Design And Particle Simulation Of Planar MILO

A new type of magnetically insulated transmission line oscillator (MILO)--Planar MILO is put forward to solve the low frequency and low efficiency of MILO. The new device can be spread along the X direction of the plane and it is also a microwave tube with low impedance and high power. Planar MILO has used a low external magnetic field to take the place of magnetic insulation magnetic field so that we can enhance the efficiency of the microwave output. Through numerical calculation, the impacts of several structure parameters of Planar MILO coaxial SWS(plane wrinkle surface) on its high frequency characteristic are analyzed. Then the external magnetic is further optimized with 2.5 dimensional particle-in-cell simulation. At the same time, the paper also discusses the problems that may be faced in the future and the methods to be solved. The central contents and innovational work are as follows:Firstly, the investigation of the background of HPM technology and the present development of MILO are introduced and the principle and research methods of MILO are pointed out. Then, the academic value of Planar MILO is explained.Secondly, in the study of the research methods and the mechanism of conventional MILO, this dissertation finds that when MILO works at high frequency the efficiency is low.Thirdly, we design a new type of MILO-Planar MILO. The model of planar MILO is the plane of MILO's device structure. Compared with common MILOs, the planar MILO has a rectangular structure whose cavity is enlarged to avoid the breakdown between cathode and anode.So the planar MILO is suitable for working at high frequencies. Planar MILO has used an external magnetic field to take the place of magnetic insulation magnetic field which could improve the efficiency of the microwave output.At last, the external magnetic is further optimized with 2.5 dimensional particle-in-cell simulation. High power microwave is generated from the planar MILO with the average output power of 1.22 GW, central frequency of 6.56 GHz and efficiency of 30%, when the beam voltage is 800kV.