2018•JACOWOpen access
Tuning of a Four-vane RFQ for Xi'an 200 MeV Proton Application Facility
X. D. Yu, Xialing Guan, Qiankun Guo, Yu Lei, Pengfei Ma, Baichuan Wang, Xuewu Wang, Zhongming Wang, Qingzi Xing, Chen Guang Zhao, Shu-xin Zheng
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Abstract
This paper mainly describes the procedures and results of tuning a four-vane Radio Frequency Quadrupole (RFQ) accelerator for the Xi'an 200 MeV Proton Application Facility (XiPAF) project. The 3-meter-long RFQ will accelerate a 50 keV H⁻ beam from the ECR source to 3 MeV, and deliver it to the downstream drift tube linac (DTL) with a peak current of 5 mA, pulse length of 10-40 μs and maximum repetition rate of 0.5. The machining, assembly, and RF tuning of the RFQ cavity has been completed successfully. After tuning, the relative error of the operating quadrupole mode field is within ±2.7%, and the dipole mode com-ponent is within ±1.9% of the quadrupole mode. The RFQ now is ready for high-power RF conditioning.