Publications:

Hubble, A.A. and Foster, J.E. “Primary Electron Transport and Losses in a Ring-Cusp Discharge Chamber,” Proceedings of the 31st International Electric Propulsion Conference, Ann Arbor, IEPC-2009-156 (2009).

Hubble, A.A. and Foster, J.E. “Spatially Resolved Study of Inter-Cusp Transport and Containment of Primary Electrons,” Proceedings of the 46th Joint Propulsion Conference, Nashville, AIAA-2010-7110 (2010).

Gillman, Eric D., Foster, John E., and Blankson, Isaiah M., “Review of Leading Approaches for Mitigating Hypersonic Vehicle Communications Blackout and a Method of Ceramic Particulate Injection via Cathode Spot Arcs for Blackout Mitigation,” NASA Glenn Research Center, Cleveland, NASA TM-2010-216220.

Gillman, Eric D., and Foster, John E., “2-Dimensional Laser Imaging and Velocimetry of Cathode Spot Ejected Alumina Powder into an Overhead Plasma,” Proceedings of the 36th International Conference on Plasma Science, San Diego, May 31-June 5 2009, ICOPS Poster IP4L-102.Foster, J.E., Weatherford, B., Gilman E., and Yee, B., Plasma Sources Sci. Technol. 19 025001, 2010. View as a PDF Document

Foster, J.E. and Gillman, E.D., “Observation of cathode-spot phenomena at the surface of a dielectric-powder-covered electrode in the presence of a background plasma and applied magnetic field,” IEEE Transactions on Plasma Science, Vol. 37, No. 5, May 2009, 637. View as a PDF Document

Gillman, E.D., Cummings, P.G., and Foster, J.E., “Low power planar antenna inductive discharge ion source,” Proceedings of the 44th AIAA/ASM/SAE/ASEE Joint Propulsion Conference, Hartford, AIAA Paper 2008-5199. View as a PDF Document

Weatherford, B. and Foster, J., “Characterization of a waveguide ECR plasma source,” Proceedings of the 44th AIAA/ASM/SAE/ASEE Joint Propulsion Conference, Hartford, AIAA Paper 2008-4535. View as a PDF Document

Sommers, B. and Foster, J., “Characterization of ion acceleration processes in a surface ECR plasma source,” Proceedings of the 44th AIAA/ASM/SAE/ASEE Joint Propulsion Conference, Hartford, AIAA Paper 2008-4537.

Hubble, A. and Foster, J., “Plasma collection width measurements in a 10-cm ring cusp discharge chamber,” Proceedings of the 44th AIAA/ASM/SAE/ASEE Joint Propulsion Conference, Hartford, AIAA Paper 2008-4639. View as a PDF Document

Foster, J.E. and Gillman, E.D., “Magnetically Enhanced Inductive Discharge Chamber for Electric Propulsion Applications,” IEEE Transactions on Plasma Science, Vol. 36, No. 5, Oct. 2008, 2130.

Hikaka, Y., Foster, J.E., Getty, W.D., Gilgenbach, R.M., and Lau, Y.Y., “Performance and analysis of an electron cyclotron resonance plasma cathode,” J. Vac. Sci. Technol. A., Vol. 25, Issue 4, 2007, 781.

Foster, J.E., Williams, G.J., and Patterson, M.J., “Characterization of an Ion Thruster Neutralizer,” Journal of Propulsion and Power, Vol. 23, No. 4, 2007, 828.

C. H. Chen1, M.Q. Huang2, John Foster3, G. Monette4, J. Middleton4, A. Higgins, and S. Liu, “Effect of Surface Modification on the Mechanical Properties and Thermal Stability at 500°C of High Temperature Rare Earth Magnetic Materials,” Surface Coatings and Technology, Volume 201, Issue 6, 3430, 2006.

