Visualized Blow-off from Helium Irradiated Tungsten in Response to ELM-like Heat Load
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概要
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Laser-induced blow-off from a tungsten surface that was exposed to helium plasma is investigated experimentally in the divertor simulator NAGDIS-II. The pulse width of the laser is submillisecond and is similar to the duration of type-I edge localized modes in ITER. The temporal evolution of blow-off particles, which are visualized by the electron impact excitation in the surrounding plasma, is investigated by using filter spectroscopy. We demonstrate the effect of helium irradiation damages on the tungsten ejection behavior in response to a transient heat load.
著者
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Ohno Noriyasu
Graduate School Of Engineering Nagoya University
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Takagi Makoto
Graduate School Of Engineering Kyushu University
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KAJITA Shin
EcoTopia Institute of Nagoya University
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SAKAGUCHI Wataru
Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
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