articles Top
27 D.E. Swanson, R.M. Geisthardt, J.T. McGoffin, J.D. Williams, and J.R. Sites, "Improved CdTe Solar-Cell Performance by Plasma Cleaning the TCO Layer," IEEE Journal of Photovoltaics, scheduled to be published in Feb. 2013. 2013
26 N.A. Riedel, B.S. Smith, J.D. Williams, and K.C. Popat, "Improved thrombogenicity on oxygen etched Ti6Al4V surfaces," Materials Science and Engineering C - Materials for Biological Applications, V. 32, Issue 5, 2012, pp. 1196-1203. 2012
25 N.A. Riedel, T.B. Cote, S.L. Bechara, K.C. Popat, and J.D. Williams, "Low energy helium ion texturization of titanium and relevance to biomedical applications," Surface and Coatings Technology, V. 206, Issue 23, 2012, pp. 4750-4755. 2012
24 N.A. Riedel, S.L. Bechara, K.C. Popat, and J.D. Williams, "Ion Etching for Sharp Tip Features on Titanium and the Response of Cells to these Surfaces," Materials Letters, V. 81, 2012, pp. 158-161. 2012
23 J.D. Williams, J. Sanmartin, and L.P. Rand, "Low Work Function Coating for an Entirely Propellant-less Bare Electrodynamic Tether," IEEE Transactions of Plasma Science, V. 40, No. 5, 2012, pp. 1441-1445. 2012
22 N.A. Riedel, J.D. Williams, and K.C. Popat, "Ion beam etching titanium for enhanced osteoblast response," J. of Materials Science, V. 46, 2011, pp. 6087--6095. (Impact Factor: 1.855 ) 2011
21 J.D. Williams, J. Sanmartin, and L.P. Rand, "Low Work Function Coating for an Entirely Propellant-less Bare Electrodynamic Tether," accepted to IEEE Transactions on Plasma Science in August 2011 with minor revision for publication in a special edition on Spacecraft Charging Technology to be published in early 2012. 2011
20 Casey C. Farnell, J.D. Williams, and Cody C. Farnell, "Comparison of Hollow Cathode Discharge Plasma Configurations," Plasma Sources Sci. and Tech., V. 20, No. 2, Article #- 025006, 2011. (Impact Factor: 2.218) 2011
19 J.D. Williams and R. Corey, "Influence of Residual Gases on Witness Plate Measurements during Hall-effect Thruster Testing," Plasma Sources Science and Technology, V. 19, N. 2, Article #- 025020, April 2010. 2010
18 Cody C. Farnell and J.D. Williams, "Ion Thruster Grid Design Using an Evolutionary Algorithm," J. of Prop. and Power, V. 26, N. 1, Jan.--Feb. 2010, pp. 125-129. 2010
17 N. Yamamoto, L. Tao, B. Rubin, J.D. Williams, and A.P. Yalin, "Sputter Erosion Sensor for Anode Layer-Type Hall Thrusters Using Cavity Ring-Down Spectroscopy," J. of Prop. and Power, V. 26, N. 1, Jan.--Feb. 2010, pp. 142-148. 2010
16 B. Rubin, Casey C. Farnell, J.D. Williams, J.A. Vaughn, T. Schneider, and D. Ferguson, " Magnetic filter type plasma source for ground-based simulation of low earth orbit environment," Plasma Sources Sci. and Technol., V. 18, N. 2, Article Number: 025015, May 2009. 2009
15 J. Wang, Y. Caoy, R. Kafafy, R.A. Martinez, and J.D. Williams, "Numerical and Experimental Investigations of Cross-Over Ion Impingement for Sub-Scale Ion Optics," J. Propulsion and Power, V. 24, No. 3, May-June 2008, pp. 562-570. 2008
14 B. Rubin and J.D. Williams, "Hollow Cathode Conditioning and Discharge Initiation," J. of Applied Physics, V. 104, No. 5, Article Number: 053302, SEPT. 1, 2008. 2008
