Research and development on the ion cyclotron range of frequency heating system in JT-60U

被引:7
作者
Moriyama, S [1 ]
Fujii, T
Kimura, H
Anno, K
Yokokura, K
Shinozaki, S
Terakado, M
Hiranai, S
机构
[1] Japan Atom Energy Res Inst, Naka Fus Res Estab, Naka, Ibaraki 3110193, Japan
[2] Ibaraki Univ, Hitachi, Ibaraki 3160033, Japan
关键词
ICRF; JT-60U; antenna;
D O I
10.13182/FST02-A241
中图分类号
TL [原子能技术]; O571 [原子核物理学];
学科分类号
0827 ; 082701 ;
摘要
Research and developments on the ion cyclotron range of firequency (ICRF) heating system in the JT-60 upgrade (JT-60U) are presented. The developments and experiences on the operation of the ICRF heating system contribute to its upgrade and to future ICRF heating systems in ITER. The ICRF heating system for JT-60U started operation in January 1992. RF power up to 7 MW for 1.1 sec at 116 MHz has been coupled to a plasma as a result of the developments described in this paper New high power tetrodes having pyrolitic graphite grids for higher dissipation of screen and control grids were tested in the ICRF amplifier, and 1.7 MW of the output power at 131 MHz for 5.4 seconds was achieved. This was the highest power level for fusion research above 110 MHz in 1990. A pair of phased loop antenna arrays (2 x 2) showed sufficiently high coupling resistance. To keep the impedance matching between the antenna and the transmission line, a frequency feedback control (FFC) system was developed, and its effectiveness was proved to couple high power RF continuously to the variable plasma. In ITER, enhancement of dielectric loss tangent of ceramics due to neutron irradiation will limit power injection capability of the antenna significantly. To solve this problem, an all-metal support (AMS) was developed in the JT-60U ICRF heating system as a substitute for a ceramic support of a central conductor of a coaxial antenna feeder in the ITER ICRF antenna.
引用
收藏
页码:467 / 481
页数:15
相关论文
共 28 条
[21]  
PARAIL VV, 1991, ITER DOCUMENTATION S, V32
[22]  
PARKER R, 1988, P INT C PLASM PHYS C, P14
[23]   ELECTRICAL DESIGN AND TEST OF ICRF ANTENNA FOR JT-60U [J].
SAIGUSA, M ;
FUJII, T ;
KIMURA, H ;
MORIYAMA, S ;
ANNOH, K ;
TERAKADO, M ;
KOBAYASHI, N .
FUSION ENGINEERING AND DESIGN, 1994, 24 (1-2) :47-64
[24]   HIGH COUPLING PERFORMANCE OF JT-60U ICRF ANTENNAS [J].
SAIGUSA, M ;
MORIYAMA, S ;
FUJII, T ;
KIMURA, H ;
SATO, M ;
HOSOGANE, N ;
NEMOTO, M ;
YAMAMOTO, T .
NUCLEAR FUSION, 1994, 34 (02) :276-282
[25]  
SAIGUSA M, 1992, P RAD FREQ HEAT CURR, P45
[26]  
WADE T, 1991, P 14 S FUS EN SAN DI
[27]  
Wade TJ, 1987, P 12 S FUS EN MONT, P1200
[28]  
WILSON R, 1995, FUSION TECHNOL, V1, P533