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Stability of high-beta tokamak equilibria and transport in Belt-Pinch IIa

Journal Article:

Abstract

In Belt-Pinch IIa, highly elongated equilibria with poloidal beta values up to the aspect ratio have been achieved. In these tokamak-like configurations, no fast-growing MHD instabilities such as external kink and ballooning modes have been observed. Rigid displacement instabilities have been stabilized by an appropriate poloidal magnetic field configuration and by a conducting shell. By comparing simulation experiments using the Garching high-beta transport code with measurements, it has been found that in the collision-dominated plasma no anomalously enhanced transport occurs. Transport theory in the Pfirsch-Schlueter regime, which includes elongation and high-beta effects, has been confirmed by the experiment. In particular, it has been shown that the perpendicular electrical conductivity is also classical. Detailed investigations of oxygen and carbon impurity losses demonstrated that the impurity subprograms commonly used for tokamaks underestimate the radiation losses in the range Tsub(e)=10 to 30 eV.
Authors:
Becker, G; Gruber, O; Krause, H; Mast, F; Wilhelm, R [1] 
  1. Association Euratom-Max-Planck-Institut fuer Plasmaphysik, Garching (Germany, F.R.)
Publication Date:
Jan 01, 1978
Product Type:
Journal Article
Reference Number:
AIX-10-422330; EDB-79-102914
Resource Relation:
Journal Name: Nucl. Fusion; (International Atomic Energy Agency (IAEA)); Journal Volume: 18:12
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; BELT PINCH; EQUILIBRIUM PLASMA; TRANSPORT THEORY; ASPECT RATIO; BETA RATIO; COLLISIONAL PLASMA; ELECTRON DENSITY; ELECTRON TEMPERATURE; ENERGY TRANSFER; HIGH-BETA PLASMA; ION DENSITY; ION TEMPERATURE; MAGNETIC FIELDS; PLASMA DENSITY; SPATIAL DISTRIBUTION; TWO-DIMENSIONAL CALCULATIONS; DISTRIBUTION; LONGITUDINAL PINCH; PINCH EFFECT; PLASMA; 700105* - Fusion Energy- Plasma Research- Plasma Kinetics-Theoretical- (-1987)
OSTI ID:
6178003
Country of Origin:
IAEA
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: NUFUA
Submitting Site:
INIS
Size:
Pages: 1653-1662
Announcement Date:
Mar 01, 1979

Journal Article:

Citation Formats

Becker, G, Gruber, O, Krause, H, Mast, F, and Wilhelm, R. Stability of high-beta tokamak equilibria and transport in Belt-Pinch IIa. IAEA: N. p., 1978. Web.
Becker, G, Gruber, O, Krause, H, Mast, F, & Wilhelm, R. Stability of high-beta tokamak equilibria and transport in Belt-Pinch IIa. IAEA.
Becker, G, Gruber, O, Krause, H, Mast, F, and Wilhelm, R. 1978. "Stability of high-beta tokamak equilibria and transport in Belt-Pinch IIa." IAEA.
@misc{etde_6178003,
title = {Stability of high-beta tokamak equilibria and transport in Belt-Pinch IIa}
author = {Becker, G, Gruber, O, Krause, H, Mast, F, and Wilhelm, R}
abstractNote = {In Belt-Pinch IIa, highly elongated equilibria with poloidal beta values up to the aspect ratio have been achieved. In these tokamak-like configurations, no fast-growing MHD instabilities such as external kink and ballooning modes have been observed. Rigid displacement instabilities have been stabilized by an appropriate poloidal magnetic field configuration and by a conducting shell. By comparing simulation experiments using the Garching high-beta transport code with measurements, it has been found that in the collision-dominated plasma no anomalously enhanced transport occurs. Transport theory in the Pfirsch-Schlueter regime, which includes elongation and high-beta effects, has been confirmed by the experiment. In particular, it has been shown that the perpendicular electrical conductivity is also classical. Detailed investigations of oxygen and carbon impurity losses demonstrated that the impurity subprograms commonly used for tokamaks underestimate the radiation losses in the range Tsub(e)=10 to 30 eV.}
journal = {Nucl. Fusion; (International Atomic Energy Agency (IAEA))}
volume = {18:12}
journal type = {AC}
place = {IAEA}
year = {1978}
month = {Jan}
}