13 H.A. Fujii, T. Watanabe, , H. Kojima, K.I. Oyama, T. Kusagayac, Y. Yamagiwa, H. Ohtsu, M. Cho, S. Sasaki, K. Tanaka, J.D. Williams, et al "Sounding Rocket Experiment of Bare Electrodynamic Tether System," Acta Astronautica, online July 6, 2008, doi:10.1016/j.actaastro. 2008.07.006 2008
12 P.J. Wilbur, M. Wilson,K. Hutchings, J.D. Williams, "Emissive Membrane Ion Thruster Concept," J. of Propulsion and Power, V. 23, No. 5, Sept.-Oct. 2007, pp. 1049-10-54. 2007
11 A.P. Yalin, J.D. Williams, V. Surla, and K.A. Zoerb, "Differential sputter yield profiles of molybdenum due to bombardment by low energy xenon ions at normal and oblique incidence," J of Physics D- Applied Physics, V. 40, No. 10, pp. 3194-3202, May 21, 2007 2007
10 S.P. Rawal, A.R. Perry, J.D. Williams, P.J. Wilbur, D.M. Laufer, W. Shih, J. Polaha, and W.A. Hoskins, "Performance Evaluation of 8-cm Diameter Ion Optics Assemblies Fabricated from Carbon-Carbon Composites," J. of Propulsion and Power, V. 22, No. 3, pp. 604-610, May-June 2006. 2006
9 A.P. Yalin, V. Surla, M. Butweiller, and J.D. Williams, "Detection of Sputtered Metals using Cavity Ring-Down Spectroscopy", Applied Optics, V. 44, No. 30, pp. 6496-6505, Oct. 20, 2005. 2005
8 V. Surla, P.J. Wilbur, M.L. Johnson, J.D. Williams, and A.P. Yalin, "Sputter Erosion Measurements of Titanium and Molybdenum by Cavity Ring-Down Spectroscopy", Review of Sci. Instr., V. 75, No. 9, pp. 3025-3030, 2004. 2004
7 Z. Yu, K. Hoshimiya, J.D. Williams, S.F. Polvinen, and G.J. Collins, "Radio-Frequency-Driven Near Atmospheric Pressure Microplasma in a Hollow Slot Electrode Configuration," Applied Physics Letters, V. 83, No. 5, pp. 854-856, August 4, 2003. 2003
6 J.N. Matossian, R. Wei, and J.D. Williams, "Plasma-Based Ion Implantation and Electron-Bombardment for Large-Scale Surface Modification of Materials," Surface and Coatings Technology, V. 96, No. 1, pp.58-67, 1997. 1997
5 J.J. Vajo, J.D. Williams, R. Wei, R.G. Wilson, and J.N. Matossian, "Plasma Ion Implantation of Nitrogen into Silicon: Characterization of the Depth Profiles of Implanted Ions," J. of Applied Physics, Vol. 76, No. 10, Pt. 1, pp. 5666-5675, Nov. 15, 1994. 1994
4 C.J. Gaeta, J.N. Matossian, R.S. Turley, J.R. Beattie, J.D. Williams, and W.S. Williamson, "Erosion Rate Diagnostics in Ion Thrusters Using Laser-Induced Fluorescence," J. of Propulsion and Power, Vol. 9, No. 3, pp. 369-376, May-June 1993. 1993
3 J.D. Williams and P.J. Wilbur, "Electron Emission from a Hollow Cathode-Based Plasma Contactor," J. of Spacecraft and Rockets, Vol. 29, No. 6, pp. 820-829, Nov.-Dec. 1992 1992
2 J.D. Williams and P.J. Wilbur, "Experimental Study of Plasma Contactor Phenomena," Russian Translation in Aero/Cosmocheskaya Techika, No. 11, pp. 3-10, Nov. 1991. 1991
1 J.D. Williams and P.J. Wilbur, "Experimental Study of Plasma Contactor Phenomena," J. of Spacecraft and Rockets, Vol. 27, No. 6, pp. 634-641, Nov.-Dec. 1990. See also J.D. Williams and P.J. Wilbur, Russian Translation in Aero/Cosmocheskaya Techika, No. 11, pp. 3-10, Nov. 1991. 1990
 
  Non-Refereed Journal Articles / Chapters / Proceedings / Transactions Top
87 Carlos A. Maldonado, Andrew D. Ketsdever, and Taylor C. Lilly, Lauren P. Rand, Kan Xie, Casey C. Farnell, and John D. Williams, "Source Characterization for a Combined Effects Space Simulation Facility," AIAA Aerospace Sciences Meeting, Grapevine, Texas, 7--10 January 2013. 2013
