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Correlations between locked modes and impurity influxes

Abstract

An analysis of pulses that were disturbed by medium Z impurity influxes (Cl, Cr, Fe and Ni) recorded during the 91/92 JET operations, has demonstrated that such influxes can result in MHD modes which subsequently ``lock``. A correlation is found between the power radiated by the influx and the time difference between the start of the influx and the beginning of the locked mode. The growth in the amplitude of the locked mode itself can lead to further impurity influxes. A correlation is noted between intense influxes (superior to 10 MW) and the mode ``unlocking``. (authors). 4 refs., 4 figs.
Authors:
Fishpool, G M; [1]  Lawson, K D [2] 
  1. Commission of the European Communities, Abingdon (United Kingdom). JET Joint Undertaking
  2. UKAEA Culham Lab., Abingdon (United Kingdom)
Publication Date:
Jul 01, 1994
Product Type:
Conference
Report Number:
JET-P-94-29; CONF-9406270-
Reference Number:
SCA: 700330; 700340; 700310; PA: AIX-28:032674; EDB-97:058917; SN: 97001766259
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 DISRUPTION; PLASMA IMPURITIES; MODE LOCKING; CORRELATIONS; JET TOKAMAK; PLASMA DIAGNOSTICS; RADIATION FLUX; ROTATING PLASMA
OSTI ID:
456188
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: FR9701787032674
Availability:
INIS; OSTI as DE97621358
Submitting Site:
FRN
Size:
pp. 217-222
Announcement Date:
Apr 21, 1997

Citation Formats

Fishpool, G M, and Lawson, K D. Correlations between locked modes and impurity influxes. France: N. p., 1994. Web.
Fishpool, G M, & Lawson, K D. Correlations between locked modes and impurity influxes. France.
Fishpool, G M, and Lawson, K D. 1994. "Correlations between locked modes and impurity influxes." France.
@misc{etde_456188,
title = {Correlations between locked modes and impurity influxes}
author = {Fishpool, G M, and Lawson, K D}
abstractNote = {An analysis of pulses that were disturbed by medium Z impurity influxes (Cl, Cr, Fe and Ni) recorded during the 91/92 JET operations, has demonstrated that such influxes can result in MHD modes which subsequently ``lock``. A correlation is found between the power radiated by the influx and the time difference between the start of the influx and the beginning of the locked mode. The growth in the amplitude of the locked mode itself can lead to further impurity influxes. A correlation is noted between intense influxes (superior to 10 MW) and the mode ``unlocking``. (authors). 4 refs., 4 figs.}
place = {France}
year = {1994}
month = {Jul}
}