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Author Supra, Equipe Tore
Sponsorship USDOE
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword 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
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.}
ISSN 0094243X
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-02-01
Publisher Department Association Euratom-CEA, Centre d`Etudes Nucleaires de Cadarache, 13 - Saint-Paul-lez-Durance (France)
Publisher Place United States
Volume Number 355
Issue Number 1
Technical Publication No. CONF-9505105-
Organization Association Euratom-CEA, Centre d`Etudes Nucleaires de Cadarache, 13 - Saint-Paul-lez-Durance (France)


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