The 6 MV tandem accelerator system at the University of Tsukuba become available for a period of time at the end of 2015 when the beam line system for evaluating devices for space use was installed by the parties involved at the University of Tsukuba and the Japan Aerospace Exploration Agency (JAXA). The ion beam profile (uniformity, beam flux, heavy ion energy) was preliminarily evaluated, and use of the accelerator system for radiation testing regarding space applications was confirmed.