CAJ | 학술논문

设计了用于PKU-FEL注入器的腔式位置诊断装置.该BPM腔采用的偶极模TM110模的频率与PKU-FEL主加速器的基模频率一致,都是1.3 GHz；通过在圆形腔上镶入两个完全一致的矩形腔解决了腔式BPM的Cross-Talk问题. 根据PKU-FEL的设计要求,所设计的BPM腔的最小位置响应约10 μm,动态范围大于30 mm,时间响应小于束团间距.还估算了该BPM腔引起的束团功率损耗.结果表明,BPM腔引起的束团功率损耗是可以忽略的.
설계료용우PKU-FEL주입기적강식위치진단장치.해BPM강채용적우겁모TM110모적빈솔여PKU-FEL주가속기적기모빈솔일치,도시1.3 GHz；통과재원형강상양입량개완전일치적구형강해결료강식BPM적Cross-Talk문제. 근거PKU-FEL적설계요구,소설계적BPM강적최소위치향응약10 μm,동태범위대우30 mm,시간향응소우속단간거.환고산료해BPM강인기적속단공솔손모.결과표명,BPM강인기적속단공솔손모시가이홀략적.
A cavity beam position monitor (BPM) is designed for the injector of PKU-FEL Facility. The designed frequency of the dipole mode TM110 is 1.3 GHz, which is equal to the frequency of the main accelerator in PKU-FEL Facility. The cross-talk problem is solved by introducing two rectangular recesses into the cavity. The position resolution of the cavity BPM is about 10 μm, the dynamic range is more than 30 mm and the time response is bunch to bunch, which are sufficient for the PKU-FEL injector. Compared with the bunch power, the power dissipation of the main resonant modes excited by e-bunches can be neglected.