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Plasma effects on the particle collection characteristics of the TORE SUPRA modular pump limiter

Technical Report:

Abstract

The particle collection characteristics of the Tore Supra outboard pump limiter (OPL) are studied in order to assess and understand the effects of the plasma parameters on the performance of the OPL module. The results of two series of experiments, one in plasmas with ohmic heating and one in plasmas with lower hybrid heating, are analyzed, and the general trend of the module particle collection is evaluated by studying the OPL conductance parameter (total hydrogenic ion particle influx/resulting pressure buildup in the module) in plasmas with various densities, temperatures, heating power, and impurity behavior. For this study, the contribution from the impurity carbon influx to the OPL is taken into account in estimating the hydrogenic ion particle influx obtained from the Langmuir probes that are located inside the OPL entrance throat. The results presented here indicate that molecular gas conductance, not plasma plugging due to ionization of the backflow neutrals, plays the principal role in the particle collection performance of the OPL for local densities up to 4 x 10{sup 12} cm{sup -3}. This observation is consistent with the fact that the ionization mean free path of the outstreaming neutrals is comparable to the throat length of the module for  More>>
Authors:
Loarer, T; Chatelier, M; [1]  Uckan, T; Mioduszewski, P K [2] 
  1. Association Euratom-CEA, Centre d`Etudes de Cadarache, 13 - Saint-Paul-lez-Durance (France). Dept. de Recherches sur la Fusion Controlee
  2. Oak Ridge National Lab., TN (United States)
Publication Date:
May 01, 1992
Product Type:
Technical Report
Report Number:
EUR-CEA-FC-1465
Reference Number:
SCA: 700350; PA: AIX-24:009333; SN: 93000933726
Resource Relation:
Other Information: PBD: May 1992
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; PUMPED LIMITERS; PERFORMANCE; TORE SUPRA TOKAMAK; ELECTRON DENSITY; ELECTRON TEMPERATURE; JOULE HEATING; LOWER HYBRID HEATING; PLASMA DENSITY; PLASMA IMPURITIES; 700350; PLASMA PRODUCTION, HEATING, CURRENT DRIVE, AND INTERACTIONS
OSTI ID:
10119912
Research Organizations:
Association Euratom-CEA, Centre d`Etudes de Cadarache, 13 - Saint-Paul-lez-Durance (France). Dept. de Recherches sur la Fusion Controlee
Country of Origin:
France
Language:
English
Other Identifying Numbers:
Other: ON: TI93613722; CNN: Contract DE-AC05-84OR21400; TRN: FR9300239009333
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
FRN
Size:
[24] p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Loarer, T, Chatelier, M, Uckan, T, and Mioduszewski, P K. Plasma effects on the particle collection characteristics of the TORE SUPRA modular pump limiter. France: N. p., 1992. Web.
Loarer, T, Chatelier, M, Uckan, T, & Mioduszewski, P K. Plasma effects on the particle collection characteristics of the TORE SUPRA modular pump limiter. France.
Loarer, T, Chatelier, M, Uckan, T, and Mioduszewski, P K. 1992. "Plasma effects on the particle collection characteristics of the TORE SUPRA modular pump limiter." France.
@misc{etde_10119912,
title = {Plasma effects on the particle collection characteristics of the TORE SUPRA modular pump limiter}
author = {Loarer, T, Chatelier, M, Uckan, T, and Mioduszewski, P K}
abstractNote = {The particle collection characteristics of the Tore Supra outboard pump limiter (OPL) are studied in order to assess and understand the effects of the plasma parameters on the performance of the OPL module. The results of two series of experiments, one in plasmas with ohmic heating and one in plasmas with lower hybrid heating, are analyzed, and the general trend of the module particle collection is evaluated by studying the OPL conductance parameter (total hydrogenic ion particle influx/resulting pressure buildup in the module) in plasmas with various densities, temperatures, heating power, and impurity behavior. For this study, the contribution from the impurity carbon influx to the OPL is taken into account in estimating the hydrogenic ion particle influx obtained from the Langmuir probes that are located inside the OPL entrance throat. The results presented here indicate that molecular gas conductance, not plasma plugging due to ionization of the backflow neutrals, plays the principal role in the particle collection performance of the OPL for local densities up to 4 x 10{sup 12} cm{sup -3}. This observation is consistent with the fact that the ionization mean free path of the outstreaming neutrals is comparable to the throat length of the module for the density and the electron temperature available in the throat.}
place = {France}
year = {1992}
month = {May}
}