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Ogawa, Hiroaki; Sugie, Tatsuo; Kasai, Satoshi; Katsunuma, Atsushi*; Hara, Hirotsugu*
no journal, ,
no abstracts in English
laser for collective Thomson scattering diagnosticsKondoh, Takashi; Hayashi, Toshimitsu; Kawano, Yasunori; Kusama, Yoshinori; Sugie, Tatsuo
no journal, ,
A diagnostic of fusion-generated alpha-particles is important for burning plasmas, however, an effective measurement method has not yet been established. A collective Thomson scattering (CTS) diagnostic for the measurement of alpha particles is being developed using carbon dioxide (CO) lasers. To realize the CTS diagnostic, a high-repetition Transversely Excited Atmospheric (TEA) CO laser is being developed. In order to obtain single-mode output, which is needed for CTS diagnostic, seed laser is injected to the cavity with unstable resonator. Using this technique, output energy of 17 J in frequency of 15 Hz has been achieved with single-mode output. These results gives a prospect for the CTS diagnostic on International Thermonuclear Experimental Reactor (ITER), which requires energy of 20 J with repetition rate of 40 Hz. Proof-of-principle test will be performed with the improved laser system on the JT-60U tokamak.
Hatae, Takaki
no journal, ,
no abstracts in English
Kawano, Yasunori; Sakamoto, Yoshiteru; Suzuki, Takahiro; Fujimoto, Kayoko
no journal, ,
no abstracts in English
Yamaguchi, Taiki; Kawano, Yasunori; Kusama, Yoshinori
no journal, ,
no abstracts in English
Sato, Kazuyoshi; Omori, Junji; Ebisawa, Katsuyuki*; Kusama, Yoshinori; Neyatani, Yuzuru
no journal, ,
no abstracts in English