极化与非极化正电子产生的特性与优化
Characterization and optimization of polarized and unpolarized positron production
AI总结:
本文研究了电子诱导正电子产生的多参数优化问题,针对120~MeV和1000~MeV电子束动能及钨靶,揭示了最佳靶厚度与收集系统角接受度间的强相关性,以及极化与非极化运行模式间的显著差异。
摘要:
电子诱导的正电子产生是一个多参数问题,结合了基础物理过程与复杂的收集系统。本文讨论了在考虑钨靶的情况下,针对120~MeV和1000~MeV电子束动能对该技术的优化。观察到最佳靶厚度与收集系统的角接受度($Δθ$)之间存在强相关性,并且在最佳非极化与极化运行模式之间也存在显著差异。这些差异还延伸至最佳状态下的正电子动量与正电子极化,以及高能电子束对高占空比正电子源的益处。
英文摘要:
The electron induced production of positrons is a multi-parameter problem which combines elementary physics processes with complex collection systems. The optimization of this technique for 120~MeV and 1000~MeV electron beam kinetic energies is here discussed considering a tungsten target. A strong correlation between the optimum target thickness and the angular acceptance ($Δθ$) of the collection system is observed, as well as sizeable differences between the optimum unpolarized and polarized operational modes. These also extend to the positron momentum and the positron polarization at the optimum, as well as the benefit of high electron beam energies for a high duty cycle positron source.
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