ヘリウムプラズマ照射によるタングステン表面に形成された繊維状ナノ構造の特性評価

Abstract

The surface cooling mechanisms of nanostructured tungsten are reported in terms of a decrease in secondary electron emission and an increase in radiation emissivity. The suppression of physical sputtering of nanostructured tungsten bombarded by argon ions is demonstrated, showing a surface morphology which gives a minimum sputtering yield. Recovery of He – defected tungsten towards flat surface is shown for Powder Metallurgy Tungsten and ITER grade-W. TFGR W - 1.1%TiC/H gives a slower recovery process than PM-W.