CSRm内靶实验中的轻离子束流寿命模拟研究
Monte-Carlo simulation of lifetime of light ion beams in CSRm for internal target experiments
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摘要: 建立了内靶对兰州冷却储存环主环束流影响的单粒子跟踪模拟程序，对pellet小丸靶和碳靶对束流带来的负面影响进行了模拟研究，主要讨论CSRm内靶实验中的束流存活率和束流寿命状态。结果显示利用厚度为1×1016 atoms×cm-2小丸内靶时，2.6 GeV质子束流寿命在100 s量级，而对于目前技术水平下的碳膜靶 (厚度为 5×1017 atoms×cm-2)，质子束流寿命为s量级；束流寿命和束流能量基本成正比关系，束流寿命和内靶厚度近似成反比关系。Abstract: A Monte-Carlo simulation was done to study the influence of the internal pellet and carbon foil target to the beam in the CSRm without electron cooling. The results show that the beam loss is mainly due to the growth of beam emittance caused by the small angle Coulomb scattering in the target, and lifetime of the beam is proportional to the beam energy and inverse proportional to the target thickness. For 2.6 GeV proton beam, lifetime in the CSRm is about 100 s with pellet target(1×1016 atoms×cm-2) and will drop to 1 s with carbon foil target(5×1017 atoms×cm-2).
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Key words:
- beam lifetime /
- csrm /
- internal target /
- emittance /
- acceptance /
- monte-carlo simulation
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