Electron Beam Transport in Advanced Plasma Wave Accelerators

Williams, Ronald L

关键词: plasma wave accelerators;    diagnostic;    low energy electron beam;    beat-wave;    trajectory;    phase space;    numerical simulation;   

DOI  :  10.2172/1061446
RP-ID  :  DOE/ER/40998
PID  :  OSTI ID: 1061446

学科分类：核物理和高能物理

美国|英语

来源: SciTech Connect

【 摘 要 】

The primary goal of this grant was to develop a diagnostic for relativistic plasma wave accelerators based on injecting a low energy electron beam (5-50keV) perpendicular to the plasma wave and observing the distortion of the electron beam's cross section due to the plasma wave's electrostatic fields. The amount of distortion would be proportional to the plasma wave amplitude, and is the basis for the diagnostic. The beat-wave scheme for producing plasma waves, using two CO2 laser beam, was modeled using a leap-frog integration scheme to solve the equations of motion. Single electron trajectories and corresponding phase space diagrams were generated in order to study and understand the details of the interaction dynamics. The electron beam was simulated by combining thousands of single electrons, whose initial positions and momenta were selected by random number generators. The model was extended by including the interactions of the electrons with the CO2 laser fields of the beat wave, superimposed with the plasma wave fields. The results of the model were used to guide the design and construction of a small laboratory experiment that may be used to test the diagnostic idea.