Measurements of Secondary Electron Emission Effects in the Hall Thruster Discharge Page: 3 of 18
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Measurements of secondary electron emission effects in the Hall thruster discharge
Y. Raitses,* A. Smirnov, D. Staack and N. J. Fisch
Princeton Plasma Physics Laboratory, Princeton, NJ 08543
The dependence of the maximum electron temperature on the discharge voltage is studied
for two Hall thruster configurations, in which a collisionless plasma is bounded by
channel walls made of materials with different secondary electron emission (SEE)
properties. The linear growth of the temperature with the discharge voltage, observed in
the channel with a low SEE yield, suggests that SEE is responsible for the electron
temperature saturation in the thruster configuration with the channel walls having a
higher SEE yield. The fact that the values of the electron temperature at saturation are
rather high may indirectly support the recently predicted kinetic regime of the space
charge saturation of the near-wall sheath in the thruster discharge. We also observed a
correlation between the effects of the channel wall material on the electron temperature
and the electron cross-field current.
* E-mail: yraitses@pppl.gov1
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Raitses, Y.; Smirnov, A.; Staack, D. & Fisch, N. J. Measurements of Secondary Electron Emission Effects in the Hall Thruster Discharge, report, December 1, 2005; Princeton, New Jersey. (https://digital.library.unt.edu/ark:/67531/metadc897536/m1/3/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.