Development of Intense Proton Source and LEBT System in Compact Pulsed Hadron Source

A 2.45 GHz intense pulsed ECR proton source and low energy beam transport (LEBT) system was developed by Tsinghua University for the compact pulsed hadron source (CPHS). The proton injector provides proton beam into a 3.2 MeV RFQ accelerator. The 50 keV/75 mA hybrid beam extracted by a 4-electrode extraction system from the ion source passes through the LEBT to the RFQ entrance and the root-mean-square (RMS) normalized emittance is less than 0.2 πmm•mrad. The commissioning results of the intense proton source and low energy beam transport system were described in this paper. The beam quality was also studied.