Research and development of high power wide-band polarizer for ECCD system in JT-60SA

Sugiyama, Naoya*; Oyama, Gaku*; Matsubara, Fumiaki*; Saigusa, Mikio*; Isayama, Akihiko; Kobayashi, Takayuki; Moriyama, Shinichi

no journal, , 

The development status of a wide-band polarizer for ECCD system in JT-60SA is reported. The polarizer was designed at the frequency bands of 110, 130 and 140 GHz based on the simulation results with the finite differential time domain (FDTD) method. The properties of polarizer have been measured with low power test at both of the frequency bands of 110 GHz and 138 GHz. In future work, it is necessary to draw the Poincare sphere based on an experimental result, and to optimize the depth of the grooved mirrors. After that, the wide-band polarizer with a cooling system will be designed, fabricated and tested at high power up to 1 MW.