PPPL-3622 is available in <a href="PPPL-3622.pdf">pdf</a> or 
<a href="PPPL-3622.ps">postscript</a> formats.

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<b>High-frequency Probing Diagnostic for Hall Current Plasma Thrusters</b>
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<b>Authors:</b> A.A. Litvak, Y. Raitses, and N.J. Fisch
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<b>Date of PPPL Report:</b> October 2001
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<b>Published in:</b> Review of Scientific Instruments <b>73</b> (August 2002) 2882-2885.</p>


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High-frequency oscillations (1-100 MHz) in Hall thrusters have apparently eluded significant experimental scrutiny. A diagnostic setup, consisting of single Langmuir probe, special shielded probe connector-positioner, and electronic impedance-matching circuit, was successfully built and calibrated. Through simultaneous high-frequency probing of the Hall thruster plasma at multiple locations, high-frequency plasma waves have been identified and characterized for various thruster operating conditions.




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