Wakefield Acceleration in Relativistic Shock Waves

用粒子模拟的方法研究了相对论激波中产生的大振幅波作用下的尾波场加速度。已知在激波锋面上由同步脉泽不稳定性产生的大幅度前驱波可以向上游传播。我们通过有质动力研究了前驱波与等离子体的相互作用。尾波场加速被认为是激光等离子体中粒子加速器的新一代方案，而在天体等离子体环境中，前驱波的性质变得或多或少是湍流的，我们需要了解非相干场下的尾波场加速。通过大尺度的粒子模拟发现，非相干激波上游波作用下的尾波场加速可以看作是一种高效的加速机制。

We studied wakefield acceleration under large amplitude waves generated in a relativistic shock wave by using a particle-in-cell simulation. It is known that the large-amplitude precursor wave generated by synchrotron maser instability at the shock front can propagate toward the upstream region. We investigated the interaction between the precursor wave and plasmas through ponderomotive force. The wakefield acceleration is known to be a new generation scheme for particle accelerator in laser-laboratory plasma, while in the astroplasma settings, the nature of the precursor wave become more or less turbulent, and we need to understand the wakefield acceleration under incoherent fields. We found that the wakefield acceleration under the incoherent shock upstream waves can be regarded as a high efficient acceleration mechanism by a large-scale, particle-in-cell simulation.