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Impurity line emission due to thermal charge exchange in JET edge plasmas

Abstract

High n-shell emission from hydrogen-like carbon (C VI, n=8-7) has been routinely observed from the plasma edge of JET. By comparing the measured spectral line intensities with the signals predicted by advanced atomic physics modelling of carbon and hydrogen radiation, integrated with modelling of the divertor and edge plasma, it is concluded that charge transfer from excited state hydrogen donors into fully stripped carbon ions can account for the observed spectral emission, but that the hydrogen distribution and to a lesser extent the carbon distribution away from the strike zone predicted by the transport model are too low. Data presented are those of three upper X-point discharges, where the target material was carbon. 5 refs., 1 fig., 3 tabs.
Authors:
Maggi, C F; Horton, L D; Koenig, R; Stamp, M; [1]  Summers, H P [2] 
  1. Commission of the European Communities, Abingdon (United Kingdom). JET Joint Undertaking
  2. Strathclyde Univ., Glasgow (United Kingdom)
Publication Date:
Jul 01, 1994
Product Type:
Conference
Report Number:
JET-P-94-29; CONF-9406270-
Reference Number:
SCA: 700330; PA: AIX-28:032671; EDB-97:058907; SN: 97001766256
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; CHARGE EXCHANGE; PLASMA IMPURITIES; EMISSION SPECTRA; BOUNDARY LAYERS; DIVERTORS; JET TOKAMAK; NEUTRON EMISSION; PLASMA DIAGNOSTICS; PLASMA RADIAL PROFILES; PLASMA SIMULATION
OSTI ID:
456185
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: FR9701782032671
Availability:
INIS; OSTI as DE97621358
Submitting Site:
FRN
Size:
pp. 187-192
Announcement Date:

Citation Formats

Maggi, C F, Horton, L D, Koenig, R, Stamp, M, and Summers, H P. Impurity line emission due to thermal charge exchange in JET edge plasmas. France: N. p., 1994. Web.
Maggi, C F, Horton, L D, Koenig, R, Stamp, M, & Summers, H P. Impurity line emission due to thermal charge exchange in JET edge plasmas. France.
Maggi, C F, Horton, L D, Koenig, R, Stamp, M, and Summers, H P. 1994. "Impurity line emission due to thermal charge exchange in JET edge plasmas." France.
@misc{etde_456185,
title = {Impurity line emission due to thermal charge exchange in JET edge plasmas}
author = {Maggi, C F, Horton, L D, Koenig, R, Stamp, M, and Summers, H P}
abstractNote = {High n-shell emission from hydrogen-like carbon (C VI, n=8-7) has been routinely observed from the plasma edge of JET. By comparing the measured spectral line intensities with the signals predicted by advanced atomic physics modelling of carbon and hydrogen radiation, integrated with modelling of the divertor and edge plasma, it is concluded that charge transfer from excited state hydrogen donors into fully stripped carbon ions can account for the observed spectral emission, but that the hydrogen distribution and to a lesser extent the carbon distribution away from the strike zone predicted by the transport model are too low. Data presented are those of three upper X-point discharges, where the target material was carbon. 5 refs., 1 fig., 3 tabs.}
place = {France}
year = {1994}
month = {Jul}
}