|Author||Soga, Yukihiro ♦ Mihara, Yasuhiro ♦ Park, Youngsoo|
|Source||United States Department of Energy Office of Scientific and Technical Information|
|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.|
|Learning Resource Type||Article|
|Publisher Place||United States|
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