论文部分内容阅读
加速器驱动次临界系统C-ADS注入器Ⅱ采用强流超导质子直线加速器,设计流强达到10 m A。强流质子束产生的束流损失有可能损伤超导腔,需要专用的束流损失监测系统进行监测,束流损失探测器(BLM)需要在高能量沉积导致超导腔失超之前提供警报。通过MCNPX模拟计算10 Me V质子在半波谐振腔(HWR)不同位置损失产生的辐射场,比较选取超导腔管道进出口处4个位置为推荐束损探测器放置的位置,结合HWR腔结构和束损探测器选择的影响因素,计算了次级辐射在金刚石探测器中的能量沉积以及1°～5°不同质子入射角度对探测的影响。结果表明,根据不同位置处探测器的能量沉积关系可以推断出束损点;不同入射角度不会影响生成粒子的能量分布,只轻微影响生成粒子的数目。
Accelerator-driven subcritical system C-ADS injector II uses a high-flow superconducting proton linear accelerator with a designed flow rate of 10 mA. The loss of beam due to the strong proton beam may damage the superconducting cavity and requires a dedicated beam loss monitoring system for monitoring. The beam loss detector (BLM) needs to provide an alarm before high energy deposition causes the superconducting chamber to be quenched. Through the MCNPX simulation, the radiation field generated by the loss of 10 Me V protons at different positions in the half-wave resonator (HWR) was calculated. Four locations at the entrance and exit of the superconducting cavity were chosen as the locations where the recommended beam loss detectors were placed. Combined with the HWR cavity structure And the influencing factors of beam loss detector selection, the energy deposition of secondary radiation in diamond detector and the effect of different proton incident angles from 1 ° to 5 ° on the detection were calculated. The results show that the beam loss can be inferred based on the energy deposition of detectors at different positions. The different incident angles will not affect the energy distribution of generated particles, and only slightly affect the number of generated particles.