Studies of rotating spoke oscillations in cylindrical hall thrusters

Yevgeny Raitses, Martin Griswold, Leland Ellison, Jeffrey Parker, Nathaniel J. Fisch

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations

Abstract

In recent experiments with cylindrical and annular Hall thrusters, the enhanced cross-field electron transport induced by the rotating spoke was directly measured using a segmented anode. Approximately 50% of the total current was found to pass through the spoke. For the cylindrical Hall thrusters, the spoke oscillations were characterized using emissive and biased electrostatic probes and high speed imaging. The findings revealed a perturbed electric field which enhances electron transport across the field. Control and suppression of the spoke can be achieved by varying the effective boundaries of the thruster discharge from its cathode and anode sides. This includes recently demonstrated spoke suppression with a feedback control at the segmented anode. The magnetic field configuration of the thruster and the background gas pressure in the vacuum vessel can also affect the spoke oscillations.

Original languageEnglish (US)
Title of host publication48th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit 2012
StatePublished - Dec 1 2012
Event48th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit 2012 - Atlanta, GA, United States
Duration: Jul 30 2012Aug 1 2012

Publication series

Name48th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit 2012

Other

Other48th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit 2012
CountryUnited States
CityAtlanta, GA
Period7/30/128/1/12

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Aerospace Engineering
  • Control and Systems Engineering
  • Electrical and Electronic Engineering
  • Mechanical Engineering

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    Raitses, Y., Griswold, M., Ellison, L., Parker, J., & Fisch, N. J. (2012). Studies of rotating spoke oscillations in cylindrical hall thrusters. In 48th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit 2012 (48th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit 2012).