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Wave chaos and the temperature dependence of LHCD efficiency

Technical Report:

Abstract

Weakly damped lower-hybrid wave propagation is shown to be chaotic for parameter regimes typical of current drive in Tore Supra and JT-60. In these cases, the spectral gap is filled by wave energy that diffuses to higher k{sub II} in the stochastic layer. Agreement between theoretical and experimental scalings for the current drive efficiency is obtained by including non-resonant losses of wave energy, due to collisions and lossy reflections near the plasma edge, which reduce the efficiency at low temperatures, when the spectral gap is large.
Publication Date:
Jun 01, 1992
Product Type:
Technical Report
Report Number:
EUR-CEA-FC-1460
Reference Number:
SCA: 700350; PA: AIX-24:009332; SN: 93000933725
Resource Relation:
Other Information: PBD: Jun 1992
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; LOWER HYBRID CURRENT DRIVE; EFFICIENCY; ELECTRON TEMPERATURE; LANDAU DAMPING; TEMPERATURE DEPENDENCE; WAVE PROPAGATION; 700350; PLASMA PRODUCTION, HEATING, CURRENT DRIVE, AND INTERACTIONS
OSTI ID:
10119906
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: TI93613721; TRN: FR9300237009332
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
FRN
Size:
[17] p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Kupfer, K, and Moreau, D. Wave chaos and the temperature dependence of LHCD efficiency. France: N. p., 1992. Web.
Kupfer, K, & Moreau, D. Wave chaos and the temperature dependence of LHCD efficiency. France.
Kupfer, K, and Moreau, D. 1992. "Wave chaos and the temperature dependence of LHCD efficiency." France.
@misc{etde_10119906,
title = {Wave chaos and the temperature dependence of LHCD efficiency}
author = {Kupfer, K, and Moreau, D}
abstractNote = {Weakly damped lower-hybrid wave propagation is shown to be chaotic for parameter regimes typical of current drive in Tore Supra and JT-60. In these cases, the spectral gap is filled by wave energy that diffuses to higher k{sub II} in the stochastic layer. Agreement between theoretical and experimental scalings for the current drive efficiency is obtained by including non-resonant losses of wave energy, due to collisions and lossy reflections near the plasma edge, which reduce the efficiency at low temperatures, when the spectral gap is large.}
place = {France}
year = {1992}
month = {Jun}
}