TY - JOUR
T1 - Sorption and desorption behavior of hydrogen isotopes from tungsten deposits caused by deuterium gas or deuterium plasma exposure
AU - Ishikawa, Shinichiro
AU - Katayama, Kazunari
AU - Ohnishi, Yasuhito
AU - Fukada, Satoshi
AU - Nishikawa, Masabumi
N1 - Funding Information:
This research is partly financially supported by Grants-in-Aids for Scientific Research in Priority Areas of Tritium Science and Technology for Fusion Reactor (Contract number 19055006) and Grant-in Aid for Young Scientists (B) from the Japan Society for the Promotion of Science (KAKENHI 21760691).
PY - 2012/8
Y1 - 2012/8
N2 - To understand the behavior of hydrogen isotopes in deposits formed on plasma-facing wall is an important issue for development of a fusion reactor. In this study, sorption/desorption behaviors of hydrogen isotopes when tungsten deposits were exposed to deuterium gas or deuterium plasma at 300 °C were investigated. Samples of tungsten deposits were produced by the sputtering method using hydrogen plasma. After deuterium gas exposure or deuterium plasma exposure, the desorption behavior of hydrogen isotopes from the deposit was observed by the thermal desorption spectroscopy method. It was found that not a small amount of deuterium is retained in tungsten deposit by not only the plasma exposure but also the gas exposure while the amount of hydrogen incorporated in the deposit during sputter-deposition process is reduced. The amount of deuterium retained in the deposit by the plasma exposure was larger than that by the gas exposure in the experimental conditions in this work. The amount of hydrogen left after deuterium plasma exposure was larger than that after deuterium gas exposure.
AB - To understand the behavior of hydrogen isotopes in deposits formed on plasma-facing wall is an important issue for development of a fusion reactor. In this study, sorption/desorption behaviors of hydrogen isotopes when tungsten deposits were exposed to deuterium gas or deuterium plasma at 300 °C were investigated. Samples of tungsten deposits were produced by the sputtering method using hydrogen plasma. After deuterium gas exposure or deuterium plasma exposure, the desorption behavior of hydrogen isotopes from the deposit was observed by the thermal desorption spectroscopy method. It was found that not a small amount of deuterium is retained in tungsten deposit by not only the plasma exposure but also the gas exposure while the amount of hydrogen incorporated in the deposit during sputter-deposition process is reduced. The amount of deuterium retained in the deposit by the plasma exposure was larger than that by the gas exposure in the experimental conditions in this work. The amount of hydrogen left after deuterium plasma exposure was larger than that after deuterium gas exposure.
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U2 - 10.1016/j.fusengdes.2012.03.021
DO - 10.1016/j.fusengdes.2012.03.021
M3 - Article
AN - SCOPUS:84865759213
SN - 0920-3796
VL - 87
SP - 1390
EP - 1394
JO - Fusion Engineering and Design
JF - Fusion Engineering and Design
IS - 7-8
ER -