通过康普顿散射和电子-正电子对产生，实现激光光子的极化高效传播至正电子。

Efficient propagation of polarization from laser photons to positrons through compton scattering and electron-positron pair creation.

作者信息

Omori T, Fukuda M, Hirose T, Kurihara Y, Kuroda R, Nomura M, Ohashi A, Okugi T, Sakaue K, Saito T, Urakawa J, Washio M, Yamazaki I

机构信息

KEK: High Energy Accelerator Research Organization, Tsukuba-shi, Ibaraki 305-0801, Japan.

出版信息

Phys Rev Lett. 2006 Mar 24;96(11):114801. doi: 10.1103/PhysRevLett.96.114801.

DOI:10.1103/PhysRevLett.96.114801

PMID:16605830

Abstract

We have demonstrated for the first time the production of highly polarized short-pulse positrons with a finite energy spread in accordance with a new scheme that consists of two-quantum processes, such as inverse Compton scattering and electron-positron pair creation. Using a circularly polarized laser beam of 532 nm scattered off a high-quality, 1.28 GeV electron beam, we have obtained polarized positrons with an intensity of 2 x 10(4) e+ /bunch. The magnitude of positron polarization has been determined to be 73 +/- 15(stat) +/- 19(syst)% by means of a newly designed positron polarimeter.

摘要

我们首次展示了根据一种由逆康普顿散射和电子 - 正电子对产生等双量子过程组成的新方案，产生具有有限能量展宽的高极化短脉冲正电子。使用从高质量的1.28 GeV电子束散射的532 nm圆偏振激光束，我们获得了强度为2×10⁴ e⁺/束的极化正电子。通过新设计的正电子偏振仪，已确定正电子极化幅度为73±15（统计）±19（系统）%。