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Title: Magnetic-divertor stabilization of an axisymmetric plasma with anisotropic temperature

Abstract

Magnetohydrodynamic stabilization of an axisymmetric mirror plasma with a magnetic divertor is studied. An equation is found for the flute modes, which includes the stabilizing influence of ion temperature anisotropy and nonparaxial magnetic fields, as well as a finite ion Larmor radius. It is shown that if the density profile is sufficiently gentle, then the nonparaxial configuration can stabilize all modes as long as ion temperature is radially uniform. This can be demonstrated even when the density vanishes on the separatrix and even for small ion Larmor radii. It is found, however, that the ion temperature gradient makes the unstable region wider; high ion temperature is required to stabilize the flute mode.

Authors:
; ; ; ;  [1];  [2]
  1. Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577 (Japan)
  2. (Russian Federation)
Publication Date:
OSTI Identifier:
20860440
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 13; Journal Issue: 12; Other Information: DOI: 10.1063/1.2402912; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ANISOTROPY; AXIAL SYMMETRY; DIVERTORS; ELECTRON TEMPERATURE; FLUTE INSTABILITY; ION TEMPERATURE; LARMOR RADIUS; MAGNETIC FIELDS; MAGNETIC MIRRORS; MAGNETOHYDRODYNAMICS; PLASMA; PLASMA DENSITY; RADIATION TRANSPORT; STABILIZATION; TEMPERATURE GRADIENTS

Citation Formats

Sasagawa, Y., Katanuma, I., Mizoguchi, Y., Cho, T., Pastukhov, V. P., and RRC 'Kurchatov Institute', Kurchatov Square, 1, 123182 Moscow. Magnetic-divertor stabilization of an axisymmetric plasma with anisotropic temperature. United States: N. p., 2006. Web. doi:10.1063/1.2402912.
Sasagawa, Y., Katanuma, I., Mizoguchi, Y., Cho, T., Pastukhov, V. P., & RRC 'Kurchatov Institute', Kurchatov Square, 1, 123182 Moscow. Magnetic-divertor stabilization of an axisymmetric plasma with anisotropic temperature. United States. doi:10.1063/1.2402912.
Sasagawa, Y., Katanuma, I., Mizoguchi, Y., Cho, T., Pastukhov, V. P., and RRC 'Kurchatov Institute', Kurchatov Square, 1, 123182 Moscow. Fri . "Magnetic-divertor stabilization of an axisymmetric plasma with anisotropic temperature". United States. doi:10.1063/1.2402912.
@article{osti_20860440,
title = {Magnetic-divertor stabilization of an axisymmetric plasma with anisotropic temperature},
author = {Sasagawa, Y. and Katanuma, I. and Mizoguchi, Y. and Cho, T. and Pastukhov, V. P. and RRC 'Kurchatov Institute', Kurchatov Square, 1, 123182 Moscow},
abstractNote = {Magnetohydrodynamic stabilization of an axisymmetric mirror plasma with a magnetic divertor is studied. An equation is found for the flute modes, which includes the stabilizing influence of ion temperature anisotropy and nonparaxial magnetic fields, as well as a finite ion Larmor radius. It is shown that if the density profile is sufficiently gentle, then the nonparaxial configuration can stabilize all modes as long as ion temperature is radially uniform. This can be demonstrated even when the density vanishes on the separatrix and even for small ion Larmor radii. It is found, however, that the ion temperature gradient makes the unstable region wider; high ion temperature is required to stabilize the flute mode.},
doi = {10.1063/1.2402912},
journal = {Physics of Plasmas},
number = 12,
volume = 13,
place = {United States},
year = {Fri Dec 15 00:00:00 EST 2006},
month = {Fri Dec 15 00:00:00 EST 2006}
}