Theoretical Studies Of Laser Acceleration

With the rapid development of ultra-intense laser technologies, for more than a decade there has been much interest in studying the interaction of ultraintense laser with matter. Laser acceleration of charged particles has been one of these frontier research subjects.In is thesis, it has been found that for a focused laser beam propagating in free space, there exists, surrounding the laser beam axis, a subluminous wave phase velocity region. Relativistic electrons injected into this region can be trapped in the acceleration phase and remain in phase with the laser field for sufficiently long times, thereby receiving considerable energy from the field. In addition, the correlation between the outgoing energy and the scattering angle of electrons accelerated by a laser beam in vacuum has been investigated. It is found that electrons with the same outgoing energy will have an angular spread. The result of the simulation is to be consistent with the theoretical calculation. Laser acceleration of an electron with applied magnetic field was studied. The effects of the angle of the extend field on the electron acceleration was investigated. The electron attains the maximum amount of energy at a particular angle of the obliquely magnetic field.