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Electron Backstreaming Mitigation via a Magnetic Grid (2002)

Roman, Robert F. ; Soulas, George C. ; Foster, John F. ; [et al.]

In: CASI

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Publication Date: 2019-08-13

Description: Electron backstreaming due to accelerator grid hole enlargement has been identified as a failure mechanism that will limit ion thruster service lifetime. Over extended periods of time as accelerator grid apertures enlarge due to erosion, ion thrusters are required to operate at increasingly higher accelerator grid voltages in order to prevent electron backstreaming. These higher voltages give rise to higher grid erosion rates, which in turn accelerates aperture enlargement. Presented here is an approach to mitigate the backflow of electrons into the engine by using a transverse magnetic field.

Keywords: Spacecraft Propulsion and Power

Type: NASA/TM-2002-211283 , E-13083 , NAS 1.15:211283 , IEPC-01-91 , 27th International Electric Propulsion Conference; Oct 14, 2001 - Oct 19, 2001; Pasadena, CA; United States

Format: application/pdf

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