Wakefield Acceleration in Relativistic Shock Waves

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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.