リチウムによる低Zコ-ティングと水素挙動

概要

論文の詳細を見る
Lithium thin films were in-situ deposited inside a discharge chamber with use of a vacuum evaporation method. A strong pumping effect was observed when lithium coated surfaces were exposed to a hydrogen plasma. Hydrogens were absorbed by lithium films up to the saturation density of 6.8 × 10<SUP>22</SUP>atoms cm<SUP>-3</SUP>. A time variation of hydrogen pressure was explained very well by a one dimentional model with the hydrogen implantation and diffusion processes taken into account. An optical emission measurement of a hydrogen plasma revealed that sputtered or vaporized lithium atoms are localized near the coated wall. The redeposition process of lithium was confirmed, using a sample probe technique. Observed chemical activities of lithium for oxygens will be useful for suppressing oxygen impurities in a fusion plasma.
社団法人プラズマ・核融合学会の論文