Super Hot Electrons Generated In The Process Of Electron Impact Ionization Of Computer Simulation

People can get clean energy through inertial confinement fusion, which is one of the important ways to solve the energy crisis and environmental trouble. At present, there is three ways to achieve the ignition of inertial confinement fusion:body ignition, fast ignition and center ignition. Fast ignition reducing the drive energy and the hydrodynamic instability has become the focus of research. The laser-plasma interaction generated hot electrons, and hot electrons generated is an important area of fast ignition research.Theoretical simulation studies on hot electrons generated methods mainly using particle-in-cell, and most of the simulation of laser plasma interaction process without considering the process of neutral particles ionized into plasma. Electron collision ionization is the main ionization mechanism in the process of neutral particles ionization into the plasma. Understanding the ionization of electron collision can make us more comprehensive about laser absorbed by the plasma and the characteristics of laser on propagating through plasma. It will be a theoretical direction to practical application of modeling the course of electron collision ionization correctly.The main content of this paper:1. The work on the summarizing, concluding and comparison of numerical modeling methods about the generation of hot electrons is presented. Both the extraordinary importance of numerical modeling the course of the electron collisional ionization and the advantage of PIC/MCC method over the others’in the area of plasma physics of the laser field ionization are also included.2. Summed up the hot electron generation and transport theory, and analyzed field ionization, electron collision ionization and binary coulomb collisions.3. The derivation of the particle-in-cell algorithms in hot electron generation and transport is presented, and among which the solution of electromagnetic field, the solution of dynamical equations and the solutions of charge and current density equations are included.4. The electron collisional ionization model is established, and combined with Monte Carlo analysis electron impact ionization process, drawing a flow chart.5. The module of electron collisional ionization is added into the code LPIC, and got electronic collision characteristics by computer numerical computing. Contrast of laser incidence and oblique incidence of ionized particle density influence on the field and plasma burning boring effect. Compare electron collisional ionization between laser normal incidence and oblique incidence. Analyzed the influence of particle density for electron impact ionization and studied plasma hole burning...