RFQ1, a 100% duty factor radio-frequency quadrupole (RFQ) to accelerate 75 mA of protons to a final energy of 0.6 MeV, is a testbed for a wide range of high-power RFQ experiments. First beam was accelerated in RFQ1 in July 1988, and an experimental program to investigate the beam parameter space of the machine was started. With the initial three-beamlet ion sources adjusted to deliver 5 mA to the RFQ, only 35% of the beam was captured and accelerated to design energy. Changing to a lower emittance single-beamlet source, transmission improved to almost 80% with over 6 mA CW (continuous wave) accelerated. The realization of the replaceable component design of the RFQ, CW operation of vane coupling rings and the ability of the racetrack seals to maintain vacuum and RF integrity over large temperature gradients were demonstrated. Design deficiencies in the injector that spoil the match to the RFQ have been identified, and TRANSPORT and PARMTEQ were used to examine corrective measures.
展开▼
机译：RFQ1是一种100％占空比射频四极（RFQ），可将75 mA的质子加速至0.6 MeV的最终能量，是各种高功率RFQ实验的试验台。 1988年7月在RFQ1中加速了第一束光束，并开始了一个实验程序来研究机器的光束参数空间。将最初的三束子离子源调整为向RFQ输送5 mA电流，仅捕获了35％的束并将其加速以达到设计能量。改用低发射率的单束子源，在超过6 mA CW（连续波）加速的情况下，透射率提高到了近80％。展示了RFQ的可替换组件设计，叶片联接环的CW操作以及跑道密封件在较大温度梯度下保持真空和RF完整性的能力。已经确定了喷油器的设计缺陷会破坏与RFQ的匹配，并且使用TRANSPORT和PARMTEQ来检查纠正措施。
展开▼
