電磁波による電子の加速

抄録

It is found that an electron can be efficiently accelerated by a simple system which is composed of a plus plane electromagnetic (EM) wave and a astatic magnetic field. In this system the direction of the magnetic component of the EM wave is pa rallel to that of the static fields. Initialy an electron is positioned in front of the pluse plane EM wave and the electron speed is less than the speed of light(c). The pulse plane EM wave travels across the static magnetic field with the speed of fight(c). Therefore, the pluse EM wave catches up with the electron and leaves it behind. Without the static magnetic field in the system, the electron would not be able to absorb the wave energy because of the symmetry of the EM wave. However, because the static magnetic field breaks the symmetry of the EM wave in the system, the electron can absorb the wave energy and be efficently accelerated in the direction of the electic component of the of the EM wave. We have obtained the optimal magnitude for the static magnetic field and the final γ by a simple analysis.
The single particle analyses and the simulations also show that this system ones well for a high-energy electron acceleration and the simulation results agree with the analytical results.