MEASUREMENT OF A KNOCK-ON PROCESS-INDUCED BY AN ION-BEAM

Understanding of collision processes, which are induced by irradiation of neutrons and ions, is important for predicting the material perfor mance in operational fission and proposed fusion reactors. Specially, an energetic primary knock-on atom was irradiated (PKA) plays a crucia l role in the production of collision cascade damage. The target of si ngle phase TiD1.61 by ion beams of He-4 and He-3 with energies of 50, 100, 150 and 200 keV. In the experiments with a He-3 ion beam, the deu terium density in the target was monitored by the detection of a nucle ar reaction of D(He-3, p)alpha. plot. A high energy primary knock-on p rocess has been successfully observed by monitoring the nuclear reacti on of D(d, p)t. Experimental results were compared with the results ca lculated by the Monte Carlo code TRIM. It was confirmed that the Monte Carlo code can successfully predict the production of energetic prima ry knock-on atoms under irradiation of the ion beam. (C) 1997 Elsevier Science B.V.