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Title: RF Heating and current drive in Tore Supra

Abstract

Recent RF heating and current drive experiments in the Lower Hybrid (LH) and Ion Cyclotron (IC) frequency ranges are reported. In the 4T improved confinement LHEP regime, steady-state LHCD operation has been realized with a new {open_quote}{open_quote}constant-flux{close_quote}{close_quote} scenario. A new, reversed shear, 2T improved confinement plasma regime has also been investigated when the core plasma is inaccessible to the LH waves. Stable, LH driven 0.4 MA discharges were obtained with {ital H}{sub rlw}=2 at {beta}{sub p}=0.8, {ital q}{sub 0} above 2 and with a reduced electron thermal diffusivity in the central reversed shear region. Efficient direct coupling of the fast magnetosonic wave to the electrons for heating and current drive is observed during 48 MHz/2T operation. Fast wave electron heating has produced improved confinement with {ital H}{sub r1w}=2 at {beta}{sub p}=1.6, and a bootstrap current fraction up to 45{percent}. Fast wave current drive has been observed at the level of 80 kA in a 0.4 MA discharge. {copyright} {ital 1996 American Institute of Physics.}

Authors:
 [1]
  1. presented by X. Litaudon
Publication Date:
Research Org.:
Association Euratom-CEA, Centre d`Etudes Nucleaires de Cadarache, 13 - Saint-Paul-lez-Durance (France)
Sponsoring Org.:
USDOE
OSTI Identifier:
289005
Report Number(s):
CONF-9505105-
Journal ID: APCPCS; ISSN 0094-243X; TRN: 96:021714
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 355; Journal Issue: 1; Conference: 11. topical conference on radio frequency in plasmas, Palm Springs, CA (United States), 17-19 May 1995; Other Information: PBD: Feb 1996
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION; LOWER HYBRID CURRENT DRIVE; PLASMA CONFINEMENT; ICR HEATING; TOROIDAL CONFIGURATION; RF SYSTEMS; MHZ RANGE 01-100; GHZ RANGE 01-100; NON-INDUCTIVE CURRENT DRIVE; STEADY-STATE CONDITIONS; CURRENT DENSITY; DIFFUSION

Citation Formats

Supra, Equipe Tore. RF Heating and current drive in Tore Supra. United States: N. p., 1996. Web. doi:10.1063/1.49523.
Supra, Equipe Tore. RF Heating and current drive in Tore Supra. United States. https://doi.org/10.1063/1.49523
Supra, Equipe Tore. 1996. "RF Heating and current drive in Tore Supra". United States. https://doi.org/10.1063/1.49523.
@article{osti_289005,
title = {RF Heating and current drive in Tore Supra},
author = {Supra, Equipe Tore},
abstractNote = {Recent RF heating and current drive experiments in the Lower Hybrid (LH) and Ion Cyclotron (IC) frequency ranges are reported. In the 4T improved confinement LHEP regime, steady-state LHCD operation has been realized with a new {open_quote}{open_quote}constant-flux{close_quote}{close_quote} scenario. A new, reversed shear, 2T improved confinement plasma regime has also been investigated when the core plasma is inaccessible to the LH waves. Stable, LH driven 0.4 MA discharges were obtained with {ital H}{sub rlw}=2 at {beta}{sub p}=0.8, {ital q}{sub 0} above 2 and with a reduced electron thermal diffusivity in the central reversed shear region. Efficient direct coupling of the fast magnetosonic wave to the electrons for heating and current drive is observed during 48 MHz/2T operation. Fast wave electron heating has produced improved confinement with {ital H}{sub r1w}=2 at {beta}{sub p}=1.6, and a bootstrap current fraction up to 45{percent}. Fast wave current drive has been observed at the level of 80 kA in a 0.4 MA discharge. {copyright} {ital 1996 American Institute of Physics.}},
doi = {10.1063/1.49523},
url = {https://www.osti.gov/biblio/289005}, journal = {AIP Conference Proceedings},
number = 1,
volume = 355,
place = {United States},
year = {Thu Feb 01 00:00:00 EST 1996},
month = {Thu Feb 01 00:00:00 EST 1996}
}