NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Transport of Sputtered Carbon During Ground-Based Life Testing of Ion ThrustersHigh voltage, high power electron bombardment ion thrusters needed for deep space missions will be required to be operated for long durations in space as well as during ground laboratory life testing. Carbon based ion optics are being considered for such thrusters. The sputter deposition of carbon and arc vaporized carbon flakes from long duration operation of ion thrusters can result in deposition on insulating surfaces, causing them to become conducting. Because the sticking coefficient is less than one, secondary deposition needs to be considered to assure that shorting of critical components does not occur. The sticking coefficient for sputtered carbon and arc vaporized carbon is measured as well as directional ejection distribution data for carbon that does not stick upon first impact.
Document ID
20050186905
Document Type
Technical Memorandum (TM)
Authors
Marker, Colin L. (Worcester Polytechnic Inst. MA, United States)
Clemons, Lucas A. (Worcester Polytechnic Inst. MA, United States)
Banks, Bruce A. (NASA Glenn Research Center Cleveland, OH, United States)
Miller, Sharon (NASA Glenn Research Center Cleveland, OH, United States)
Snyder, Aaron (NASA Glenn Research Center Cleveland, OH, United States)
Hung, Ching-Cheh (NASA Glenn Research Center Cleveland, OH, United States)
Karniotis, Christina A. (QSS Group, Inc. Cleveland, OH, United States)
Waters, Deborah L. (QSS Group, Inc. Cleveland, OH, United States)
Date Acquired
September 7, 2013
Publication Date
June 1, 2005
Subject Category
Spacecraft Propulsion and Power
Report/Patent Number
AIAA Paper 2005-4413
E-15156
NASA/TM-2005-213798
Meeting Information
Joint Propulsion Conference(Tuscon, AZ)
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Available Downloads

NameType 20050186905.pdf STI