Alleviation of Helium Holes/Bubbles on Tungsten Surface by Use of Transient Heat Load
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概要
- 論文の詳細を見る
The alleviation effect of transient heat load on helium holes/bubbles has been demonstrated using ruby laser pulses for the transient heat source in the divertor simulator NAGDIS-II. It is shown that the holes and bubbles disappeared following the irradiation of the ruby laser pulses, while the surface roughness was significantly enhanced by the irradiation of the Nd:YAG laser pulses. Based on the numerically calculated temperature in the specimen, the physical mechanism causing this difference is discussed particularly in terms of pulse width (0.6 ms for ruby laser without a Q-switch and 5 ns for Nd:YAG laser with a Q-switch).
著者
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TAKAMURA Shuichi
Graduate School of Engineering, Nagoya University
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Kajita Shin
Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-8656, Japan
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Ohno Noriyasu
EcoTopia Research Institute, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
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NISHIMOTO Tentaro
Department of Engineering, Nagoya University
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KAJITA Shin
Graduate School of Engineering, Nagoya University
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