Particle Acceleration Due to Electrostatic Shock Wave Driven by Counterstreaming Pair Plasmas

By using particle-in-cell code, we investigated the particle acceleration due to electrostatic shock wave driven by counterstreaming instability in pair plasma with background magnetic field parallel to the direction of counterstreaming. We found the high-energy particle acceleration due to the electrostatic field parallel to the background magnetic field. The generation of electromagnetic fluctuations is restrained by strong background magnetic field, and consequently the electrostatic mode becomes dominat. Then, high-energy particles are produced from electrostatic field. This acceleration is more effective than the condition without background magnetic field.