Description
Xinlu Xu received his B.Sc. in engineering physics from Tsinghua University, China in 2008. He obtained his Ph.D. in nuclear science and technology from Department of Engineering Physics, Tsinghua University in Jan. 2015. His major research project in Prof. Wei Lu’s group is phase space dynamics in plasma based wakefield acceleration. Subsequently, he became a post-doc fellow working with Prof. Warren B. Mori at Physics and Astronomy Department, University of California, Los Angeles, focusing on the generation, transportation of high quality electrons from plasma based wakefield accelerators and the development of high-fidelity particle-in-cell codes. Now he is working at SLAC National Accelerator Laboratory as a staff scientist to pursing high quality high energy acceleration in plasmas and study various interactions between intense beam, laser and plasmas. Chapter 1 Introduction 1.1 Introduction 1.2 Plasma Based Acceleration 1.3 Particle-in-Cell Simulations 1.4 Motivation and Outline Chapter 2 Phase Space Dynamics of Injected Electron Beams in Ionization Injection 2.1 Introduction 2.2 The Photoionization Process 2.3 The Residual Momentum 2.3.1 Initial Momentum from the Tunneling Ionization 2.3.2 The Momentum from the Lasers: Longitudinal Injection 2.3.3 The Momentum from the Lasers: Transverse Injection 2.3.4 The Thermal Emittance 2.4 Single Particle Motion in the Nonlinear Wake 2.5 Transverse Phase Mixing 2.5.1 Emittance Evolution: Growth and Oscillation in the Injection Stage 2.5.2 Emittance Evolution: Decrease and Regrowth in the Acceleration Stage 2.5.3 A Phenomenological Model 2.5.4 Comparisons with PIC Simulations 2.6 Longitudinal Phase Mixing 2.6.1 The Trapping Condition 2.6.2 Longitudinal Phase Mixing 2.7 Space Charge Effects 2.8 The Two-Color Ionization Injection 2.8.1 The Emittance in A Single Laser Case 2.8.2 The Two-Color Ionization Injection: Longitudinal Injection 2.8.3 The Two-Color Ionization Injection: Transverse Injection 2.9 Intrinsic Phase Space Discretization in Laser Triggered Ionization Injection 2.9.1 Single Laser Pulse Case 2.9.2 Beam Driver with a Laser Injector 2.10 Summary
