The second SINQ target irradiation program, STIP-II

Abstract The second SINQ Target Irradiation Program (STIP-II) was performed in 2000 and 2001. More than 2000 specimens from more than 40 kinds of materials were irradiated up to 20 dpa and 1800 appm He in a temperature range of 80–450 °C. While the majority of specimens were irradiated in He gas environment, some specimens were in contact with liquid Hg and Pb-Bi. Neutron radiography was performed before and after irradiation, which indicated that Hg has leaked from one Hg-filled capsule, probably during a short temperature excursion caused by beam focusing. Specimens irradiated in He gas environment were unpacked and sorted. Except for TEM and dosimetry discs, almost all the other specimens were retrieved. About 20% of TEM and dosimetry discs were lost. Most of them are from brittle materials. Neutronics calculations were performed using the proton distribution profile obtained by γ-mapping on the beam window of the AlMg 3 target container. The calculated He and H concentrations will be corrected with the results of measurements on some selected samples.