Electron Cyclotron / Bernstein Wave Heating and Current Drive Experiments using Phased-array Antenna in QUEST

Journal Article · Fri Dec 23 00:00:00 EST 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3665017· OSTI ID:21612521

Idei, H; Zushi, H; Hanada, K; Nakamura, K; Fujisawa, A; Hasegawa, M; Yoshida, N; Watanebe, H; Tokunaga, K; Nagashima, Y; Kawasaki, S; Nakashima, H; Higashijima, A ^[1]; Sakamoto, M ^[2]; Ejiri, A; Takase, Y ^[3]; Sakaguchi, M; Kalinnikova, E; Ishiguro, M; Tashima, S ^[4]

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1. Research Institute for Fusion Science, Kasuga, 816-8580 (Japan)
2. Plasma Research Center, Tsukuba Univ., Tsukuba, 305-8577 (Japan)
3. Department of Complexity Sci. and Eng., Univ. of Tokyo, 277-8561, Kashiwa (Japan)
4. Interdisciplinary Grad. School of Eng. Sci., Kyushu Univ., Kasuga, 816-8580 (Japan)

The phased-array antenna system for Electron Cyclotron/Bernstein Wave Heating and Current Drive experiments has been developed in the QUEST. The antenna was designed to excite a pure O-mode wave in the oblique injection for the O-X-B mode conversion experiments, and its good performances were confirmed at a low power level. The plasma current (<{approx}15 kA) with an aspect ratio of 1.5 was started up and sustained by only RF injection in the low-density operations. The long pulse discharge of 10 kA was also attained for 37 s. The new density window to sustain the plasma current was observed in the high-density plasmas. The single-null divertor configuration with the high plasma current (<{approx}25 kA) was attained in the 17 s plasma sustainment.

• OSTI ID: 21612521
• Journal Information: AIP Conference Proceedings, Vol. 1406, Issue 1; Conference: 9. topical conference on radio frequency power in plasmas, Newport (United States), 1-3 Jun 2011; Other Information: DOI: 10.1063/1.3665017; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ANTENNAS
ASPECT RATIO
BERNSTEIN MODE
CURRENT-DRIVE HEATING
DIVERTORS
ECR HEATING
ELECTRIC CURRENTS
ELECTRONS
MODE CONVERSION
PERFORMANCE
PLASMA
PLASMA DENSITY
PLASMA WAVES
START-UP
STEADY-STATE CONDITIONS
TOKAMAK DEVICES
WAVE PROPAGATION
CLOSED PLASMA DEVICES
CURRENTS
DIMENSIONLESS NUMBERS
ELECTRIC HEATING
ELECTRICAL EQUIPMENT
ELEMENTARY PARTICLES
EQUIPMENT
FERMIONS
HEATING
HIGH-FREQUENCY HEATING
JOULE HEATING
LEPTONS
OSCILLATION MODES
PLASMA HEATING
THERMONUCLEAR DEVICES