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Please use this identifier to cite or link to this item: http://hdl.handle.net/11133/2167

Title: ヘリウム損傷ナノ構造形成タングステンの冷却特性と損傷回避法
Other Titles: ヘリウム ソンショウ ナノ コウゾウ ケイセイ タングステン ノ レイキャク トクセイ ト ソンショウ カイヒホウ
Cooling Characteristics and Mitigation of He-Defected Tungsten with Nanostructured Surface
Authors: 髙村, 秀一
宮本, 隆徳
大野, 哲靖
MIYAMOTO, Takanori
OHNO, Noriyasu
Issue Date: 31-Mar-2013
Publisher: 愛知工業大学
Abstract: Precise evaluation of radiation cooling capability of the tungsten with fiber-form nanostructure is done using an electron beam power calibration system. It is found that the total emissivity of black nanostructured tungsten is very close to 1.0, meaning a complete black body. Discrepancies for the determination of total emissivity between the electron beam method and the fixed biasing procedure were discussed in terms of energy transmission through the plasma sheath, focusing on the ion energy reflection and the cooling associated by secondary electron emission. Some recovery techniques to obtain an almost original flat tungsten surface from nanostructured one is introduced, emphasizing on ITER-grade tungsten. Finally the effect of thin carbon layer on the formation of nanostructure on the tungsten surface is demonstrated as a mitigation technique.
URI: http://hdl.handle.net/11133/2167
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