On behaviour of W–Cu composition as a candidate divertor material under irradiation by high intensive hydrogen plasma

The behaviour and erosion of tungsten, copper and W–Cu composition under irradiation by high intensive hydrogen plasma have been investigated. The erosion coefficients of these materials have been determined. The importance of copper redeposition in the mechanism of sputtering and erosion of W–Cu composition has been emphasised. It has been supposed that the process of tungsten recrystallisation and cracking under pulse irradiation by thermal hydrogen plasma was radiation-induced.