86 Garrett Metz, Len Mahoney, John D. Williams, Drew Swanson, Walajabad S. Sampath, "A plasma-enhanced close-spacing sublimation (PECSS) device for photovoltaic thin-film modification," 65th Gaseous Electronics Conference, Austin, Texas, Oct. 22-26, 2012. 2012
85 Drew E. Swanson, Ryan M. Lutze, Walajabad S. Sampath, and John D. Williams, "Plasma Cleaning of TCO Surfaces Prior to CdS/CdTe Deposition," 38th IEEE Photovoltaic Specialists Conference, Austin, Texas, July 2012, pp. 859-863. 2012
84 S.G. Biedron, ..., Lauren P. Rand, John D. Williams, et al., "The CSU Accelerator and FEL Facility," 34th International Free Electron Laser Conference, Nara, Japan, August 26-31, 2012. 2012
83 Carlos A. Maldonado, Andrew D. Ketsdever, Lauren Rand, Kan Xie, Casey Farnell, and John Williams, "Development of a Ground-Based Facility to Study Combined Effects," 27th Space Simulation Conference, Annapolis, Maryland, Nov. 5-8, 2012. 2012
82 L.P. Rand and J.D. Williams, "Hollow Cathode with Low Work Function Electride Insert," Proceedings of ASME 2011 International Mechanical Engineering Congress & Exposition, IMECE 2011, Denver, CO, Nov. 11-17, 2011. 2011
81 L.P. Rand, R.L. Hoyt, and J.D. Williams, "Hollow Cathode with Electride Insert," AIAA-2011-5992, Joint Propulsion Conference, San Diego, CA, July 31-Aug. 3, 2011. 2011
80 A.L. Jurgensmeyer, J.D. Williams, et al, "Superlattice-based Thermoelectric Materials Fabricated using Ion Beam Deposition," AIAA-2011-5980, Int'l Energy Conversion and Engineering Conference, San Diego, CA, July 31-Aug. 3, 2011. 2011
79 S. Mahalingam, Y. Choi, P. Stoltz, L.P. Rand, and J.D. Williams, "Particle-in-Cell (PIC) Tools for Simulation of Electrodynamic Bare Tether Plasma Interactions," ICOPS 2011, Topic- Computational Plasma Physics I # IP2B-14, Chicago, IL, June 28, 2011. 2011
78 Juan R. Sanmartin, Enrico C. Lorenzini, John D. Williams, Francisco García-de-Quirós, Tim van Zoest, and Jesús Marcos, "Propellantless deorbiting of space debris by bare electrodynamic tethers," International Astronautical Congress, paper code IAC-11-A6, Capetown, South Africa, Oct. 2011. 2011
77 Juan R. Sanmartin, Enrico C. Lorenzini, John D. Williams, Francisco García-de-Quirós, Tim van Zoest, and Jesús Marcos, "Propellantless deorbiting of space debris by bare electrodynamic tethers," International Astronautical Congress, IAC-11-A6, Cape Town, South Africa, Oct. 2011. 2011
76 Lauren P. Rand and J.D. Williams, "Ultra Low Work Function, Non-Consumable Insert for Hollow Cathodes Formed From C12A7 Electrice," 57th JANNAF Propulsion Meeting, Colorado Springs, CO, May 3-7, 2010. 2010
75 Lauren P. Rand,S. Mahalingam, J. Sanmartin, J.D. Williams, "Ultra Low Work Function Coating for Combined Passive Electron Emission and Collection for Spacecraft Charging Neutralization and Electrodynamic Tether Applications," 11th Spacecraft Charging Technology Conference,Sept. 20-24, Albuquerque, NM. 2010
74 J.D. Williams, P.J. Wilbur, C.C. Farnell, and C.C. Farnell, M.Wilson and K. Hutchings, "Ion Emissive Membranes for Propulsion Applications," in proc. of Space, Prop. & Energy Sciences Int'l Forum, ed., G.A. Robertson, AIP Conf. Proc.1103, 2009. 2009
73 Casey C. Farnell, John D. Williams, and Cody C. Farnell, "Comparison of Hollow Cathode Discharge Plasma Configurations", 31st International Electric Propulsion Conference, September 2009, Ann Arbor, MI, IEPC-2009-016 2009
