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19 Apr 2004

Volume 84, Issue 16, pp. 2971-3207

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Appl. Phys. Lett. 84, 3139 (2004); http://dx.doi.org/10.1063/1.1710717 (3 pages)

Slava V. Rotkin and Karl Hess
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Temperature gradient in Hall thrusters

D. Staack, Y. Raitses, and N. J. Fisch

Appl. Phys. Lett. 84, 3028 (2004); http://dx.doi.org/10.1063/1.1710732 (3 pages) | Cited 14 times

Online Publication Date: 13 April 2004

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Plasma potentials and electron temperatures were deduced from emissive and cold floating probe measurements in a 2 kW Hall thruster, operated in the discharge voltage range of 200–400 V. An almost linear dependence of the electron temperature on the plasma potential was observed in the acceleration region of the thruster both inside and outside the thruster. This result calls into question whether secondary electron emission from the ceramic channel walls plays a significant role in electron energy balance. The proportionality factor between the axial electron temperature gradient and the electric field is also significantly smaller than might be expected by fluid models. © 2004 American Institute of Physics.
Show PACS
52.25.-b Plasma properties
52.70.Ds Electric and magnetic measurements
52.75.Di Ion and plasma propulsion
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