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Diagnostics system of JT-60U

Sugie, Tatsuo; Hatae, Takaki; Koide, Yoshihiko; Fujita, Takaaki; Kusama, Yoshinori; Nishitani, Takeo; Isayama, Akihiko; Sato, Masayasu; Shinohara, Koji; Asakura, Nobuyuki; Konoshima, Shigeru; Kubo, Hirotaka; Takenaga, Hidenobu; Kawano, Yasunori; Kondoh, Takashi; Nagashima, Akira; Fukuda, Takeshi; Sunaoshi, Hidenori; Naito, Osamu; Kitamura, Shigeru; Tsukahara, Yoshimitsu; Sakasai, Akira; Sakamoto, Yoshiteru; Suzuki, Takahiro; Tobita, Kenji; Nemoto, Masahiro; Morioka, Atsuhiko; Ishikawa, Masao*; Ishida, Shinichi; Isei, Nobuaki; Oyama, Naoyuki; Neyatani, Yuzuru; Itami, Kiyoshi; Sakurai, Shinji; Tamai, Hiroshi; Tsuchiya, Katsuhiko; Higashijima, Satoru; Nakano, Tomohide; Nagaya, Susumu; Chiba, Shinichi; Lee, S.; Shitomi, Morimasa

The diagnostic system of JT-60U (JT-60upgrade) is composed of about 50 individual diagnostic devices. Recently, the detailed radial profile measurements of plasma parameters have been improved, so that the internal structure of plasmas has been explored. The understanding of plasma confinement has been enhanced by density and temperature fluctuation measurements using a mm-wave reflectometer and electron cyclotron emission measurements respectively. In addition, the real-time control experiments of electron density, neutron yield, radiated power and electron temperature gradient have been carried out successfully by corresponding diagnostic devices. These measurements and the real time control contribute to improving plasma performance. Diagnostic devices for next generation fusion devices such as a CO2 laser interferometer/polarimeter and a CO2 laser collective Thomson scattering system have been developed.

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Category:Nuclear Science & Technology

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