Foster, J.E., “Slot-antenna/permanent magnet device for generating plasma,” NASA Tech Brief, July 2007.LEW-175891-1

Nguyen, S., Lemmer, K., Gallimore, A., and Foster, J., “Characterizing species composition in radio frequency plasma produced from water vapor,” Proceedings of the International Electric Propulsion Conference, September 2007, Italy, IEPC Paper 2007-82.

Foster, J.E., Weatherford, B., and Sommers, B., “Electron and Ion Source ECR Plasma for Electric Propulsion Applications, Proceedings of the 2007 IEEE Pulsed Power and Plasma Science Conference, Albuquerque, June 17-22, 2007.

J.E. Foster, E.D. Gillman, B. Sommers, and B. Weatherford, “Magnetically Enhanced Inductive Source for Electric Propulsion Applications,” Proceedings of the 43rd AIAA/ASM/SAE/ASEE Joint Propulsion Conference, Cincinnati, July 8-11 2007, AIAA Paper 2007-5294

Foster, J.E., “Magnetically Enhanced Inductive Source for Electric Propulsion Applications,” Proceedings of the 43rd AIAA Joint Propulsion Conference, Cincinnati, July 8-11 2007, AIAA Paper 2007-5294.

Weatherford, B. and Foster, J., “Design and Preliminary Characterization of a Two-Stage Plasma Cathode for Space Applications,” Proceedings of the 36th International Conference on Plasma Science, San Diego, CA, May 31 – June 5, 2009, Poster No. IP3L-88

Weatherford, B. and Foster, J., “Initial Performance of a ECR Waveguide Plasma Cathode with Permanent Magnets,” Proceedings of the 31st AIAA International Electric Propulsion Conference, Ann Arbor, MI, Sept. 20 ? 24, 2009, Paper No. IEPC-2009-211

Weatherford, B., Foster, J., and Kamhawi, H., “Improved Performance of the ECR Waveguide Plasma Cathode with Permanent Magnets,” Proceedings of the 46th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, Nashville, TN, July 25-28, 2010, Paper No. AIAA-2010-6519

Journal Publications

1.    Gillman, E.D. and Foster, J.E., “Electron depletion via cathode spot dispersion of dielectric powder into an overhead plasma,” Accepted for publication, July 22, 2013, JVST-A.

2.    Foster, J.E., Adamovsky, G., Gucker, S., and Blankson, I., “A Comparative study of the time-resolved decomposition of methylene blue dye under the action of a repetitively pulsed, ns DBD plasma jet using liquid chromatography and spectrophotometry,” Vol. 41, 503, 2013.

3.    Weatherford, B.R., Barnet, E., and Foster, J.E., “Two-dimensional laser collision-induced fluorescence measurements of plasma properties near an RF plasma cathode extraction aperture,” Plasma Sources, Science and Technology, 21, 055030, 2012.

4.    Sommers, B.S., and Foster, J.E., “Nonlinear Oscillation of Gas Bubbles Submerged in Water: Implications for Plasma Breakdown,” Journal of Physics D, Applied Physics, 45, 415203, 2012.

5.    Hubble, A.A., and Foster, J.E., “Spatially Resolved study of low beta primary electron containment in magnetic cusps,” Journal of Vacuum Science and Technology A, 30, 011301, 2012.

6.    Hubble, A. and Foster, J.E., “A comparison between measured and predicted field distribution produced by a permanent magnet,” Journal of Propulsion and Power, Vol. 28, no. 5, Sept.-Oct. 2012.

7.    Foster, J.E. et al, “Perspectives on the Interaction of Plasmas with Liquid Water for Water Purification,” IEEE Trans. Plasma Science, Vol. 40, no. 5, 1311, 2012.

8.    Weatherford, B.R., Foster, J.E., and Kamhawi, H., “Electron Current Extraction from permanent magnet waveguide plasma cathode,” Rev. Sci. Instruments, 82, 093507, 2011.

9.    Gillman, E.D., and Foster, J.E., “Dust ejection and stream formation via cathode spot ignition at the surface of a dielectric covered electrode,” IEEE Trans. Plasma Science, Vol. 39, No. 11, 2770, 2011.

