Design of a polarized positron source for linear colliders
Design of a polarized positron source for linear colliders
复制标题
线性对撞机偏振正电子源的设计
DOI：
10.1016/s0168-9002(02)01985-x
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发表时间：
2003
影响因子：
1.4
通讯作者：
K. Yokoya
中科院分区：
文献类型：
--
作者：
T. Omori;T. Aoki;K. Dobashi;T. Hirose;Y. Kurihara;T. Okugi;I. Sakai;A. Tsunemi;J. Urakawa;M. Washio;K. Yokoya
提出了一种用于直线对撞机的极化正电子源的设计方案。该设计是基于电子-正电子对的创建从偏振γ射线产生的康普顿散射的圆偏振激光的高能电子束。极化正电子是由入射到薄转换靶上的γ射线产生的。未来的TeV能区直线对撞机需要非常大量的正电子（101 × 1010个正电子/束团），并且是多束团时间结构。为了满足这些要求，我们的设计采用了5.8 GeV的高电流，低发射率的电子束，10 CO2激光器，和200激光电子碰撞点。在每个碰撞点，安装了一对特别设计的抛物面镜，以实现高效的正面碰撞。这个系统使我们能够产生高强度的极化γ射线，它有效地产生高强度的极化正电子，其极化幅度大于50%。
We propose a design of a polarized positron source for linear colliders. The design is based on electron–positron pair creation from polarized γ-rays which are produced by Compton scattering of circularly polarized laser light off a high-energy electron beam. Polarized positrons are created from those γ-rays incident on a thin conversion target. A future linear collider of the TeV-energy region requires an extraordinary large number of positrons (∼1×1010positrons/bunch) in a multi-bunch time structure. To meet these requirements, our design employs a high-current, low-emittance electron beam of 5.8 GeV , 10 CO2lasers, and 200 laser–electron collision-points. At each collision point, a pair of specially designed parabolic mirrors is installed to achieve efficient head-on collisions. This system allows us to produce high-intensity polarized γ-rays, which effectively generate high-intensity polarized positrons with the magnitude of polarization greater than 50%.