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Title: Dynamics of two discrete vortices with different circulations composed of pure electron plasmas

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.

Authors:
; ;  [1]
  1. Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa, 920-1192 JAPAN (Japan)
Publication Date:
OSTI Identifier:
22490694
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1668; Journal Issue: 1; Conference: 11. international workshop on non-neutral plasmas, Takamatsu (Japan), 1-4 Dec 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ELECTRIC FIELDS; ELECTRODES; ELECTRONS; ORBITS; PLASMA; POTENTIALS; TRAPPING; TRAPS; TWO-DIMENSIONAL CALCULATIONS; TWO-DIMENSIONAL SYSTEMS; VELOCITY; VORTEX THEORY; VORTICES

Citation Formats

Soga, Yukihiro, Mihara, Yasuhiro, and Park, Youngsoo. Dynamics of two discrete vortices with different circulations composed of pure electron plasmas. United States: N. p., 2015. Web. doi:10.1063/1.4923113.
Soga, Yukihiro, Mihara, Yasuhiro, & Park, Youngsoo. Dynamics of two discrete vortices with different circulations composed of pure electron plasmas. United States. https://doi.org/10.1063/1.4923113
Soga, Yukihiro, Mihara, Yasuhiro, and Park, Youngsoo. 2015. "Dynamics of two discrete vortices with different circulations composed of pure electron plasmas". United States. https://doi.org/10.1063/1.4923113.
@article{osti_22490694,
title = {Dynamics of two discrete vortices with different circulations composed of pure electron plasmas},
author = {Soga, Yukihiro and Mihara, Yasuhiro and Park, Youngsoo},
abstractNote = {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.},
doi = {10.1063/1.4923113},
url = {https://www.osti.gov/biblio/22490694}, journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1668,
place = {United States},
year = {Mon Jun 29 00:00:00 EDT 2015},
month = {Mon Jun 29 00:00:00 EDT 2015}
}