72 Binyamin Rubin and John D. Williams, "Hollow Cathode Discharge Initiation and Fast Starting Cathode", 31st International Electric Propulsion Conference, September 2009, Ann Arbor, MI, IEPC-2009-026 2009
71 Casey C. Farnell, Daniel L.Brown, Garret M. Willis, Richard D. Branam and John D. Williams, "Remote Diagnostic Measurements of Hall Thruster Plumes", 31st International Electric Propulsion Conference, Sept. 2009, Ann Arbor, MI, IEPC-2009-031 2009
70 N. Yamamoto, L. Tao, B. Rubin, J.D. Williams, A.P. Yalin, "Cavity Ring-Down Spectroscopy Sensor for Real Time In Situ Measurement of Sputter Erosion in Anode Layer Type Hall Thrusters", 31st International Electric Propulsion Conference, Sept. 2009, Ann Arbor, MI, IEPC-2009-147 2009
69 B. Rubin and J.D. Williams, "Hollow Cathode Conditioning and Discharge Initiation Studies," 2007 International Conference on Plasma Science and 16th IEEE Pulsed Power Conference, Albuquerque, NM, June 2007, IEEE Catalog Number: 07CH37864C, ISBN: 1-4244-0914-4  Read this online 2007
68 C.C. Farnell and J.D. Williams, "Direct and Remote Measurements of a Hollow Cathode Discharge," 2007 International Conference on Plasma Science and 16th IEEE Pulsed Power Conference, Albuquerque, NM, June 2007, IEEE Catalog Number: 07CH37864C, ISBN: 1-4244-0914-4  Read this online 2007
67 C.C. Farnell and J.D. Williams, "Genetic Algorithm for Ion Thruster Grid Design," 2007 International Conference on Plasma Science and 16th IEEE Pulsed Power Conference, Albuquerque, NM, June 2007, IEEE Catalog Number: 07CH37864C, ISBN: 1-4244-0914-4  Read this online 2007
66 A.P. Yalin , B. Rubin , S.R. Domingue , Z. Glueckert , J.D. Williams, "Differential Sputter Yields Of Boron Nitride, Quartz, and Kapton Due to Low Energy Xe Bombardment, AIAA 2007-5314-1, Joint Propulsion Conference, Tucson, AR, July 2007. 2007
65 J. D. Williams, B. Rubin, and C. C. Farnell, "Fast Starting Hollow Cathodes for Sounding Rocket-based Tether Experiments," 2007 JANNAF Conference, Denver, CO, May 2007. 2007
64 Farnell, C.C. M. Schmidt, R. Millot, D. Warner, K. Siler-Evans, and J.D. Williams. "Multi-Axis Probe Positioning System (MAPPS) for Characterization of Plasma Thruster Plumes,"AIAA-2006-4818, 42nd Joint Propulsion Conference & Exhibit, Sacramento, CA, July 9-12, 2006.   Read this online 2006
63 Martin, R.H. and J.D. Williams, "Plasma Property Measurements of a Hollow Cathode Discharge Using a Fast Probe Diagnostic System," AIAA-2006-4820, 42nd Joint Propulsion Conference & Exhibit, Sacramento, CA, July 9-12, 2006.   Read this online 2006
62 Martinez, R.A. and J.D. Williams, "Electric Field Breakdown Properties of Materials Used in Ion Optics Systems," AIAA-2006-5004, 42nd Joint Propulsion Conference & Exhibit, Sacramento, CA July 9-12, 2006.  Read this online 2006
61 Drummond, G.N. and J.D. Williams "Test Console Development for Ion Thrusters Using Three-Phase Resonant Conversion," AIAA-2006-4339, 42nd Joint Propulsion Conference & Exhibit, Sacramento, CA, July 9-12, 2006.  Read this online 2006
60 Yalin, A.P., J.D. Williams and K.A. Zoerb, "Azimuthal Differential Sputter Yields of Molybdenum by Low Energy Xe+ Bombardment," AIAA-2006-4339, 42nd Joint Propulsion Conference & Exhibit, Sacramento, CA, July 9-12, 2006.  Read this online 2006
