FULL TEXT (PDF, 3105 KB)
Y. Kubota, S. Noda, A. Sagara, N. Inoue, K. Akaishi, O. Motojima
"Electron Beam Irradiation Test Facility for Research and Development of PlasmaFacing Components"
Date of publication:
LHD, divertor, ACT, brazed component, heat flux, carbon, graphite, active cooling, electron beam
To develop a reliable divertor plate for large helical device(LHD), a test facility called ACT(Active Cooling Teststand) has been constructed in Toki site. The facility can generate 100 kW electron beams with beam energy of 30keV as a heat source, which can irradiate with a heat flux of up to 100 MW/m^2 to a test sample piece steadily. The beam irradiation area on the sample can be changed from 1 to 400 cm^2 with a 64 step controller electrically By using the ACT, the thermal fatigue tests of various kinds of carbon-copper brazed components are being performed under the heat loads of 2.5-14 MW/m^2. The test results show that several brazed components are applicable as the divertor plates for the first stage of LHD operation, namely with maximum heat load of 10 MW/m^2 for 5 seconds discharge durations.
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