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Title: Effects of internal structure on equilibrium of field-reversed configuration plasma sustained by rotating magnetic field

Abstract

The effects of an internal structure on the equilibrium of a field-reversed configuration (FRC) plasma sustained by rotating magnetic field is investigated by using detailed electrostatic probe measurements in the FRC Injection Experiment apparatus [S. Okada, et al., Nucl. Fusion. 45, 1094 (2005)]. An internal structure installed axially on the geometrical axis, which simulates Ohmic transformer or external toroidal field coils on the FRC device, brings about substantial changes in plasma density profile. The internal structure generates steep density-gradients not only on the inner side but on the outer side of the torus. The radial electric field is observed to sustain the ion thermal pressure-gradient in the FRC without the internal structure; however, the radial electric field is not sufficient to sustain the increased ion thermal pressure-gradient in the FRC with the internal structure. Spontaneously driven azimuthal ion flow will be accountable for the imbalance of the radial pressure which is modified by the internal structure.

Authors:
; ;  [1]; ;  [2]
  1. Center for Atomic and Molecular Technologies, Graduate School of Engineering, Osaka University, Osaka 565-0871 (Japan)
  2. College of Science and Technology, Nihon University, Tokyo 101-8308 (Japan)
Publication Date:
OSTI Identifier:
21269055
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 15; Journal Issue: 9; Other Information: DOI: 10.1063/1.2982493; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ELECTRIC FIELDS; ELECTROSTATIC PROBES; EQUILIBRIUM; FIELD-REVERSED THETA PINCH DEVICES; PLASMA DENSITY; PLASMA PRESSURE; PRESSURE GRADIENTS

Citation Formats

Yambe, Kiyoyuki, Inomoto, Michiaki, Okada, Shigefumi, Kobayashi, Yuka, and Asai, Tomohiko. Effects of internal structure on equilibrium of field-reversed configuration plasma sustained by rotating magnetic field. United States: N. p., 2008. Web. doi:10.1063/1.2982493.
Yambe, Kiyoyuki, Inomoto, Michiaki, Okada, Shigefumi, Kobayashi, Yuka, & Asai, Tomohiko. Effects of internal structure on equilibrium of field-reversed configuration plasma sustained by rotating magnetic field. United States. doi:10.1063/1.2982493.
Yambe, Kiyoyuki, Inomoto, Michiaki, Okada, Shigefumi, Kobayashi, Yuka, and Asai, Tomohiko. Mon . "Effects of internal structure on equilibrium of field-reversed configuration plasma sustained by rotating magnetic field". United States. doi:10.1063/1.2982493.
@article{osti_21269055,
title = {Effects of internal structure on equilibrium of field-reversed configuration plasma sustained by rotating magnetic field},
author = {Yambe, Kiyoyuki and Inomoto, Michiaki and Okada, Shigefumi and Kobayashi, Yuka and Asai, Tomohiko},
abstractNote = {The effects of an internal structure on the equilibrium of a field-reversed configuration (FRC) plasma sustained by rotating magnetic field is investigated by using detailed electrostatic probe measurements in the FRC Injection Experiment apparatus [S. Okada, et al., Nucl. Fusion. 45, 1094 (2005)]. An internal structure installed axially on the geometrical axis, which simulates Ohmic transformer or external toroidal field coils on the FRC device, brings about substantial changes in plasma density profile. The internal structure generates steep density-gradients not only on the inner side but on the outer side of the torus. The radial electric field is observed to sustain the ion thermal pressure-gradient in the FRC without the internal structure; however, the radial electric field is not sufficient to sustain the increased ion thermal pressure-gradient in the FRC with the internal structure. Spontaneously driven azimuthal ion flow will be accountable for the imbalance of the radial pressure which is modified by the internal structure.},
doi = {10.1063/1.2982493},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 9,
volume = 15,
place = {United States},
year = {2008},
month = {9}
}