A 3-MeV RFQ accelerator for the Compact Pulsed Hadron Source at Tsinghua University

The design and construction status of the Radio Frequency Quadrupole (RFQ) accelerator for the Compact Pulsed Hadron Source (CPHS) at Tsinghua University is presented. The RFQ will accelerate protons from 50 keV to 3 MeV, with the RF frequency of 325 MHz. The total length of the RFQ cavity is about 3 m with the transmission rate of 97.2% predicted by PARMTEQM. Fine machining of the RFQ cavity was completed in July, 2011. The brazing of the vanes, the flanges and the cooling pipes has been finished in September, 2011.