Control of Coherent Structures via External Drive of the Breathing Mode


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The Hall thruster exhibits two types of large-scale coherent structures: axially propagating breathing mode (m = 0) and azimuthal, with low m, typically m = 1, spoke mode. In our previous work, it was demonstrated that axial breathing mode can be controlled via the external modulations of the anode potential. Two regimes of the thruster response, linear and nonlinear, have been revealed depending on the modulation amplitude. In this work, using the high-speed camera images and developed image-processing technique, we have investigated the response of the azimuthal mode to the external modulations. We have found that, in linear regime, at low modulation voltages, axial and azimuthal structures coexist. At larger amplitudes, in the nonlinear regime, the azimuthal mode is suppressed, and only axial driven mode remains.

作者简介

I. Romadanov

Princeton Plasma Physics Laboratory; University of Saskatchewan

编辑信件的主要联系方式.
Email: ivr509@mail.usask.ca
美国, Princeton, NJ 08543; Saskatoon, SK S7N5E2

Y. Raitses

Princeton Plasma Physics Laboratory

Email: ivr509@mail.usask.ca
美国, Princeton, NJ 08543

A. Smolyakov

University of Saskatchewan

Email: ivr509@mail.usask.ca
加拿大, Saskatoon, SK S7N5E2

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