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Impurity induced neutralization of MeV energy protons in JET plasmas

Abstract

A model elucidating the role of carbon and beryllium, the main impurities in JET plasmas, in neutralizing MeV energy protons, which arise during ICRF heating of deuterium plasmas in the hydrogen minority heating mode D(H), and from D-D fusion reactions, is presented. The model establishes charge transfer from hydrogen-like impurity ions to protons as the main process for neutralization. Calculations for deducing the proton energy distribution function from measured hydrogen flux are described. The validity of the model is tested by using it to described the measured flux in different conditions of plasma heating and fueling. Further, it is used to deduce the background thermal deuterium atom density at the plasma center. 9 refs., 6 figs.
Authors:
Gondhalekar, A; [1]  Korotkov, A A [2] 
  1. Commission of the European Communities, Abingdon (United Kingdom). JET Joint Undertaking
  2. AF Ioffe Institute, Saint Petersburg (Russian Federation)
Publication Date:
Jul 01, 1994
Product Type:
Conference
Report Number:
JET-P-94-29; CONF-9406270-
Reference Number:
SCA: 700330; PA: AIX-28:032662; EDB-97:058908; SN: 97001766247
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; BEAM NEUTRALIZATION; PLASMA IMPURITIES; PROTON BEAMS; BERYLLIUM; CARBON; D-D REACTORS; HIGH-FREQUENCY HEATING; JET TOKAMAK; NEUTRAL ATOM BEAM INJECTION; PLASMA; PLASMA DIAGNOSTICS; PLASMA SIMULATION
OSTI ID:
456176
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: FR9701753032662
Availability:
INIS; OSTI as DE97621358
Submitting Site:
FRN
Size:
pp. 13-18
Announcement Date:
Apr 21, 1997

Citation Formats

Gondhalekar, A, and Korotkov, A A. Impurity induced neutralization of MeV energy protons in JET plasmas. France: N. p., 1994. Web.
Gondhalekar, A, & Korotkov, A A. Impurity induced neutralization of MeV energy protons in JET plasmas. France.
Gondhalekar, A, and Korotkov, A A. 1994. "Impurity induced neutralization of MeV energy protons in JET plasmas." France.
@misc{etde_456176,
title = {Impurity induced neutralization of MeV energy protons in JET plasmas}
author = {Gondhalekar, A, and Korotkov, A A}
abstractNote = {A model elucidating the role of carbon and beryllium, the main impurities in JET plasmas, in neutralizing MeV energy protons, which arise during ICRF heating of deuterium plasmas in the hydrogen minority heating mode D(H), and from D-D fusion reactions, is presented. The model establishes charge transfer from hydrogen-like impurity ions to protons as the main process for neutralization. Calculations for deducing the proton energy distribution function from measured hydrogen flux are described. The validity of the model is tested by using it to described the measured flux in different conditions of plasma heating and fueling. Further, it is used to deduce the background thermal deuterium atom density at the plasma center. 9 refs., 6 figs.}
place = {France}
year = {1994}
month = {Jul}
}