论文标题
ISODAR 60 MEV/AMU CYCLOTRON加速模拟的更新
Update on the IsoDAR 60 MeV/amu Cyclotron Acceleration Simulations
论文作者
论文摘要
在这份技术报告中，总结了DAE $δ$ alus合作成员在ISODAR紧凑型等距回旋子中模拟5 MA的加速度的工作。研究结果表明，（n-1）第（N-1）和第n个转弯之间的足够转弯可以通过最初匹配的两转，也可以通过仔细放置准直仪来刮掉光环颗粒，然后在梁能量达到2 MEV/AMU之前就可以刮掉光环颗粒。在这里，我们将“足够”定义为隔膜上的<200 W光束损失。在加速模拟中，准直晶石器上的光束损失从10％到25％，具体取决于初始梁条件。讨论了在最后一圈的中央区域，光环形成和转弯分离的准直仪位置。最后，研究了一种通过在其前面放置狭窄的剥离箔来进一步减轻提取隔膜上梁损失风险的方案。我们还提出了一项单独的研究的发现，分包给了AIMA公司，AIMA通过螺旋膨胀器调查了H2+离子的注射，并将其加速四回合。在这里，据报道，2 MeV/AMU之前的梁损失为58％，但束并未进一步加速，因此我们没有将其报告为最终结果。
In this technical report, the work done by members of the DAE$δ$ALUS collaboration on simulating the acceleration of 5 mA of H2+ in the IsoDAR compact isochronous cyclotron is summarized. The findings are that sufficient turn separation between the (N-1)th and Nth turn can be achieved with either initially matched but also with mismatched beams by careful placement of collimators to scrape away halo particles before the beam energy has reached 2 MeV/amu. Here we define "sufficient" as < 200 W beam loss on the septum. In the acceleration simulations, beam losses on the collimators vary from 10% to 25% depending on the initial beam conditions. The collimator placement in the central region, halo formation, and turn separation at the final turn are discussed. Finally, a scheme to further mitigate the risk of beam loss on the extraction septum by placing a narrow stripping foil in front of it is investigated. We also present the findings of a separate study subcontracted to the company AIMA, who investigated injection of H2+ ions through a spiral inflector and accelerating them for four turns. Here the reported beam loss before 2 MeV/amu was 58%, but bunches were not accelerated further, so we are not reporting this as a final result.
