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The SOL width and the MHD interchange instability in tokamaks

Abstract

Instabilities in the SOL plasma can strongly influence the SOL plasma behaviour and in particular the SOL width. The SOL stability analysis shows that there exists a critical ratio of the thermal energy and the magnetic energy. If the SOL beta is greater than this critical value, the magnetic field cannot prevent the plasma displacement and a strong MHD instability in the SOL occurs. In the opposite case only slower resistive instabilities can develop. A theoretical investigation of the SOL plasma stability is presented for JET single-null and double-null divertor configurations. The dependence of the stability threshold on the SOL beta and on the sheath resistance is established. Applying a simple mixing length argument gives the scaling of the SOL width. 5 refs., 2 figs.
Authors:
Kerner, W; [1]  Pogutse, O [2] 
  1. Commission of the European Communities, Abingdon (United Kingdom). JET Joint Undertaking
  2. Kurchatov institute, Moscow (Russian Federation)
Publication Date:
Jul 01, 1994
Product Type:
Conference
Report Number:
JET-P-94-29; CONF-9406270-
Reference Number:
SCA: 700330; 700340; PA: AIX-28:032666; EDB-97:058912; SN: 97001766251
Resource Relation:
Conference: 21. EPS conference on controlled fusion and plasma physics, Montpellier (France), 27 Jun - 1 Jul 1994; Other Information: PBD: Jul 1994; Related Information: Is Part Of Controlled fusion and plasma physics; PB: 240 p.
Subject:
70 PLASMA PHYSICS AND FUSION; PLASMA MACROINSTABILITIES; PLASMA SCRAPE-OFF LAYER; PLASMA SIMULATION; BETA RATIO; DIVERTORS; JET TOKAMAK; MAGNETIC FIELD CONFIGURATIONS; MHD EQUILIBRIUM; PLASMA IMPURITIES; PLASMA SHEATH
OSTI ID:
456180
Research Organizations:
Commission of the European Communities, Abingdon (United Kingdom). JET Joint Undertaking
Country of Origin:
France
Language:
English
Other Identifying Numbers:
Other: ON: DE97621358; TRN: FR9701767032666
Availability:
INIS; OSTI as DE97621358
Submitting Site:
FRN
Size:
pp. 97-102
Announcement Date:
Apr 21, 1997

Citation Formats

Kerner, W, and Pogutse, O. The SOL width and the MHD interchange instability in tokamaks. France: N. p., 1994. Web.
Kerner, W, & Pogutse, O. The SOL width and the MHD interchange instability in tokamaks. France.
Kerner, W, and Pogutse, O. 1994. "The SOL width and the MHD interchange instability in tokamaks." France.
@misc{etde_456180,
title = {The SOL width and the MHD interchange instability in tokamaks}
author = {Kerner, W, and Pogutse, O}
abstractNote = {Instabilities in the SOL plasma can strongly influence the SOL plasma behaviour and in particular the SOL width. The SOL stability analysis shows that there exists a critical ratio of the thermal energy and the magnetic energy. If the SOL beta is greater than this critical value, the magnetic field cannot prevent the plasma displacement and a strong MHD instability in the SOL occurs. In the opposite case only slower resistive instabilities can develop. A theoretical investigation of the SOL plasma stability is presented for JET single-null and double-null divertor configurations. The dependence of the stability threshold on the SOL beta and on the sheath resistance is established. Applying a simple mixing length argument gives the scaling of the SOL width. 5 refs., 2 figs.}
place = {France}
year = {1994}
month = {Jul}
}