论文标题
基于解散器的ILC正电子源的更新状态
Updated status of the undulator-based ILC positron source
论文作者
论文摘要
国际线性对撞机（ILC）的正电子源的设计仍在讨论中。基线设计计划将高能电子光束用于正电子光束在IP之前的生产。电子通过一个长的螺旋悬管，并产生一个强烈的圆形光子光束，该光束击中薄的转换目标以产生$ e^+e^ - $ pairs。所得的正电子束是纵向极化的，这为ILC的精确物理分析提供了重要的好处。在本文中，提出了正电子目标设计研究的状态。焦点是250 GEV和Z峰的质量中心能量的正电子产率。讨论了改善正电子收集系统并增加正电子产量的可能性。
The design of the positron source for the International Linear Collider (ILC) is still under discussion. The baseline design plans to use the high-energy electron beam for the positron production before it goes to the IP. The electrons pass a long helical undulator and generate an intense circularly polarized photon beam which hits a thin conversion target to produce $e^+e^-$ pairs. The resulting positron beam is longitudinally polarized which provides an important benefit for precision physics analyses at the ILC. In this paper the status of the positron target design studies is presented. Focus is the positron yield for center-of-mass energies of 250 GeV and also the Z peak. Possibilities to improve the positron collection system and thus to increase the positron yield are discussed.
