skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Ion temperature anisotropy limitation in high beta plasmas

Abstract

Measurements of parallel and perpendicular ion temperatures in the Large Experiment on Instabilities and Anisotropies (LEIA) space simulation chamber display an inverse correlation between the upper bound on the ion temperature anisotropy and the parallel ion beta ({beta}=8{pi}nkT/B{sup 2}). Fluctuation measurements indicate the presence of low frequency, transverse, electromagnetic waves with wave numbers and frequencies that are consistent with predictions for Alfven Ion Cyclotron instabilities. These observations are also consistent with in situ spacecraft measurements in the Earth's magnetosheath and with a theoretical/computational model that predicts that such an upper bound on the ion temperature anisotropy is imposed by scattering from enhanced fluctuations due to growth of the Alfven ion cyclotron instability. (c) 2000 American Institute of Physics.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [2]
  1. West Virginia University, Morgantown, West Virginia 26506 (United States)
  2. Los Alamos National Laboratory, Los Alamos, New Mexico 87544 (United States)
Publication Date:
OSTI Identifier:
20216079
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 7; Journal Issue: 5; Other Information: PBD: May 2000; Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; HIGH-BETA PLASMA; ANISOTROPY; ION TEMPERATURE; PLASMA DENSITY; PLASMA WAVES; PLASMA INSTABILITY; FLUCTUATIONS; EXPERIMENTAL DATA

Citation Formats

Scime, Earl E., Keiter, Paul A., Balkey, Matthew M., Boivin, Robert F., Kline, John L., Blackburn, Melanie, and Gary, S. Peter. Ion temperature anisotropy limitation in high beta plasmas. United States: N. p., 2000. Web. doi:10.1063/1.874036.
Scime, Earl E., Keiter, Paul A., Balkey, Matthew M., Boivin, Robert F., Kline, John L., Blackburn, Melanie, & Gary, S. Peter. Ion temperature anisotropy limitation in high beta plasmas. United States. doi:10.1063/1.874036.
Scime, Earl E., Keiter, Paul A., Balkey, Matthew M., Boivin, Robert F., Kline, John L., Blackburn, Melanie, and Gary, S. Peter. Mon . "Ion temperature anisotropy limitation in high beta plasmas". United States. doi:10.1063/1.874036.
@article{osti_20216079,
title = {Ion temperature anisotropy limitation in high beta plasmas},
author = {Scime, Earl E. and Keiter, Paul A. and Balkey, Matthew M. and Boivin, Robert F. and Kline, John L. and Blackburn, Melanie and Gary, S. Peter},
abstractNote = {Measurements of parallel and perpendicular ion temperatures in the Large Experiment on Instabilities and Anisotropies (LEIA) space simulation chamber display an inverse correlation between the upper bound on the ion temperature anisotropy and the parallel ion beta ({beta}=8{pi}nkT/B{sup 2}). Fluctuation measurements indicate the presence of low frequency, transverse, electromagnetic waves with wave numbers and frequencies that are consistent with predictions for Alfven Ion Cyclotron instabilities. These observations are also consistent with in situ spacecraft measurements in the Earth's magnetosheath and with a theoretical/computational model that predicts that such an upper bound on the ion temperature anisotropy is imposed by scattering from enhanced fluctuations due to growth of the Alfven ion cyclotron instability. (c) 2000 American Institute of Physics.},
doi = {10.1063/1.874036},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 5,
volume = 7,
place = {United States},
year = {2000},
month = {5}
}