Simulation of gas breakdown process of field-reserved configuration using PIC/MC models

The HUST Field-Reversed Configuration (HFRC) is able to form a Field-Reversed Configuration (FRC) plasma by the theta-pinch method, and improve the FRC parameters formed by the collision fusion process. The pre-ionization phase is a pivotal stage in FRC formation, and the characteristics of FRC plasma depend largely on the specific conditions of gas breakdown in the pre-ionization stage. The breakdown process of plasma undergoes a short time, the parameter change amplitude is very large, and the breakdown process data obtained by experimental measurement is very limited, so it is important to use numerical simulation method to adjust the controllable parameters of the discharge process to study the parameter evolution of plasma under different discharge conditions. Based on the structural characteristics and operating parameters of the HFRC platform, particle models and Monte Carlo will be used to calculate the gas breakdown process in the pre-ionization stage, showing the evolution of parameters during the breakdown process, and comparing and analyzing with the experimental data measured in the HFRC formation region to study the initial bias magnetic field, pre-ionized magnetic field, It is hoped that the influence of induced electric field and gas-charged air pressure on the plasma behavior during breakdown can improve the captured magnetic flux under the condition of sufficient ionization of the gas, and improve the characteristics of FRC plasma formed in subsequent experiments to a certain extent.