Photoionization Of Hot Electrons Produced Pic/mcc Simulation Of Mechanism

Fast ignition is a kind of new inertial confinement fusion ignition pattern. The generation of the hot electrons is an important research area of fast ignition, and it is an important approach to numerically model the generation of the hot electrons in researching the physical phenomena of fast ignition.The interaction between the laser and plasma is included in the course of the generation of hot electrons. For a long time, the scholars at home and abroad have been appealing to research this interaction from various aspects, but they have been investing less time in researching the course of how the plasma was created by the interaction between the laser and the neutral substances. The course of creating electrons by laser is called laser field ionization. To understand the ionization of laser field can make us more comprehensive about the characteristics of laser on propagating through plasma. It will be a theoretical direction to practical application of modeling the course of laser field ionization correctly.This paper is based on both the theoretical analysis on the generation of hot electrons by field ionization and the relating computer assist modeling work. The main content is below: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 laser field 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. The PIC/MCC method is one combination of the Particle-In-Cell (PIC) method and the Monte-Carlo (MCC) method.2. The derivation of the particle-in-cell algorithms in the code LPIC++ 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. Also included in this derivation course are the transformation of coordinates and the procedure of getting dimensionless variables.3. The physical model of the laser field ionization is built up on the basis of the code LPIC++. The physical process of the laser field ionization, its analysis procedure, numerical modeling course and the flow chart for PIC/MCC are all studied.4. The numerical experiment based on the theoretical analysis of the laser field ionization is carried out. The module of PIC/MCC code in the shape of C++ is added into the code LPIC++.5. Vast quantity of data information is got by the numerical model of executing the laser field ionization PIC/MCC code. The procedure of forming plasma between the interaction of the laser and the neutral substances, the modulating course of the laser field ionization to the laser impulse, and the generating and growing process of laser wakefield are analyzed.