59 Yalin A.P. , V. Surla , C.C. Farnell , C. Shadburn , and J.D. Williams, "Sputtering Studies of Multi-Component Materials by Weight Loss and Cavity Ring-Down Spectroscopy," AIAA-2006-4338, 42nd Joint Propulsion Conference & Exhibit, Sacramento, CA, July 9-12, 2006.  Read this online 2006
58 Kafafy, R., J. Wang, R.A. Martinez, C.C. Farnell, and J.D. Williams, "Ion Impingement Limits of Subscale Ion Optics: Comparisons of Simulations and Experiments," AIAA-2006-4999, 42nd Joint Propulsion Conference & Exhibit, Sacramento, CA, July 9-12, 2006.  Read this online 2006
57 Martinez, R.A., and J.D. Williams, "Electric Field Breakdown Properties of Carbon-Based and Molybdenum Electrodes under Conditions Where Ions are being Extracted," Invited paper, 27th Int'l Power Modulator Symposium and 2006 High Voltage Workshop, Washington D.C., May 14-18, 2006. 2006
56 Wilbur, P.J., M. Wilson, and J.D. Williams, "Emissive Membrane Ion Thrusters and Their Applications," 53rd JANNAF Meeting, Monterey, CA, Dec. 5-8, 2005. 2005
55 Wilbur, P.J., C.C. Farnell, and J.D. Williams, "Ion Thruster Optical Performance Enhancement via Ion-Emissive-Surface Shaping," IEPC-2005-95, 29th Int'l Electric Propulsion Conference, Princeton, NJ, Oct. 31-Nov. 4, 2005. 2005
54 Martin, R.H., C.C. Farnell, and J.D. Williams, "Direct and Remote Measurements of Plasma Properties Nearby Hollow Cathodes," IEPC-2005-294, 29th Int'l Electric Propulsion Conference, Princeton, NJ, Oct. 31-Nov. 4, 2005. 2005
53 Martinez, R.A. and J.D. Williams, "Electric Field Breakdown Characteristics of Carbon-based Ion Optics," IEPC-2005-284, 29th Int'l Electric Propulsion Conference, Princeton, NJ, Oct. 31-Nov. 4, 2005. 2005
52 Zoerb, K.A., J.D. Williams, D.D. Williams, and A.P. Yalin, "Differential Sputtering Yields of Refractory Metals by Xenon, Krypton, and Argon Ion Bombardment at Normal and Oblique Incidences," IEPC-2005-293, 29th Int'l Electric Propulsion Conference, Princeton, NJ, Oct. 31-Nov. 4, 2005. 2005
51 Yalin, A.P., V. Surla, and J.D. Williams, "Erosion Measurements by Cavity Ring-Down Spectroscopy for the VHITAL Program," IEPC-2005-299, 29th Int'l Electric Propulsion Conference, Princeton, NJ, Oct. 31-Nov. 4, 2005. 2005
50 Wilbur P.J., M. Wilson, K. Hutchings, and J.D. Williams, "The Emissive Membrane Ion Thruster Concept," IEPC-2005-164, 29th Int'l Electric Propulsion Conference, Princeton, NJ, Oct. 31-Nov. 4, 2005. 2005
49 Emhoff, J.W., I.D. Boyd, C.C. Farnell, and J.D. Williams, " Perveance and Beamlet Expansion Modeling of the NEXT Ion Engine," IEPC-2005-155, 29th Int'l Electric Propulsion Conference, Princeton, NJ, Oct. 31-Nov. 4, 2005. 2005
48 Li, Z., C.W. Hawk, M.S. Buttweiler, J.D. Williams, and B. Buchholtz, "Characterization of an 8-cm Diameter Ion Source System," AIAA-2005-3882, 41st Joint Propulsion Conference, Tucson, AZ, July 10-13, 2005. 2005
47 Yalin, A.P., V. Surla, J.D. Williams, and P.J. Wilbur, "Cavity Ring-Down Spectroscopy Measurements of Electric Propulsion Device Life Time", American Physical Society Mini-Conference on Plasma Propulsion, Savannah, GA, Nov. 2004. 2004
46 Williams J.D., M.L. Johnson, and D.D. Williams, "Differential Sputtering Behavior of Pyrolytic Graphite and Carbon-Carbon Composite Under Xenon Bombardment," AIAA 2004-3788, 40th Joint Propulsion Conference, Ft. Lauderdale, Florida, July 2004. 2004