10. Weatherford, B.R. and Foster, J.E., “Visible plume from a low-power ecr waveguide plasma cathode for electric propulsion systems,” IEEE Trans. Plasma Science, Vol. 39, 2942, 2011.

11. Wang, M., Foster, J., and Kushner, M., “Plasma propagation through porous dielectric sheets,” IEEE Trans. Plasma Science, Vol. 39, 2244, 2011.

12. Weatherford, B.R., Barnet, E., and Foster,J.E., “Two-dimensional LCIF images of electron density and temperature within an ECR plasma cathode,” IEEE Trans. Plasma Science, 39, 11, 2486, 2011.

13. Foster, J.E et al, “Evolution of underwater DBD plasma jet,” IEEE Trans. Plasma Science, 39, 11, 2666, 2011.

14. Sommers, B., Foster, J.E., and Kushner, M.J., “Observations of electric discharge streamer propagation and capillary oscillations on the surface of air bubbles in water,” J. Physics D: Appl. Phys., 44, 082001, 2011.

15. Foster, J.E., “Characterization of the evolution of underwater DBD plasma jet,” Plasma Sources Sci. Technol. 20, 034018, 2011.

16. Gillman, E. and Foster, J.E., “Laser imaging and velocimetry of cathode spot ejected ceramic powder,” IEEE Trans. Plasma Science, 39, 10, 2022, 2011.

17. Gillman, E., Foster, J.E., and Blankson, I., “Review of leading approaches for mitigating hypersonic communications blackout and a method of ceramic particulate injection via cathode spot arcs for blackout mitigation,” NASA TM 2010-216220.

18. Foster, J.E., Weatherford, B., and Gillman, E., “Underwater DBD Plasma Jet,” Plasma Sources Science and Technology, 19 025001, 2010.

19. Nguyen, S.V.T., Foster, J.E., and Gallimore, A.D., “Operating a radio-frequency plasma source on water vapor,” Rev. Sci. Instrum. 80, 083503, 2009.

20. Foster,J.E. and Gillman, E., “Observation of cathode spot phenomena at the surface of dust-covered electrode in the presence of a background plasma and applied magnetic field,” IEEE Trans. Plasma Science, Vol. 37, No. 5, 637, 2009.

21. Mandell, M., Davis, V., Pencil, E., Patterson, M., McEwen, H., Foster, J., and Synder, J., “Modeling the NEXT Multithruster Array Test with Nascp-2k,” IEEE Transactions on Plasma Science, Vol. 36, Number 5,2309, 2008.
22. Foster, J.E. and Gillman, E., “Magnetically enhanced inductive discharge chamber for electric propulsion applications,” IEEE Transactions on Plasma Science, Vol. 36, Number 5,2130, 2008.

23. Hidaka, Y., Foster, J.E., Getty, W.D., Gilgenbach, R.M., and Lau, Y.Y., “Performance and analysis of an electron cyclotron resonance plasma cathode,” J. Vac. Sci. Technol. A., Vol. 25, Issue 4, 2007, 781.

24. Foster, J.E., Williams, G.J., and Patterson, M.J., “Characterization of an Ion Thruster Neutralizer,” Journal of Propulsion and Power, Vol. 23, No. 4, 828, 2007.

25. C. H. Chen1, M.Q. Huang2, John Foster3, G. Monette4, J. Middleton4, A. Higgins, and S. Liu, “Effect of Surface Modification on the Mechanical Properties and Thermal Stability at 500°C of High Temperature Rare Earth Magnetic Materials,” Surface Coatings and Technology, Volume 201, Issue 6, 3430, December 2006.

Conference Papers

1.    Sommers, B.S. and Foster, J.E., “Plasma Ignition in Free Standing Bubbles,” Proceedings of the 2013 IEEE Pulsed Power and Plasma Science Meeting, June 16-21, San Francisco, 2013.

