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Title: Vortex motion of dust particles due to non-conservative ion drag force in a plasma

Vortex motion of the dust in a dusty plasma is shown to result because non-parallelism of the ion density gradient and the gradient of the magnitude of the ion ambipolar velocity cause the ion drag force on dust grains to be non-conservative. Furthermore, dust grain poloidal vortices consistent with the model predictions are experimentally observed, and the vortices change character with imposed changes in the ion temperature profile as predicted. For a certain ion temperature profile, two adjacent co-rotating poloidal vortices have a well-defined X-point analogous to the X-point in magnetic reconnection.
Authors:
ORCiD logo [1] ; ORCiD logo [1]
  1. California Inst. of Technology (CalTech), Pasadena, CA (United States)
Publication Date:
Grant/Contract Number:
SC0010471
Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 23; Journal Issue: 2; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Research Org:
California Inst. of Technology (CalTech), Pasadena, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
OSTI Identifier:
1469680
Alternate Identifier(s):
OSTI ID: 1237983

Chai, Kil -Byoung, and Bellan, Paul M. Vortex motion of dust particles due to non-conservative ion drag force in a plasma. United States: N. p., Web. doi:10.1063/1.4941973.
Chai, Kil -Byoung, & Bellan, Paul M. Vortex motion of dust particles due to non-conservative ion drag force in a plasma. United States. doi:10.1063/1.4941973.
Chai, Kil -Byoung, and Bellan, Paul M. 2016. "Vortex motion of dust particles due to non-conservative ion drag force in a plasma". United States. doi:10.1063/1.4941973. https://www.osti.gov/servlets/purl/1469680.
@article{osti_1469680,
title = {Vortex motion of dust particles due to non-conservative ion drag force in a plasma},
author = {Chai, Kil -Byoung and Bellan, Paul M.},
abstractNote = {Vortex motion of the dust in a dusty plasma is shown to result because non-parallelism of the ion density gradient and the gradient of the magnitude of the ion ambipolar velocity cause the ion drag force on dust grains to be non-conservative. Furthermore, dust grain poloidal vortices consistent with the model predictions are experimentally observed, and the vortices change character with imposed changes in the ion temperature profile as predicted. For a certain ion temperature profile, two adjacent co-rotating poloidal vortices have a well-defined X-point analogous to the X-point in magnetic reconnection.},
doi = {10.1063/1.4941973},
journal = {Physics of Plasmas},
number = 2,
volume = 23,
place = {United States},
year = {2016},
month = {2}
}