45 Rawal, S. P., A.R. Perry, J.D. Williams, P.J. Wilbur, D.M. Laufer, W. Shih, W., J. Polaha, and A. Hoskins, "Performance Evaluation of 8-cm Diameter Ion Optics Assemblies Fabricated from Carbon-Carbon Composites," AIAA 2004-3614, 40th Joint Propulsion Conference, Ft. Lauderdale, Florida, July 2004. 2004
44 Martinez, R.A., M.S. Buttweiler, J.D. Williams, and G. Drummond, "Strategies for Performing Accelerated Wear Testing," AIAA-2004-3628, 40th Joint Propulsion Conference, Fort Lauderdale, Florida, July 2004. 2004
43 Williams J.D., C.C. Farnell, D.M. Laufer, and R.A. Martinez, "HiPEP Ion Optics System Evaluation Using Gridlets," AIAA-2004-3814, 40th Joint Propulsion Conference, Fort Lauderdale, Florida, July 2004. 2004
42 Farnell, C.C. and J.D. Williams, "Measurement of Ion Energy Distributions Produced within a NSTAR Discharge Chamber," AIAA-2004-3432, 40th Joint Propulsion Conference, Fort Lauderdale, Florida, July 2004. 2004
41 Enloe, C.L., L. Habash-Krause, M.G. McHarg, O. Nava, P.B. Shoemaker, E. Ehmann, and J.D. Williams, "Characterization of a Plasma Source for Ground-Based Simulation of LEO Plasma Conditions," AIAA-2004-5668, 2nd International Energy Conversion Engineering Conference, Providence, Rhode Island, August 2004. 2004
40 Yalin, A.P., V. Surla, J.D. Williams, and P.J. Wilbur, "Application of Cavity Ring-Down Spectroscopy to Sputter Erosion Measurements," Laser Applications to Chemical and Environmental Analysis (LACEA), Optical Society of America, Annapolis, MD, Feb. 2004. 2004
39 Williams, J.D., Casey C. Farnell, P.B. Shoemaker, J.A. Vaughn, and T.A. Schneider, "Ground Based Simulation of Low Earth Orbit Plasma Conditions," 8th Spacecraft Charging Conference, Huntsville, AL, Oct. 19-24, 2003. 2003
38 Polk, J.E., D.M. Goebel, J. Beatty, J.M. Monheiser, D. Giles, D. Hobson, F. Wilson, J. Christensen, M. DePano, S. Hart, W. Ohlinger, D.N. Hill, J.D. Williams, P.J. Wilbur, D.M. Laufer, and C.C. Farnell, "An Overview of the Nuclear Electric Xenon Ion System (NEXIS) Program," 39th Joint Propulsion Conference, AIAA-2003-3587, Huntsville, Alabama, July 20-23, 2003. 2003
37 J.D. Williams, D.M. Goebel, and P.J. Wilbur, "Analytical Model of Electron Backstreaming for Ion Thrusters," 39th Joint Propulsion Conference, AIAA-2003-4560, Huntsville, Alabama, July 20-23, 2003. 2003
36 Farnell, C.C., J.D. Williams, and P.J. Wilbur, "NEXT Ion Optics Simulation Via ffx," 39th Joint Propulsion Conference, AIAA-2003-4869, Huntsville, Alabama, July 20-23, 2003. 2003
35 Laufer, D.M., J.D. Williams, C.C. Farnell, P.B. Shoemaker, and P.J. Wilbur, "Experimental Evaluation Of Sub-Scale CBIO Ion Optics Systems," 39th Joint Propulsion Conference, AIAA 2003-5165, Huntsville, Alabama, July 20-23, 2003. 2003
34 Polk, J.E., J. Brophy, W. Shih, J.R. Beatty, D.M. Laufer, P.J. Wilbur, and J.D. Williams, "Large Carbon-Carbon Grids for High Power, High Specific Impulse Ion Thrusters," Space Technology and Applications International Forum Proceedings, STAIF 2003, edited by M. el-Genk, AIP Confernce Proceedings 654, New York, 2003. 2003
33 Yalin, A.P., J.D. Williams, and P.J. Wilbur, "Sputter Yield and Erosion Measurements For Ion Thruster Materials", Advanced Space Propulsion Workshop, Huntsville, Alabama, April 2003. 2003
