Demonstration of Steady State Operation with 1 MW of 170 GHz gyrotron for ITER

Journal Article · Fri Sep 28 00:00:00 EDT 2007 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2800519· OSTI ID:21035894

Kasugai, Atsushi; Takahashi, Koji; Kajiwara, Ken; Kobayashi, Noriyuki; Sakamoto, Keishi ^[1]

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1. Fusion Research and Development Directorate, Japan Atomic Energy Agency (JAEA) 801-1 Mukoyama, Naka, Ibaraki 311-0193 (Japan)

A quasi-steady-state operation of 1 MW/800 s with the efficiency of 55%, which exceeded 1 MW/500 s/50% of the performance required in ITER, was demonstrated in a 170 GHz gyrotron. The oscillation characteristics in the long pulse operation was clarified, and the operation scenario to the hard self-excitation region for the high efficiency oscillation was newly established by controlling a pitch factor of the electron and the cavity magnetic field during the pulse with fixed beam voltage in the triode MIG. The result gives a clear outlook for the success of ECH and ECCD in ITER.

• OSTI ID: 21035894
• Journal Information: AIP Conference Proceedings, Vol. 933, Issue 1; Conference: 17. topical conference on radio frequency power in plasmas, Clearwater, FL (United States), 7-9 May 2007; Other Information: DOI: 10.1063/1.2800519; (c) 2007 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
ECR CURRENT DRIVE
ECR HEATING
EFFICIENCY
ELECTRIC POTENTIAL
ELECTRONS
EXCITATION
GHZ RANGE
ITER TOKAMAK
MAGNETIC FIELDS
MICROWAVE AMPLIFIERS
OPERATION
OSCILLATIONS
PLASMA
PLASMA INSTABILITY
PULSES
RF SYSTEMS
STEADY-STATE CONDITIONS