2.    Gucker, S.N., Yee, B., and Foster, J.E., “Plasma treatment of contaminated liquid water: a comparison between steam bubble and gas bubble discharge,” Proceedings of the 2013 IEEE Pulsed Power and Plasma Science Meeting, June 16-21, San Francisco, 2013.

3.    Gucker, S.N., Foster, J.E., Ranieri, P., Ray, A., Kopelman, K., “Quantifying the effect of plasma irradiation on internal properties of living cells,” Proceedings of the 2013 IEEE Pulsed Power and Plasma Science Meeting, June 16-21, San Francisco, 2013.

4.    Hubble, A.A., and Foster, J.E., “Experimental assessment of bulk plasma distribution in a multi-cusp device,” Proceedings of the 2013 IEEE Pulsed Power and Plasma Science Meeting, June 16-21, San Francisco, 2013.

5.    Yee, B.T., Weatherford, B.R., Barnat, E.V., and Foster, J.E., “Electron energies in a helium pulsed nanosecond discharge,” ,” Proceedings of the 2013 IEEE Pulsed Power and Plasma Science Meeting, June 16-21, San Francisco, 2013.

6.    Patterson, M.J., Foster, J.E., Young, J. A., and Crofton, M.W., “Annular Engine Development Status,” Proceedings of the 49th AIAA Joint Propulsion Conference, 14-17 July, San Jose, CA., AIAA Paper Number 2013-3892, 2013.

7.    Gucker, S.N., Garcia, M.C., Garcia, and Foster, J.E., “Optical emission spectroscopy of an underwater DBD plasma jet,” PS3-039, Proceedings of the XXXI International Conference on Phenomena in Ionized Gases, Granada, Spain, July 14-19, 2013.

8.    Hubble, A. and Foster, J.E., “Experimental Assessment of Plasma transport in a 16 cm Multicusp Device,” Proceedings of the 65th Annual Gaseous Electronics Conference, Oct. 22-26, Austin Texas, 2012.

9.    Yee, B., Weatherford, B.R., Barnat, E., and Foster, J.E., “Estimates of electric field in fast ionization waves,” Proceedings of the 65th Annual Gaseous Electronics Conference, Oct. 22-26, Austin Texas, 2012.

10. Sommers, B., and Foster, J.E., “Plasma formation inside deformed gas bubbles submerged in water,” Proceedings of the 65th Annual Gaseous Electronics Conference, Oct. 22-26, Austin Texas, 2012.

11. Nowak-Gucker, S.M., Garcia, M., Yee, B., and Foster, J.E.,” Time resolved spectroscopy: Dynamic Study of a Dielectric Barrier Plasma,” Proceedings of the 65th Annual Gaseous Electronics Conference, Oct. 22-26, Austin Texas, 2012.

12. Sawlani, K., Herzog, J.M., Kwak, J., Foster, J.E., “Influence of secondary electrons produced from plasma material interaction in the presence of crossed electric and magnetic fields,” Proceedings of the 65th Annual Gaseous Electronics Conference, Oct. 22-26, Austin Texas, 2012.

13. Gillman, E., and Foster, J.E., “Plasma electron depletion via cathode spot injection of dielectric particles,” Proceedings of the 54th Annual Meeting of the APS Division of Plasma Physics, Vol. 57, No. 12, Oct. 29-Nov. 2 2012, Providence Rhode Island, 2012.
14. Nowak-Gucker, S.M. and Foster, J.E., “Time resolved spectroscopy of an underwater dielectric barrier discharge jet,” Proceedings of the 39th IEEE International Conference on Plasma Science, 8-12, July 2012, Scotland.

15. Hubble, A.A. and Foster, J.E.,” Evaluation of plasma transport in a multipole ion source and its impact on discharge performance,” Proceedings of the 39th IEEE International Conference on Plasma Science, 8-12, July 2012, Scotland.

16. Foster, J.E., Gucker, S., Blankson, I., and Adamovsky, G., “Analysis of the decomposition of methylene blue dye under the action of a pulsed DBD plasma jet,” Proceedings of the 39th IEEE International Conference on Plasma Science, 8-12, July 2012, Scotland.

