Avoidance of q sub a =3 disruption by electron cyclotron heating in the JFT-2M tokamak

Journal Article · Mon Oct 12 04:00:00 EDT 1992 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.69.2208· OSTI ID:6970887

Hoshino, K; Mori, M; Yamamoto, T; Tamai, H; Shoji, T; Miura, Y; Aikawa, H; Kasai, S; Kawakami, T; Kawashima, H; Maeno, M; Matsuda, T; Oasa, K; Odajima, K; Ogawa, H; Ogawa, T; Seike, T; Shiina, T; Uehara, K; Yamauchi, T ; Suzuki, N; Maeda, H ^[1]

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1. Experimental Plasma Physics Laboratory, Department of Fusion Plasma Research, Japan Atomic Energy Research Institute, Tokai, Naka, Ibaraki 319-11 (Japan)

The typical MHD disruption at safety factor {ital q}{sub {ital a}}=3 has been suppressed by off-central electron cyclotron heating with power of 70--80 kW in the JFT-2M tokamak. For the suppression, the electron cyclotron resonance layer has to be placed radially in a very narrow region of width about 1 cm near the {ital q}=2 surface. The observed narrow suppression window suggests that the basic mechanism responsible for the suppression is direct island heating. The actual time scale of the suppression is much faster than the time scale of the change of the overall current profile.

• OSTI ID: 6970887
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 69:15; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700340 -- Plasma Waves
Oscillations
& Instabilities-- (1992-)
700350* -- Plasma Production
Heating
Current Drive
& Interactions-- (1992-)
CLOSED PLASMA DEVICES
DATA
ECR HEATING
ELEMENTS
EXPERIMENTAL DATA
FLUID MECHANICS
HEATING
HIGH-FREQUENCY HEATING
HYDRODYNAMICS
HYDROGEN
INFORMATION
INHIBITION
INSTABILITY
JFT-2M TOKAMAK
MAGNETOHYDRODYNAMICS
MECHANICS
NONMETALS
NUMERICAL DATA
PLASMA DISRUPTION
PLASMA HEATING
PLASMA INSTABILITY
POWER
THERMONUCLEAR DEVICES
TOKAMAK DEVICES