Radio-Frequency Power Test of a Four-Rod RFQ Accelerator for PKUNIFTY
Radio-Frequency Power Test of a Four-Rod RFQ Accelerator for PKUNIFTY
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PKUNIFTY 四杆 RFQ 加速器的射频功率测试
DOI：
10.1088/0256-307x/29/6/062901
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发表时间：
2012-05
影响因子：
3.5
通讯作者：
Chen Jia-Er
中科院分区：
文献类型：
--
作者：
Chen Wei;Zhou Quan-Feng;Zhu Kun;Xia Wen-Long;Shi Ben-Liang;Gao Shu-Li;Yan Xue-Qing;Guo Zhi-Yu;Chen Jia-Er
为北京大学中子成像装置设计、制造、安装和调试了一台四棒射频四极加速器。该加速器长2699.6mm，平均孔径半径3.88mm，工作频率201.5MHz，脉冲工作。需要70 kV的电极间电压来将注入的50 keV 40 mA D+离子加速到2 MeV。我们介绍了射频系统，高射频功率馈线设计，低射频测量和高射频功率测试。特别是，进行了射频调试，射频功率高达~280 kW，占空比为4%。测量的X射线谱表明，射频极间电压达到70.7 kV。实验结果表明，该谐振腔的分流比阻抗可达52.7k Ωm.
A four-rod radio frequency quadruple (RFQ) accelerator is designed, manufactured, installed and commissioned for the Peking University Neutron Imaging Facility (PKUNIFTY). This 2699.6-mm-long RFQ accelerator with the mean aperture radius of 3.88mm is operating at 201.5 MHz in pulse mode. An inter-electrode voltage of 70 kV is needed to accelerate the injected 50 keV 40 mA D+ ions up to 2 MeV. We present the rf system, high rf power feeder design, lower rf measurements and higher rf power test. Especially, the rf commissioning was carried out with rf power up to ~280 kW and duty factor of 4%. The measured x-ray spectrum shows that the rf inter-electrode voltage reaches 70.7 kV. It is found that the specific shunt impedance of the RFQ cavity reaches 52.7 kΩm.