A 60 MeV ultra-compact proton accelerator for proton radiation effects in China.

The PREF project (Proton Radiation Effects Facility) aims to provide low to medium energy protons from 10–60 MeV, which is an excellent range for experimental research on the displacement damage effect studies of satellites and payload components, and is currently under construction in China. Average proton beam fluxes range from tens of particles/( cm 2 s) up to approximately 1 0 8 particles/( cm 2 s), spot sizes after scanning range from 2 × 2 cm 2 to 20 × 20 cm 2 , and uniformity is better than 95%. It comprises a 2.45 GHz ion source, a 325 MHz four-vane RFQ linac injector, a compact synchrotron, and two irradiation terminals. Protons will be injected into synchrotron using multi-turn injection scheme to obtain high-gain beam accumulation. The third-order resonance slow extraction scheme is adopted to achieve high efficiency and continuous uniform extraction of the beam for irradiation experiments. Several innovative accelerator technologies such as titanium alloy lined thin-wall vacuum chamber and fast ramping rate full energy storage power supply are also adopted. In this paper, the general design and simulation results of the accelerator complex are presented, and the new technology and progress of the PREF project are briefly introduced. [ABSTRACT FROM AUTHOR]