Abstract

The acceleration of charged particles over short distances by a modulated laser pulse has promising applications in the development of advanced technology in fields such as material diagnostics and medicine. Herein, a mechanism is proposed to accelerate charged particles using multifrequency modulated circularly polarized laser pulses directed along the propagation direction of a constant uniform magnetic field. An exact analytical solution is obtained for the equation of motion of a relativistic charged particle in a modulated multifrequency electromagnetic field, and its phase-matching condition is observed. Upon investigation of several cases of initial conditions for the motion of a charged particle, oscillatory motion is revealed in the field of a modulated electromagnetic wave, which depends on the parameters of the modulated electromagnetic wave, as well as the translational motion of the particle. The condition for cyclotron auto-resonance in the field of an intense laser pulse is evaluated. Results indicate that the cyclotron auto-resonance is satisfied for nonrelativistic intensities of the laser field. Finally, the average kinetic energy in the field of a plane laser pulse and that in the field of a one-dimensional Gaussian beam are compared, showing that the former does not differ from the latter for any range of laser field intensities.

中文翻译：

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相对论性带电粒子的调制激光诱导加速

摘要

调制激光脉冲在短距离内加速带电粒子在材料诊断和医学等领域的先进技术开发中具有广阔的应用前景。在此，提出了一种使用沿恒定均匀磁场的传播方向引导的多频调制圆偏振激光脉冲来加速带电粒子的机制。得到了调制多频电磁场中相对论性带电粒子运动方程的精确解析解，并观察了其相位匹配条件。通过研究带电粒子运动的初始条件的几种情况，在调制电磁波场中揭示了振荡运动，这取决于调制电磁波的参数以及粒子的平移运动。评估了强激光脉冲场中回旋加速器自谐振的条件。结果表明，对于激光场的非相对论强度，回旋加速器自谐振是满足的。最后，比较了平面激光脉冲场和一维高斯光束场的平均动能，表明在任何激光场强度范围内，前者与后者没有差异。