17. Foster, J., et al, “Performance of a 50 cm Ion Thruster Discharge Chamber,” Proceedings of the 48th AIAA Joint Propulsion Conference, 30 July-1 August 2012, Atlanta, AIAA paper 2012-3795, 2012.

18. Shastry, R., Patterson, M., Herman, D., and Foster, J., “Current density measurements of an annular- geometry ion engine,” Proceedings of the 48th AIAA Joint Propulsion Conference, 30 July-1 August 2012, Atlanta, AIAA paper 2012-4186, 2012.

19. Foster, J.E., “An investigation of plasma formation in electromechanically driven free bubbles at resonance in water with applications for the treatment of contaminated water,” 2012 NSF CBET Conference. (Invited Talk and poster)

20. Patterson, M., Herman, D., and Foster, J., “Annular-Geometry Ion Engine: Concept, Development Status, and Preliminary Performance,” Proceedings of the 48th AIAA Joint Propulsion Conference, 30 July-1 August 2012, Atlanta, AIAA paper 2012-3798, 2012.

21. Foster, J.E., “Mission Enabling: The plasma sources of electric propulsion—challenges and prospects for the future,” Invited, Proceedings of the 64th Annual APS Gaseous Electronics Conference, 15-18 November 2011, Salt Lake City, 2011.

22. Sommers, B. and Foster, J.E., “Nonlinear oscillations of gas bubbles and their impact on plasma breakdown in water,” Proceedings of the 64th Annual APS Gaseous Electronics Conference, 15-18 November 2011, Salt Lake City, 2011.

23. Weatherford, B.R., Foster, J.E., and Barnat, E.V., “Two-Dimensional Laser Collision-Induced Fluorescence Mapping of Electron Density and Temperature near Plasma Cathode Apertures,” Proceeding of the 38th IEEE International Conference on Plasma Science, June 26-30, Chicago, 2011.

24. Hubble, A.A. and Foster, J.E., “Addressing issues in probing the Magnetic Cusp Region,” Proceeding of the 38th IEEE International Conference on Plasma Science, June 26-30, Chicago, 2011.

25. Nowak, S.M., and Foster, J.E., “Power studies of an underwater DBD Plasma Jet,” Proceeding of the 38th IEEE International Conference on Plasma Science, June 26-30, Chicago, 2011.

26. Gillman, E.D., and Foster, J.E., “Time-Resolved Plasma Density Measurements in a Dusty Plasma Created via Cathode Spot Powder Dispersion,” Proceeding of the 38th IEEE International Conference on Plasma Science, June 26-30, Chicago, 2011.

27. Blankson, I., and Foster, J.E., “Non-equilibrium plasma applications for water purification supporting human spaceflight and terrestrial point of use: Organic chemical decomposition via HV nanosecond plasma discharge,” Proceedings of the 7th International Workshop And Exhibition on Plasma Assisted Combustion, Las Vegas, September 12-15, 2011.

28. Sawlani, K.U., and Foster, J.E., “Aerodynamically enhanced atmospheric pressure plasma jet for polymer treatment,” Proceeding of the 38th IEEE International Conference on Plasma Science, June 26- 30, Chicago, 2011.

29. Sommers, B.S. and Foster, J.E., “Resonant Oscillations of Air Bubbles Driven by a Time Varying Electric Field,” Proceeding of the 38th IEEE International Conference on Plasma Science, June 26-30, Chicago, 2011.

30. Foster, J.E., “Towards the purification of Liquid Water by Direct Plasma Injection: Technical Challenges and Ongoing Efforts at the University of Michigan Plasma Science and Technology Laboratory,” Invited, Proceeding of the 38th IEEE International Conference on Plasma Science, June 26-30, Chicago, 2011.
31. Foster, J.E. et al, “An overview of plasma-in-liquid experimental studies at the University of Michigan’s Plasma Science and Technology Laboratory,” APS 52nd Annual Meeting of the Division of Plasma Physics, Vol. 55, no. 15, Nov. 8-10 2010, Chicago, Ill.

