Numerical Simulation Of Magnetic Insulation Coaxial Transmission Line

As foreign and domestic high power pulse technology development, a variety of the pulse power devices have been established. In the pulse power device, magnetic transmission line, which is the important transmission equipment, is the key technology of high power pulse transmission. In this paper, CHIPIC software, which has been verified, was used to simulate and research the coaxial magnetic insulation transmission line, for the corresponding guidance of design of the experiments.First of all, using advanced foreign particles software and CHIPIC software, which is self-developed by China, to set the same model of the non-uniform coaxial magnetic insulation transmission line respectively, setting the same conditions parameters and the same observation position of current, voltage, power, and so on. Comparing with the simulation results of the two different softwares, to verify the feasibility of CHIPIC software simulating the coaxial magnetic insulation transmission line.Then, it is combining the methods of Relativistic Brillouin Flow theoretical analysis and numerical simulation to select the appropriate load impedance value of the diode. The coaxial magnetic insulation transmission lines with appropriate load has been simulated, and analyzing the change situation and the loss reasons of the transmission current、voltage、power and so on. Simulating the coaxial magnetic insulation transmission line about different size of the cathode deviating, to get the deviating size impact the current, voltage transmission, and so on.Finally, according to the design requirements of the coaxial magnetic insulation transmission line to select the appropriate size of the helical inductor. Both considering time-consuming and simulation calculation accuracy, to select the suitable grid size of2.5mm.(1) The coaxial magnetic insulation transmission line with helical inductor, which agree with the experiment size, has been numerical simulated. Cold cavity simulation: helical inductor cause the cathode current and anode current loss rate of0.9%respectively. Heat cavity simulation:the anode current loss rate is4.4%, cathode current loss rate is8.9%, and the total current loss rate of the magnetic insulation transmission line after the helical inductor is1.3%.(2) The coaxial MITL with helical inductor has been exploratively improved, and numerical simulation researched, the transmission efficiency of current has been improved, and the part of electronic current loss has been restrain, the anode current loss rate reduce to0.5%, cathode current loss rate decline to1%, and the total current loss rate of the magnetic insulation transmission line after the helical inductor drop down to0.5%.(3) The above improved coaxial MITL with helical inductor, which launches electrons, has been numerical simulated, the anode current loss rate increase to6%, cathode current loss rate increased to8.6%, and the total current loss rate of the magnetic insulation transmission line after the helical inductor is1%approximately.(4) The above improved coaxial MITL with helical inductor, which launches electrons, has been numerical parallel computed, the relationship between time-consuming and the number of computers has been discussed, the conclusion that: parallel computing speed up the computing speed, and the consuming time cut from5148.5hours by one computer to58.1hours by six computers.(5) The above improved coaxial MITL with helical inductor has been taken experimental tested, the experimental results and the particle simulation results have been researched and analyzed.