论文标题
在强场中相对论粒子梁（DE-）极化时间的缩放定律
Scaling laws for the (de-)polarization time of relativistic particle beams in strong fields
论文作者
论文摘要
在强激光和等离子体场中极化电子和质子的加速度是在GEV范围内获得极化束的非常有吸引力的选择。我们研究了可能导致极化损失的所有相关机制，即由T-BMT方程所描述的自旋进液，Sokolov-ternov效应和船尾 - gerlach力，我们研究了强场中粒子加速度的可行性。这些效应引起的（DE-）极化时间的缩放定律表明，主要的极化限制效应是围绕局部电磁场的单个粒子旋转的旋转。我们将我们的发现与测试粒子模拟在均匀电场中移动的高能电子的测试片段模拟。对于高粒子能，观察到的去极化时间与分析估计的时间符合。
The acceleration of polarized electrons and protons in strong laser and plasma fields is a very attractive option to obtain polarized beams in the GeV range. We investigate the feasibility of particle acceleration in strong fields without destroying an initial polarization, taking into account all relevant mechanisms that could cause polarization losses, i.e. the spin precession described by the T-BMT equation, the Sokolov-Ternov effect and the Stern-Gerlach force. Scaling laws for the (de-)polarization time caused by these effects reveal that the dominant polarization limiting effect is the rotation of the single particle spins around the local electromagnetic fields. We compare our findings to test-particle simulations for high energetic electrons moving in a homogeneous electric field. For high particle energies the observed depolarization times are in good agreement with the analytically estimated ones.
