Three-dimensional Numerical Simulation Of Linear Induction Acelerator Injector

Since the birth of the first accelerator from the sixty’s of the last century, the accelerator has experienced decades of continuous development and many countries have developed more and more powerful accelerators, and it has been widely used in military and civil fields. At the same time it has created enormous economic benefits. Of course, those who have successfully developed countries are foreign blockade on these technologies, this objectively requires us to rely on ourselves to research and development of related technology of our own. In the process of accelerator, numerical simulation technology is an indispensable, its application has solved with many equations of mathematical physics cannot obtain the analytical solution of the problem, and the computing relevant results are given for personnel to research and analyze. In the rapid development of the computer, the computer’s computing power is more and more strong, this provides a powerful technique calculated on the basis of numerical simulation. The development of electromagnetism technology provides the theoretical support to the numerical simulation, the combination of technology, which makes the application of numerical simulation to analysis of some come physical system is possible.As the electron source device of the accelerator, the research on injector in the countries all over the world has never stopped. This paper is in the use of University of Electronic Science and Technology of China with independent proprietary rights of CHIPIC software in simulating related to the relevant physical problems of the injector, the main contents are as follows:1. According to the experimental structure gives the related date, establish the injector mode, Then adding the reasonable voltage, so that the electric field distribution can satisfy the electron acceleration requirement. According to the data of each solenoid coil to the numerical experiments, numerical value and experimental magnetic field eventually introduced to keep consistent. The final statistics calculated normalized of the electron beam, the results of the simulation coincided well with the experimental results given by the relevant literature.2. After the calculation of key parameters of the injector and achieveing expected results, summarize the change regularity of different position of the beam emittance in the magnetic field. Then it studies the shimming ring attenuation’s effects on the solenoid coil, and under both the two conditions of in the absence of shimming ring and shimming ring the electron beam current results while move in a magnetic field and then give the related problems and analysis. These main problems are the change of electron beam envelope transmission movement in the process of moving, the changes of emittance statistical phase space contours and normalized emittance values. The results shows, in the case of shimming ring electron beam with these parameters are improved obviously, the normalized emission of electron beam reduce from 1050 mm.mrad to 640 mm.mrad, optimized by 39%.3. At the last, based on the comparison of the central difference method and partial algorithm on the calculation result, it analyzes the improvement the partial algorithm; the final statistics in effect by only change the distance between anode and cathode on the electron beam, and the statistical results are presented in the form of tables.