Journal Article High power test of wideband polarizer for electron cyclotron current driving system in JT-60SA

Horie, Naoyuki  ,  Omori, Kohei  ,  Saigusa, Mikio  ,  小林, 貴之  ,  森山, 伸一  ,  Arata, Hiroshi  ,  Uno, Tsuyoshi

122pp.218 - 222 , 2018-05
ISSN:0920-3796
Description
A wideband polarizer consisting of a polarization twister and a circular polarizers have been developed for the Electron Cyclotron Current Drive system in JT-60SA at the frequencies of 110 GHz and 138 GHz. Ohmic loss of the polarization twister has been evaluated with high power test of 0.3 MW, 10 s at 110 GHz and 138 GHz. The Ohmic loss of the polarization twister made by machining process is 0.20% ∼0.57%. Moreover, the wideband polarization twister was tested up to 0.9 MW for 20 s at 110 GHz and 138 GHz.

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