ABSTRACT

 In this thesis one of the most promising plasma based particle acceleration methods, the Laser Wakefield Acceleration (LWFA) mechanism is discussed in detail. Starting from the standard LWFA method, the wakefield generation in plasmas and the energy gain of electrons are formulated.
 The wakefield generation by a multi passage laser beam in a plasma model based on the resonant LWFA is proposed. The growth on the wakefield amplitude is demonstrated and the corresponding energy gain of electrons are calculated. In addition to that, the LWFA under the effect of a constant magnetic field in a plasma is taken into consideration and the beneficial effect of the magnetic field on charged particle acceleration is demonstrated. The magnetic field generation in a laser irradiated plasma problem is considered in detail and the physical mechanism of the induced magnetic field is presented. Furthermore, different than all these models the electron acceleration under the effect of the induced magnetic field is taken into account and a complete theoretical formulation for the wakefield and energy gain for this case is provided. Finally, the original models of weakly magnetized and self-magnetized LWFA are suggested to replace future’s conventional high-energy accelerators

Keywords: plasma based particle accelerators, Laser Wakefield Acceleration, magnetic field generation in plasmas, magnetized Laser Wakefield Acceleration, self-magnetized Laser Wakefield Acceleration.