High power, long pulse millimeter (mm) wave experiments of the RF test stand (RFTS) of Japan Atomic Energy Agency (JAEA) were performed. The system consists of a 1 MW/170 GHz gyrotron, a long and short distance transmission line (TL), and an equatorial launcher (EL) mock-up. The RFTS has an ITER-relevant configuration, i.e., consisted by a 1 MW-170 GHz gyrotron, a mm wave TL, and an EL mock-up. The TL is composed of a matching optics unit, evacuated circular corrugated waveguides, 6-miter bends, an in-line waveguide switch, and an isolation valve. The EL-mock-up is fabricated according to the current design of the ITER launcher. The Gaussian-like beam radiation with the steering capability of 20°–40° from the EL mock-up was also successfully proved. The high power, long pulse power transmission test was conducted with the metallic load replaced by the EL mock-up, and the transmission of 1 MW/800 s and 0.5 MW/1000 s was successfully demonstrated with no arcing and no damages. The transmission efficiency of the TL was 96%. The results prove the feasibility of the ITER electron cyclotron heating and current drive system.
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June 2011
Research Article|
June 23 2011
High power millimeter wave experiment of ITER relevant electron cyclotron heating and current drive system
K. Takahashi;
K. Takahashi
1
Japan Atomic Energy Agency
, 801-1 Mukoyama, Naka, Ibaraki 311-0193, Japan
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K. Kajiwara;
K. Kajiwara
1
Japan Atomic Energy Agency
, 801-1 Mukoyama, Naka, Ibaraki 311-0193, Japan
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Y. Oda;
Y. Oda
1
Japan Atomic Energy Agency
, 801-1 Mukoyama, Naka, Ibaraki 311-0193, Japan
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A. Kasugai;
A. Kasugai
1
Japan Atomic Energy Agency
, 801-1 Mukoyama, Naka, Ibaraki 311-0193, Japan
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N. Kobayashi;
N. Kobayashi
1
Japan Atomic Energy Agency
, 801-1 Mukoyama, Naka, Ibaraki 311-0193, Japan
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K. Sakamoto;
K. Sakamoto
1
Japan Atomic Energy Agency
, 801-1 Mukoyama, Naka, Ibaraki 311-0193, Japan
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J. Doane;
J. Doane
2
General Atomics
, P.O. Box 85608, San Diego, California 92186-5608, USA
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R. Olstad;
R. Olstad
2
General Atomics
, P.O. Box 85608, San Diego, California 92186-5608, USA
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M. Henderson
M. Henderson
3
ITER Organization
, CS90 046, 13067 St. Paul lez Durance Cedex, France
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Rev. Sci. Instrum. 82, 063506 (2011)
Article history
Received:
March 09 2011
Accepted:
May 19 2011
Citation
K. Takahashi, K. Kajiwara, Y. Oda, A. Kasugai, N. Kobayashi, K. Sakamoto, J. Doane, R. Olstad, M. Henderson; High power millimeter wave experiment of ITER relevant electron cyclotron heating and current drive system. Rev. Sci. Instrum. 1 June 2011; 82 (6): 063506. https://doi.org/10.1063/1.3599418
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