Tritium Decontamination from Co-deposited Layer on Tungsten Substrate by Ultra Violet Lamp and Laser
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概要
- 論文の詳細を見る
Tritium decontamination using ultra violet (UV) lamp and laser was performed. Simulated co-deposited layer on tungsten substrate was deposited by C2H2 or C2D2 glow discharge. The co-deposited layer was irradiated to UV lights from a xenon excimer lamp (172 nm) or ArF excimer laser (193 nm) and the in-situ decontamination behavior was evaluated by a mass spectrometer. After the UV irradiation, the hydrogen concentration in the co-deposited layer was evaluated by elastic recoil detection analysis (ERDA) and the depth profile was analyzed by secondary ion mass spectrometry (SIMS).For the co-deposited layer formed by C2D2 glow discharge, it was found that M/e 3 (HD) gas was released mainly during the UV lamp irradiation while both M/e 3 (HD) and M/e 4 (D2) gases were detected during the UV laser irradiation. Though the co-deposited layer was not removed by UV lamp irradiation, almost all the co-deposited layer was removed by UV laser irradiation within 1 min. The ratio of hydrogen against carbon in the co-deposited layer was estimated to be 0.53 by ERDA and the number of photon needed for removing 1 μm thick co-deposited layer was calculated to be 3.7×1018 cm−2 for the UV laser by SIMS measurement. It is concluded that C-H (C-D) bond on the co-deposited layer were dissociated by irradiation of UV lamp while the co-deposited layer itself was removed by the UV laser irradiation.
- 社団法人 日本原子力学会の論文
- 2001-11-25
著者
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Hayashi Takumi
Tritium Engineering Laboratory Japan Atomic Energy Research Instite
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NISHI Masataka
Tritium Engineering Laboratory, Japan Atomic Energy Research Instite
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Nishi Masataka
Tritium Engineering Laboratory Department Of Fusion Engineering Research Japan Atomic Energy Researc
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Oya Yasuhisa
Tritium Engineering Laboratory Department Of Fusion Engineering Research Japan Atomic Energy Researc
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TADOKORO Takahiro
Tritium Engineering Laboratory, Department of Fusion Engineering Research, Japan Atomic Energy Resea
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SHU Wataru
Tritium Engineering Laboratory, Department of Fusion Engineering Research, Japan Atomic Energy Resea
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Shu W
Japan Atomic Energy Res. Inst. Ibaraki
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Shu Wataru
Tritium Engineering Laboratory Japan Atomic Energy Research Institute
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Tadokoro Takahiro
Tritium Engineering Laboratory Department Of Fusion Engineering Research Japan Atomic Energy Researc
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Hayashi Takumi
Tritium Engineering Laboratory Department Of Fusion Engineering Research Japan Atomic Energy Researc
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O'hira Shigeru
Tritium Engineering Laboratory Department Of Fusion Engineering Research Japan Atomic Energy Researc
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