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Author Soga, Yukihiro ♦ Mihara, Yasuhiro ♦ Park, Youngsoo
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PLASMA PHYSICS AND FUSION TECHNOLOGY ♦ ELECTRIC FIELDS ♦ ELECTRODES ♦ ELECTRONS ♦ ORBITS ♦ PLASMA ♦ POTENTIALS ♦ TRAPPING ♦ TRAPS ♦ TWO-DIMENSIONAL CALCULATIONS ♦ TWO-DIMENSIONAL SYSTEMS ♦ VELOCITY ♦ VORTEX THEORY ♦ VORTICES
Abstract Two-dimensional dynamics of two vortex strings with different circulations were experimentally observed. The strings were composed of pure electron plasmas and were confined in a Malmberg–Penning trap. When one of the two vortices trapped in a conventional potential well had weak circulation, the orbits of the two vortices contradicted the point vortex theory. This disagreement stems from an unavoidable external electric field that exerts a different additional E × B drift velocity on each vortex. We resolved the discrepancy between observation and theory by applying a stepwise potential to the end electrodes, which produced a less non-ideal electric field.
ISSN 0094243X
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-06-29
Publisher Place United States
Volume Number 1668
Issue Number 1


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