Development of 1 MeV H[sup −] Accelerator at JAEA for ITER NB

Abstract

This paper reports the recent activities at JAEA for the development of 1 MeV H− ion accelerator toward the ITER NBI. For the development of MAMuG accelerator, a 320 mA H− ion beam was successfully accelerated as the highest record in the world at the MeV class energy (796 keV). This was achieved by protecting the H− ion source from the high heat load by the backstream positive ions, which was produced during the high current H− ion acceleration. The SINGAP accelerator was tested at JAEA to compare the performance of the SINGAP and the MAMuG. This paper also reports the results of the SINGAP test and the comparison between the SINGAP and the MAMuG is discussed.