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Report No.

Injection control development of the JT-60U electron cyclotron heating system

Hiranai, Shinichi; Shinozaki, Shinichi ; Sato, Fumiaki*; Suzuki, Yasuo*; Yokokura, Kenji; Moriyama, Shinichi; Ikeda, Yoshitaka

The JT-60U electron cyclotron heating (ECH) System injects a millimeteric wave at 110 GHz (EC beam) into the JT-60 Plasma, and heats the plasma or drives a current locally to enhance the confinement performance of the JT-60 plasma. The system consists of four sets of high power gyrotrons, high voltage power supplies and transmission lines, and two antennas that launch electron cyclotron (EC) beams toward the plasma. The key features of the injection control system are steering of the direction of the EC beam by driving the movable mirror in the antenna, and capability to set any combination of polarization angle and ellipticity by rotating the two grooved mirrors in the polarizers. This report represents the design, fabrication and improvements of the injection control system.



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