32. Gillman, E., Foster, J.E., and Blankson, I., “Cathode Spot Ejection Particle Imaging,” Proceedings of the 37th International Conference on Plasma Science, Norfolk, VA, June 20-24, 2010.

33. Hubble, A.A., and Foster, J.E., “Spatially Resolved Study of Inter-cusp Transport and Containment of Primary Electrons in a Line Cusp Source, Proceedings of the 37th International Conference on Plasma Science, Norfolk, VA, June 20-24, 2010.

34. Foster, J.E., et al, “Investigation of DBD Underwater Plasma Jet Properties and its Interaction with a Solid Substrate,” Proceedings of the 37th International Conference on Plasma Science, Norfolk, VA, June 20-24, 2010.

35. Sommers, B., and Foster, J.E., “Investigation of plasma formation in harmonically driven bubbles,” Proceedings of the 37th International Conference on Plasma Science, Norfolk, VA, June 20-24, 2010.

36. Yee, B.T, Foster, J.E., “Non-intrusive measurement of the electric field in pulsed nanosecond discharges for plasma aided combustion,” Proceedings of the 37th International Conference on Plasma Science, Norfolk, VA, June 20-24, 2010.

37. Weatherford, B.R., Foster, J.E., and Kamhawi, H., “Improved performance of the ECR waveguide plasma cathode with permanent magnets,” AIAA Paper 2010-6519, Proceedings of the 46th AIAA Joint Propulsion Conference, 25-28 July, 2010

38. Sommers, B. and Foster, J.E “Development of a microwave cusp accelerator driven by electron cyclotron resonance,” AIAA Paper 2010-6518, Proceedings of the 46th AIAA Joint Propulsion Conference, 25-28 July, 2010.

39. Hubble, A. and Foster, J.E., “Spatial resolved study of intercusp transport and containment of primary electrons,” AIAA Paper 2010-7110, Proceedings of the 46th AIAA Joint Propulsion Conference, 25-28 July, 2010.

40. Foster, J.E., Weatherford, B.R., Gupta, M., Gillman, E., and Yee, B., “Characterization of DBD plasma jet,” Proceedings of the 2009 APS Gaseous Electronics Conference, Saratoga Springs, 2009.

41. Hubble, A. and Foster, J.E., “Particle attenuation and losses in a ring cusp discharge chamber,” Proceedings of the 2009 International Conference on Electric Propulsion, IEPC156 -2009.

42. Weatherford, B.R., and J.E. Foster, “Performance of a two stage plasma cathode,” Proceedings of the 2009 International Conference on Electric Propulsion, IEPC 211-2009.

43. Sawlani, K., and Foster, J.E., “Comparison of Various Numerical Schemes to Obtain EEDF with High Accuracy,” Proceedings of the 2009 International Conference on Electric Propulsion, IEPC -2009.

44. Foster, J.E., Weatherford, B.R., and Gillman, E.D., “Heating and Chemical Reactivity of a Low Frequency, DBD Plasma Jet in Liquid, Proceedings of the 36th International Conference on Plasma Science and the 23rd Symposium on Fusion Engineering, San Diego, 2009.

45. Gillman, E.D. and Foster, J.E., “Investigation of an RF Plasma Afterglow with a Cathode Spot Driven Quenching Method for Spacecraft Reentry Blackout Mitigation, Proceedings of the 36th International Conference on Plasma Science and the 23rd Symposium on Fusion Engineering, San Diego, 2009.

46. Weatherford, B.R. and Foster, J.E., “Design and preliminary characterization of a Two-Stage Plasma Cathode for Space Applications,” Proceedings of the 36th International Conference on Plasma Science and the 23rd Symposium on Fusion Engineering, San Diego, 2009.

