分离作用射频四极场加速器频率调谐和高功率试验
Frequency tuning and high power test for separated function radio frequency quadruple accelerator
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摘要: 在分离作用射频四极场（SFRFQ）加速腔中加入频率调谐装置，用步进电机驱动调谐杆运动，改变调谐板在腔中的位置来改变调谐板与支撑环之间的分布电容，从而改变SFRFQ腔的工作频率，使其谐振频率为26.07 MHz，实现了RFQ和SFRFQ组合加速系统频率的匹配。在完成两腔频率调谐的基础上进行了SFRFQ腔体1/6占空比高功率试验，轫致辐射谱的测量表明,SFRFQ极间电压在入射峰值功率为28.8 kW时已达到86.2 kV，超过了设计指标的70.0 kV。Abstract: A step motor for frequency tuning was installed inside the separated function radio frequency quadruple(SFRFQ) accelerator. The operating frequency of the SFRFQ cavity can therefore be precisely tuned at 26.07 MHz either manually or by computer algorithm, and then the resonant frequency match can be achieved between SFRFQ and RFQ cavities in our combined accelerator system. Also the roentgen spectrum in the high power test of the SFRFQ cavity shows that the inter-vane voltage reaches 86.2 kV, exceeding the design value 70 kV, when the input signal has 1/6 duty cycle and 28.8 kW peak power.
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