标题： 激光簇在外部磁场中的相互作用：激光偏振的影响 显示英文标题

标题： Laser-cluster interaction in an external magnetic field: the effect of laser polarization

摘要： 通过在环境磁场中的激光-团簇相互作用，电子通过无碰撞吸收激光能量（$B_0$）最近引起了新的兴趣。由于吸收水平很高。之前，使用刚性球模型（RSM）和线偏振（LP）激光光的大量粒子模拟，我们已经表明，一个横向于激光偏振方向的辅助场$B_0$显著增强了激光吸收 [Scientific Reports{\bf 12}, 11256 (2022)]。在这种LP情况下，电子的平均能量（$\mathcal{E}_A$）接近其辐射压力能（$U_p$）的$30-70$倍。通过非谐波共振（AHR）然后是电子回旋共振（ECR），集群电子的两阶段激光吸收被归因于同时满足改进的相位匹配和频率匹配条件。再次，我们报告了这些高能电子束的狭窄圆锥状传播，作为具有弱相对论电子束的角扩散$\Delta\theta<5^{\circ}$。此外，我们强调了更大团簇尺寸对这些电子的能量和角扩散的影响。 在本工作中，我们研究了圆偏振（CP）激光场对簇-电子动力学的影响，考虑了环境中的左/右圆偏振和$B_0$。, 能量分布，和.. 显示英文摘要

摘要： Collisionless absorption of laser energy by an electron via laser-cluster interaction in an ambient magnetic field ($B_0$) has recently renewed interest. %due to high levels of absorption. Previously, using a rigid sphere model (RSM) and an extensive particle-in-cell (PIC) simulation with linearly polarized (LP) laser light, we have shown that an auxiliary field $B_0$ in a transverse direction to the laser polarization significantly enhances the laser absorption [Scientific Reports {\bf 12}, 11256 (2022)]. In this LP case, the average energy ($\mathcal{E}_A$) of an electron rises near $30-70$ times of its ponderomotive energy ($U_p$). The two-stage laser absorption by cluster electrons has been attributed via anharmonic resonance (AHR) followed by electron-cyclotron resonance (ECR) satisfying the improved phase-matching and frequency-matching conditions simultaneously. %Again, we report the narrow cone-like propagation of these %energetic electron bunches as a weakly relativistic electron beam with an %angular spread $\Delta\theta<5^{\circ}$. %Also, we highlight the effect of bigger cluster sizes on the energy and %angular spread of these electrons. In the present work, we study the effect of circularly polarized (CP) laser fields on the cluster-electron dynamics considering left/right circular polarizations with an ambient $B_0$. %, energy distribution, and..