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Title: Recommended Practice for Use of Emissive Probes in Electric Propulsion Testing

Here, this article provides recommended methods for building, operating, and taking plasma potential measurements from electron-emitting probes in electric propulsion devices, including Hall thrusters, gridded ion engines, and others. The two major techniques, the floating point technique and the inflection point technique, are described in detail as well as calibration and error-reduction methods. The major heating methods are described as well as the various considerations for emissive probe construction. Lastly, special considerations for electric propulsion plasmas are addressed, including high-energy densities, ion flows, magnetic fields, and potential fluctuations. Recommendations for probe design and operation are provided.
Authors:
 [1] ; ORCiD logo [2] ;  [3] ;  [4]
  1. Univ. of Michigan, Ann Arbor, MI (United States)
  2. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  3. University of Wisconsin, Madison, WI (United States)
  4. Naval Research Laboratory, Washington, D.C. (Unietd States)
Publication Date:
Grant/Contract Number:
FG02-97ER54437; 3001346357
Type:
Accepted Manuscript
Journal Name:
Journal of Propulsion and Power
Additional Journal Information:
Journal Volume: 33; Journal Issue: 3; Journal ID: ISSN 0748-4658
Research Org:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 33 ADVANCED PROPULSION SYSTEMS; charge limited emission; plasma potential measurements; fast time; evolutions; space-charge; hall-thrusters; electrostatic-probe; temperature plasma; emitting electrode; fluid model; magnetron discharge
OSTI Identifier:
1378103