Production of Highly Polarized Positrons Using Polarized Electrons at MeV Energies.
Production of Highly Polarized Positrons Using Polarized Electrons at MeV Energies.
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DOI：
10.1103/physrevlett.116.214801
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发表时间：
2016-05
影响因子：
8.6
通讯作者：
D. Abbott;P. Adderley;A. Adeyemi;P. Aguilera;M. Ali;H. Areti;M. Baylac;J. Benesch;G. Bosson-G.-Bo
中科院分区：
文献类型：
--
作者：
D. Abbott;P. Adderley;A. Adeyemi;P. Aguilera;M. Ali;H. Areti;M. Baylac;J. Benesch;G. Bosson-G.-Bo
在连续电子束加速器装置的注入器上进行了极化电子对极化正电子的实验，首次证明了在高z目标中由极化电子束诱导的极化轫致辐射所产生的极化从电子到正电子的有效转移。当初始电子束动量为8.19 MeV/c时，仅受电子束极化的限制，正电子极化率高达82%。该技术将极化正电子的能力从GeV电子束扩展到MeV电子束，并为广泛的社区打开了极化正电子束物理学的大门。
The Polarized Electrons for Polarized Positrons experiment at the injector of the Continuous Electron Beam Accelerator Facility has demonstrated for the first time the efficient transfer of polarization from electrons to positrons produced by the polarized bremsstrahlung radiation induced by a polarized electron beam in a high-Z target. Positron polarization up to 82% have been measured for an initial electron beam momentum of 8.19 MeV/c, limited only by the electron beam polarization. This technique extends polarized positron capabilities from GeV to MeV electron beams, and opens access to polarized positron beam physics to a wide community.