47. Nguyen, S.V.T., Foster, J.E., and Gallimore, A.D., “Characterization of a Water Radiofrequency Plasma-An experimental study,” Proceedings of the 36th International Conference on Plasma Science and the 23rd Symposium on Fusion Engineering, San Diego, 2009.

48. Hubble, A. and Foster, J., “Plasma collection width measurements in a 10-cm ring cusp discharge chamber,” Proceedings of the 44th AIAA/ASM/SAE/ASEE Joint Propulsion Conference, Hartford, AIAA Paper 2008-4639.

49. Sommers, B. and Foster, J., “Characterization of ion acceleration processes in a surface ECR plasma source,” Proceedings of the 44th AIAA/ASM/SAE/ASEE Joint Propulsion Conference, Hartford, AIAA Paper 2008-4537. (Submitted for publication August, 2008)
50. Gillman, E.D., Cummings, P.G., and Foster, J.E., “Low power planar antenna inductive discharge ion source,” Proceedings of the 44th AIAA/ASM/SAE/ASEE Joint Propulsion Conference, Hartford, AIAA Paper 2008-5199

51. Weatherford, B. and Foster, J., “Characterization of a waveguide ECR plasma source,” Proceedings of the 44th AIAA/ASM/SAE/ASEE Joint Propulsion Conference, Hartford, AIAA Paper 2008-4535.

52. Nguyen, S., Lemmer, K., Gallimore, A., and Foster, J., “Characterizing species composition in radio frequency plasma produced from water vapor,” Proceedings of the International Electric Propulsion Conference, September 2007, Italy, IEPC Paper 2007-82.

53. Foster, J.E., Weatherford, B., and Sommers, B., “Electron and Ion Source ECR Plasma for Electric Propulsion Applications, Proceedings of the 2007 IEEE Pulsed Power and Plasma Science Conference, Albuquerque, June 17-22, 2007.

54.    Foster, J.E., “Magnetically Enhanced Inductive Source for Electric Propulsion Applications,” Proceedings of the 43rd AIAA Joint Propulsion Conference, Cincinnati, July 8-11 2007, AIAA Paper 2007-5294.

55. Foster, J.E., Pencil, E., McEwen, H.,Patterson, M.J., Diaz, E., and Van Noord, J., “Neutralizer Plasma Coupling in a NEXT Multi-thruster array”, AIAA Paper 2006-5184, 42nd Joint Propulsion Conference and Exhibit, Sacramento, CA, July 2006

56. Pencil, E.J., Foster, J.E., Patterson, M.J., Diaz, E., Van Noord, J., and McEwen, H., “Ion Beam Characterization of NEXT Multi-Thruster Array Plume,” AIAA-2006-5182, 42nd Joint Propulsion Conference and Exhibit, Sacramento, CA, July 2006.

57. McEwen, H., Foster, J.E., Pencil, E.,Patterson, M.J., Diaz, E., and Van Noord, J., “Characterization of Plasma Flux Incident on a Multi-Thruster Array,” AIAA Paper 2006-5183, 42nd Joint Propulsion Conference and Exhibit, Sacramento, CA, July 2006.

58. Foster, J.E., Pencil, E., Patterson, M.J., McEwen, H., Diaz, E., and Van Noord, J., “Plasma Characteristics Measured in the Plume of a NEXT Multi-Thruster Array,” AIAA Paper 2006-5181, 42nd Joint Propulsion Conference and Exhibit, Sacramento, CA, July 2006.

59. Patterson, M.J., Foster, J., McEwen, Herman, D., Pencil, E., and VanNoord, J., “NEXT Multi-Thruster Array Test-Engineering Demonstration,” AIAA Paper 2006-5180, Proceedings of the 42nd Joint Propulsion Conference, Sacramento, CA, July 2006.

60. Williams, G.J, Haag, T.W., Foster, J.E., Van Noord, Patterson, M.J., “Results of the 2000 hr Wear Test of the HiPEP Ion Thruster with Pyrolytic Graphite Ion Optics,” Proceedings of the 42ed Joint Propulsion Conference, AIAA 2006-4668.