Abstract
Experiments have been performed in two proton accelerators, at the Swiss Nuclear Research Institute (SIN) and at the LAMPF (Los Alamos, NM, USA) to establish the use of medium energy proton beams for simulation of first wall damage conditions. Due to the high penetrating power and low energy deposition of the beam, high helium and displacement damage can be introduced uniformly in large sample thicknesses. Values for helium retained have been established by analyses of irradiated samples and are in reasonable agreement with the calculated ones. Microstructural and mechanical properties of many materials irradiated by medium energy protons have been investigated. The results have encouraged both the Swiss and LAMPF-USA groups to design and construct new radiation facilities which will allow in-situ testing of larger specimens of most alloys of interest.
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