TY - JOUR
T1 - High-heat-flux test of commercial graphite tiles by high current and low energy electron beam
AU - Fujitsuka, M.
AU - Shikama, T.
AU - Yamauchi, Y.
AU - Shinno, H.
AU - Okada, M.
N1 - Funding Information:
The authorsw ould like to expresst heir gratitudet o Prof. A. Miyahara at Nagoya University and to Prof. T. Yamashina at Hokkaido University for their valuable discussions. This work was partly supported by a Grant-in Aid for Fusion Researchf rom Ministry of Education,S ciencea nd Culture in Japan.
PY - 1988/5
Y1 - 1988/5
N2 - High-heat-flux tests were carried out on 14 commercially available isotropic graphite samples manufactured by six Japanese companies. Graphite tiles of 25 × 25 × 1.0 mm3 were irradiated by an electron beam in an area of 18 mm diameter. The electron beam used was of low energy and high current, namely 40-50 V and 100-200 A, to simulate the near-surface deposition of energy. The beam was also defocussed to flatten the energy deposition profile through the irradiation area of 18 mm diameter. A computer simulation technique using the finite-element method was conducted to analyze the experimental results. Experimental results show that one sample which has some anisotropy revealed excellent resistance against high heat flux. Other graphite samples endured heat fluxes of 1-1.5 kW/cm2, irrespective of variation of their properties. Experimental results suggest that the ash content, the thermal expansion coefficient, and the mechanical strength may affect the resistance against the heat flux.
AB - High-heat-flux tests were carried out on 14 commercially available isotropic graphite samples manufactured by six Japanese companies. Graphite tiles of 25 × 25 × 1.0 mm3 were irradiated by an electron beam in an area of 18 mm diameter. The electron beam used was of low energy and high current, namely 40-50 V and 100-200 A, to simulate the near-surface deposition of energy. The beam was also defocussed to flatten the energy deposition profile through the irradiation area of 18 mm diameter. A computer simulation technique using the finite-element method was conducted to analyze the experimental results. Experimental results show that one sample which has some anisotropy revealed excellent resistance against high heat flux. Other graphite samples endured heat fluxes of 1-1.5 kW/cm2, irrespective of variation of their properties. Experimental results suggest that the ash content, the thermal expansion coefficient, and the mechanical strength may affect the resistance against the heat flux.
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U2 - 10.1016/0022-3115(88)90322-4
DO - 10.1016/0022-3115(88)90322-4
M3 - Article
AN - SCOPUS:0024014511
VL - 152
SP - 163
EP - 168
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
SN - 0022-3115
IS - 2-3
ER -