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The National Technical Information Service acquires, indexes, abstracts, and archives the largest collection of U.S. government-sponsored technical reports in existence. The NTRL offers online, free and open access to these authenticated government technical reports. Technical reports and documents in its repository may be available online for free either from the issuing federal agency, the U.S. Government Publishing Office’s Federal Digital System website, or through search engines.

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Space Charge Saturated Sheath Regime and Electron Temperature Saturation in Hall Thrusters.

DE2005837855

Publication Date	2005
Personal Author	Raitses, Y.; Staack, D.; Smirnov, A.; Fisch, N. J.
Page Count	52
Abstract	Secondary electron emission in Hall thrusters is predicted to lead to space charge saturated wall sheaths resulting in enhanced power losses in the thruster channel. Analysis of experimentally obtained electron-wall collision frequency suggests that the electron temperature saturation, which occurs at high discharge voltages, appears to be caused by a decrease of the Joule heating rather than by the enhancement of the electron energy loss at the walls due to a strong secondary electron emission.
Keywords	Electron emission Electron temperature Thrusters Electrons Joule heating Power losses Saturation Space charge Ion sources Plasma diagnostics Sheath Probes Plasma-wall interaction
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Princeton Univ., NJ. Plasma Physics Lab.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200522

Space Charge Saturated Sheath Regime and Electron Temperature Saturation in Hall Thrusters.

Space Charge Saturated Sheath Regime and Electron Temperature Saturation in Hall Thrusters.
DE2005837855

Publication Date	2005
Personal Author	Raitses, Y.; Staack, D.; Smirnov, A.; Fisch, N. J.
Page Count	52
Abstract	Secondary electron emission in Hall thrusters is predicted to lead to space charge saturated wall sheaths resulting in enhanced power losses in the thruster channel. Analysis of experimentally obtained electron-wall collision frequency suggests that the electron temperature saturation, which occurs at high discharge voltages, appears to be caused by a decrease of the Joule heating rather than by the enhancement of the electron energy loss at the walls due to a strong secondary electron emission.
Keywords	Electron emission Electron temperature Thrusters Electrons Joule heating Power losses Saturation Space charge Ion sources Plasma diagnostics Sheath Probes Plasma-wall interaction
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Princeton Univ., NJ. Plasma Physics Lab.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200522