32 Farnell, C.C., J.D. Williams, and P.J.Wilbur, "Numerical Simulation of Ion Thruster Optics," 28th International Electric Propulsion Conference, IEPC-03-073, Toulouse, France, March 17-21, 2003. 2003
31 Williams, J.D., D.M. Laufer, and P.J. Wilbur, "Experimental Performance Limits on High Specific Impulse Ion Optics," 28th International Electric Propulsion Conference, IEPC-03-128, Toulouse, France, March 17-21, 2003. 2003
30 Farnell, C.C., J.D. Williams, and P.J. Wilbur, "Characteristics of Energetic Ions Emitted from Hollow Cathodes," 28th International Electric Propulsion Conference, IEPC-03-072, Toulouse, France, March 17-21, 2003. 2003
29 Williams, J.D., M.M. Gardner, M.L. Johnson, and P.J. Wilbur, "Xenon Sputter Yield Measurements for Ion Thruster Materials," 28th International Electric Propulsion Conference, IEPC-03-130, Toulouse, France, March 17-21, 2003. 2003
28 Williams, J.D. and G. Aston, "Plasma Charge Balancing System to Enable Spacecraft Floating Potential Regulation," NAS5-00005, SBIR Phase II final report, Nov. 2001. 2001
27 Aston, G., M.B. Aston, and J.D. Williams, "The Shield System for Spacecraft Charge Control," 7th Spacecraft Charging Technology Conference, Noordwijk, The Netherlands, 23-27 April 2001. 2001
26 Aston, G., M.B. Aston, and J.D. Williams, "Miniature Plasma Activated Systems for Tether Current Generation," Space Technology and Applications International Forum-2001 (STAIF-2001), Albuquerque, New Mexico, 11-15 Feb. 2001. 2001
25 Aston, G., J.D. Williams, M.B. Aston, "Charging Hazard Event Controller System," AFRL-F19628-99-C-0047, SBIR Phase I final report, March 2000. 2000
24 Williams, J.D., G. Aston, and M.B. Aston, "New Technology Plasma Contactor," NAS8-98065, SBIR Phase II final report, Feb. 2000. 2000
23 Williams, J.D., G. Aston, and M.B. Aston, "Plasma Charge Balancing System to Enable Spacecraft Floating Potential Regulation," NAS5-99027, SBIR Phase I final report, June 1999. 1999
22 Aston, G., M.B. Aston, and J.D. Williams, "ProSEDS Plasma Contactor System," NAS8-98211, SBIR Phase III final report, Nov. 1998. 1998
21 Aston, G., M.B. Aston, and J.D. Williams, "Integrated Hollow Cathodes for Space Applications," 34th Joint Propulsion Conference and Exhibit, AIAA paper No. 98-3477, July 1998. 1998
20 Matossian, J.N., Ronghua Wei, and J.D. Williams, "Plasma-Based Ion Implantation and Electron-Bombardment for Large-Scale Surface Modification of Materials," International Workshop on Ion Beam Surface Technology, Tomsk, Russia, May 20-22, 1996. 1996
19 Williams, J.D. and J.R. Beattie, "Spacecraft Potential Control using Plasma Contactors," 3rd International Workshop on the Interrelationship Between Plasma Experiments in the Laboratory and in Space, IPELS'94, Pitlochry, Scotland, July 24-28, 1995. 1995
18 Williams, J.D. and J.R. Beattie, Vajo, J.J., J.D. Williams, R. Wei, R.G. Wilson, and J.N. Matossian, "Depth Distribution of Nitrogen in Silicon from Plasma Ion Implantation," 1994 International Conference on Plasma Science, ICOPS'94, Santa Fe, New Mexico, June 6-8, 1994. 1994
17 Beattie, J.R., J.D. Williams, and R.R. Robson, "Flight Qualification of an 18-mN Xenon Ion Thruster," 23rd International Electric Propulsion Conference, IEPC-93-106, Seattle, Washington, Sept. 13-16, 1993. 1993
