Title :
Remote steering antenna system on the TRIAM-1M tokamak
Author :
Idei, H. ; Hanada, K. ; Ohkubo, K. ; Hasegawa, M. ; Notake, T. ; Kubo, S. ; Shimozuma, Takashi ; Ito, S. ; Sato, K.N. ; Zushi, H. ; Nakamura, K. ; Sakamoto, M. ; Iyomasa, A. ; Kawasaki, S. ; Nakashima, H. ; Higashijima, A. ; Nishi, S.
Author_Institution :
Res. Inst. for Appl. Mech., Kyushu Univ., Kasuga, Japan
fDate :
27 Sept.-1 Oct. 2004
Abstract :
A remote steering antenna designed as a symmetric direction antenna is prepared for electron cyclotron heating (ECH) and current drive (ECCD) experiments on the TRIAM-1M tokamak. The steering angles of 8-19 degrees are available in the design, in addition to the angle near 0 degrees. The antenna is tested at both of high and low power levels. The fraction of radiated power to injected power at the antenna is roughly evaluated at the low power test. The angle radiated from the antenna is checked from both of the intensity and phase measurements at the low power test. Several percentage losses at the antenna are evaluated at the high power test. The antenna system is evaluated to work correctly.
Keywords :
Tokamak devices; antennas in plasma; beam steering; directive antennas; intensity measurement; phase measurement; plasma filled waveguides; plasma radiofrequency heating; waveguide antennas; TRIAM-1M tokamak; electron cyclotron current drive; electron cyclotron heating; injected power; intensity measurements; phase measurements; radiated power; remote steering antenna system; symmetric direction antenna; Design engineering; Directive antennas; Heating; Indium tin oxide; Mirrors; Optical waveguides; Power generation; Testing; Tokamaks; Transmitting antennas;
Conference_Titel :
Infrared and Millimeter Waves, 2004 and 12th International Conference on Terahertz Electronics, 2004. Conference Digest of the 2004 Joint 29th International Conference on
Print_ISBN :
0-7803-8490-3
DOI :
10.1109/ICIMW.2004.1422297
