Hydrogen depth profile of Al-alloy vacuum chamber exposed to synchrotron radiation

Outgassing from aluminum surface layer induced by synchrotron radiation

“…Kanazawa et al measured the hydrogen depth profile for an aluminum vacuum chamber which had been exposed to SR. 1 The surface irradiated directly with SR shows the least hydrogen content which is about 1/10 that of an unirradiated surface. This hydrogen concentration is the source of H 2 desorption during exposure to SR. Kanazawa et al pointed out that most of this hydrogen is contained in a surface oxide layer of aluminum.…”