16 Torres, E.R., J.N. Matossian, J.D. Williams, and M. Martinez-Sanchez, "Prediction of the Performance of an Ion Thruster Using Buckminster Fullerene as the Propellant," 29th Joint Propulsion Conference and Exhibit, AIAA 93-2494, Monterey, California, June 28-30, 1993. 1993
15 Beattie, J.R., J.D. Williams, and R.R. Robson, "Flight Qualification of an 18-mN Xenon Ion Thruster," Aerospace Design Conference, AIAA-93-1085, Irvine, California, Feb. 16-19, 1993. 1993
14 Gaeta, C.J., R.S. Turley, J.N. Matossian, J.R. Beattie, W.S. Williamson, and J.D. Williams, "Erosion Rate Diagnostics in Ion Thrusters Using Laser-Induced Fluorescence," 22nd International Electric Propulsion Conference, IEPC-91-098, Viareggio, Italy, Oct. 14-17, 1991. 1991
13 Beattie, J.R., R.R. Robson, and J.D. Williams, "18-mN Xenon Ion Propulsion Subsystem," 22nd International Electric Propulsion Conference, IEPC-91-010, Viareggio, Italy, Oct. 14-17, 1991. 1991
12 Williams, J.D. and P.J. Wilbur, "An Experimental Investigation of Hollow Cathode-Based Plasma Contactors," NASA CR-187120, pp. 1-114, May 1991. 1991
11 Williams, J.D., "Plasma Contactor Research - 1990," P.J. Wilbur, ed., NASA CR-187097, Annual Report, pp. 1-70, Jan. 1991. 1991
10 Monheiser, J.M., J.D. Williams, and P.J. Wilbur, "Plasma Contactor Get-Away-Special Experiment," AIAA Student Journal, V. 28, No. 4, pp. 22-23, Winter 1990-1991. 1991
9 Williams, J.D., "Plasma Contactor Research - 1989," P.J. Wilbur, ed., NASA CR-185212, Annual Report, pp. 1-62, Feb. 1990. 1990
8 Williams, J.D. and P.J. Wilbur, "Ground-Based Tests of Hollow Cathode Plasma Contactors," Third International Conference on Tethers in Space: Toward Flight, AIAA 89-1558-CP, San Francisco, California, May 17-19, 1989. 1989
7 Wilbur, P.J. and J.D. Williams, "Laboratory Experiments on Plasma Contactors," NASA Marshall Conference: Current Collection from Space Plasmas, NASA CP-3089, N. Singh, K.H. Wright, Jr., and N.H. Stone, eds., Huntsville, Alabama, April 24-25, 1989. 1989
6 Williams, J.D., "Plasma Contactor Research - 1989," P.J. Wilbur, ed., NASA CR-182283, Annual Report, pp. 1-51, Feb. 1989. 1989
5 Williams, J.D. and P.J. Wilbur, "Plasma Contacting - An Enabling Technology," 28th Aerospace Sciences Conference, AIAA 89-0677, Reno, Nevada, Jan. 9-12, 1989. 1989
4 Williams, J.D., "Electrodynamic Tether Plasma Contactor Research, " appears in "Space Plasma Contactor Research - 1987," P.J. Wilbur, ed., NASA CR-182148, Annual Report, pp. 1-78, Jan. 1988. 1988
3 Williams, J.D., P.J. Wilbur, and J.M. Monheiser, "Experimental Validation of a Phenomenological Model of the Plasma Contacting Process," Second International Conference on Tethers in Space: Space Tethers for Science in the Space Station Era, L. Guerriero and I. Bekey, eds., Societa Italiana Di Fisica, Vol. 14, pp. 245-253, Venice, Italy, Oct. 4-8, 1987. 1987
2 Wilbur, P.J. and J.D. Williams, "An Experimental Investigation of the Plasma Contacting Process," 26th Aerospace Sciences Conference, AIAA 87-0571, Reno, Nevada, Jan. 12-15, 1987. 1987
1 Williams, J.D., "Electrodynamic Tether Plasma Contactor Research," appears in "Advanced Electric Propulsion and Space Plasma Contactor Research," P.J. Wilbur, ed., NASA CR-180862, Annual Report, pp. 1-75, Jan. 1987. 1987
 

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