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Title: Creation of large temperature anisotropies in a laboratory plasma

Abstract

Ion temperature anisotropy in an expanding magnetized plasma is investigated using laser induced fluorescence. Parallel and perpendicular ion velocity distribution functions (IVDFs) were measured simultaneously with high spatial resolution in the expanding plasma. Large ion temperature anisotropies (T⊥i/T∥i ~ 10) are observed in a conical region at the periphery of the expanding plasma plume. A simple 2D Boris stepper model that incorporates the measured electric field structure is able to reproduce the gross features of the measured perpendicular IVDFs. Here, a Nyquist stability analysis of the measured IVDFs suggests that multiple instabilities with k⊥ρi ~ 1 and k||ρi ~ 0.2 are likely to be excited in these plasmas.

Authors:
 [1]; ORCiD logo [1]; ORCiD logo [2];  [1]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [1]; ORCiD logo [1]
  1. West Virginia Univ., Morgantown, WV (United States)
  2. Auburn Univ., AL (United States)
  3. Univ. of Arizona, Tucson, AZ (United States)
  4. West Virginia Univ., Morgantown, WV (United States); Univ. of Iowa, Iowa City, IA (United States)
Publication Date:
Research Org.:
West Virginia Univ., Morgantown, WV (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES); National Science Foundation (NSF); National Aeronautics and Space Administration (NASA)
OSTI Identifier:
1755895
Grant/Contract Number:  
SC0020294; PHY-1902111; 80NSSC19K0912
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 27; Journal Issue: 12; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Laser induced fluorescence; Plasma sources; Plasma properties and parameters; Plasma waves; Plasma sheaths; Plasma instabilities; Plasma heating; Solar wind; Data visualization

Citation Formats

Beatty, C. B., Steinberger, T. E., Aguirre, E. M., Beatty, R. A., Klein, K. G., McLaughlin, J. W., Neal, L., and Scime, E. E.. Creation of large temperature anisotropies in a laboratory plasma. United States: N. p., 2020. Web. https://doi.org/10.1063/5.0029315.
Beatty, C. B., Steinberger, T. E., Aguirre, E. M., Beatty, R. A., Klein, K. G., McLaughlin, J. W., Neal, L., & Scime, E. E.. Creation of large temperature anisotropies in a laboratory plasma. United States. https://doi.org/10.1063/5.0029315
Beatty, C. B., Steinberger, T. E., Aguirre, E. M., Beatty, R. A., Klein, K. G., McLaughlin, J. W., Neal, L., and Scime, E. E.. Tue . "Creation of large temperature anisotropies in a laboratory plasma". United States. https://doi.org/10.1063/5.0029315. https://www.osti.gov/servlets/purl/1755895.
@article{osti_1755895,
title = {Creation of large temperature anisotropies in a laboratory plasma},
author = {Beatty, C. B. and Steinberger, T. E. and Aguirre, E. M. and Beatty, R. A. and Klein, K. G. and McLaughlin, J. W. and Neal, L. and Scime, E. E.},
abstractNote = {Ion temperature anisotropy in an expanding magnetized plasma is investigated using laser induced fluorescence. Parallel and perpendicular ion velocity distribution functions (IVDFs) were measured simultaneously with high spatial resolution in the expanding plasma. Large ion temperature anisotropies (T⊥i/T∥i ~ 10) are observed in a conical region at the periphery of the expanding plasma plume. A simple 2D Boris stepper model that incorporates the measured electric field structure is able to reproduce the gross features of the measured perpendicular IVDFs. Here, a Nyquist stability analysis of the measured IVDFs suggests that multiple instabilities with k⊥ρi ~ 1 and k||ρi ~ 0.2 are likely to be excited in these plasmas.},
doi = {10.1063/5.0029315},
journal = {Physics of Plasmas},
number = 12,
volume = 27,
place = {United States},
year = {2020},
month = {12}
}

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