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Imazawa, Ryota; Ono, Takehiro; Kawano, Yasunori
no journal, ,
no abstracts in English
Takeuchi, Masaki; Sugie, Tatsuo; Ogawa, Hiroaki; Ishikawa, Masao; Shimada, Takahiko; Kusama, Yoshinori
no journal, ,
In ITER project, it reports on the progress of the conceptual design of Divertor IR Thermography which is one of the diagnostics Japan is in charge of development. The conceptual design of the optical system was done based on the measurement requirement, and the performance was evaluated. The angle of field of view is 2.5 degree for the outer divertor and 4.0 degree for the inner divertor, therefore wide fields of view are achieved. The spatial resolution fills 3 mm of the measurement requirement in the center field of view though it depends on the observed wavelength. Moreover, nuclear heating of mirrors in the optical system is 0.1 W / cc excluding the first mirror. The prospect that the mirrors can be cooled is obtained. Future tasks include optimization of the optical system that spatial resolution coexists with neutron shielding, development of calibration method and the mechanical designs of shutters and mirror holders.
Yatsuka, Eiichi; Hatae, Takaki; Kusama, Yoshinori
no journal, ,
no abstracts in English
Sato, Kazuyoshi; Imazawa, Ryota; Ono, Takehiro; Kawano, Yasunori
no journal, ,
no abstracts in English
Ishikawa, Masao; Kondoh, Takashi
no journal, ,
Fusion power and its time evolution on ITER will be evaluated in terms of the total neutron emission rate as measured with neutron flux monitors. Since a level of accuracy within 10% is required for evaluation of the fusion power in ITER, the relation between the neutron monitor outputs and the total neutron emission rate must exceed this accuracy level in an absolute sense. In ITER, the absolute calibration factors of the neutron flux monitors will be obtained by means of a neutron in-situ calibration procedure. The basic strategy of the in-situ calibration has been studied.
Ogawa, Hiroaki; Sugie, Tatsuo; Takeuchi, Masaki; Kusama, Yoshinori
no journal, ,
no abstracts in English
Kusama, Yoshinori
no journal, ,
no abstracts in English