Study Of Plasma Optical Mass Separator Based On PIC Simulation

Plasma optical mass separator is one of the important applications in the area ofelectromagnetical controll of charged particle beams. Azimuthator and separationregion are the major components of POMS and the key components ofelectromagnetical controll of plasma beam, its designparameter affects theefficiency of separation directly. The simulation of motion behavior of plasma beamis the major content of POMS study. At present,the study of POMS still remain inthe stage of single-particle theory which can’t represent the distributioncharacteristics and motion of electrons and ignores the overall characteristics of theplasma. Its research program on the motion of particle is not complete and accurate.Based on the single-particle theory in this paper, we give the motion states of plasmabeam through the method of PIC more completely and accurately.Firstly, we the propose a new method of POMS study-particle in cell(PIC),describe the design of its important processes, such as the solution of electrostaticfield poisson equation and the format of particle motion, and further validate theaccuracy of the PIC model. Illustrate the feasibility of study in the physicalproblems, and provide a strong theoretical basis to the corresponding simulationmodel.Secondly, bulid the azimuthator model according to the PIC theory. Analysisthe motion state of plasma beam in the azimuthator, particle density, andself-consistent Efield distribution in the azimuthator. Meanwhile, the impact ofdivergence angle of beam to the motion of plasma which in the azimuthator is alsostudied. Through the simulation results of distribution of particle density andself-consistent Efield, we can find the problems of existing azimuthator which candecrease the separation efficiency, and then improve the strcture of azimuthator toslove it.Through the PIC simulation, it proves that the improved azimuthator has theeffects of increasing the separation efficiency and plasma density.Thirdly, bulid the separation region model according to the PIC theory. Thoughthe analysis of the simulation results, it researches the differences between the sameplasma beam in different center mass. According to the analysis of gathering radius,mass dispersion, circumference position of gathering and so on with examples of theisotope lithium and aranium, we design corresponding parameters of the separationregion, and confirm the theory of it.Finally, considering the working effects of POMS from the practical andintegral viewpoints, we bulid an overall PIC simulation model. Based on the modelin a separete with examples of the isotope and mixed gas ions, it researches the motion and separation situation of the plasma beam with a divergence angle in theentire device. Then the paper gives constructive suggestions to design the wholedevice and improve the separation efficiency which provide a theoretical basis to thedesign of POMS.