超相对论正电子的单程激光偏振
Single-Pass Lazer Polarization of Ultrarelativistic Positrons
摘要：
提出了产生极化相对论正电子的新方法。一束被加速到几个GeV的非极化正电子可以在与强烈的圆极化激光波正面碰撞时被极化。在多次康普顿背散射过程之后，初始正电子可能会损失其能量的相当大的一部分，并且因此可能获得显著的纵向极化。得到了正电子终态能量和极化度随闪光参数变化的简单公式。并将该方法与已知方法的效率进行了比较。结果表明，该方法具有一定的优越性。
英文摘要：
The new method for producing of the polarized relativistic positrons is suggested. A beam of unpolarized positrons accelerated up to a few GeV can be polarized during a head-on collision with an intense circularly polarized lazer wave. After a multiple Compton backscattering process the initial positrons may lose a substantial part of its energy and, as consequence, may acquire the significant longitudinal polarization. The simple formulas for the final positron energy and polarization degree depended on the laser flash parameters have been obtained. The comparison of efficiences for the suggested technique and known ones is carried out. Some advantages of the new method were shown.
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