Investigation on current loss of high-power vacuum transmission lines with coaxial-disk transitions by particle-in-cell simulations

作     者：Wei LUO Jianwei ZHANG Yongdong LI Hongguang WANG Chunliang LIU Pengfei ZHANG Fan GUO 罗伟;张建威;李永东;王洪广;刘纯亮;张鹏飞;郭帆

作者机构：Department of Applied PhysicsXi’an University of TechnologyXi’an 710048People's Republic of China Key Laboratory for Physical Electronics and Devices of the Ministry of EducationSchool of Electronic Science and EngineeringXi'an Jiaotong UniversityXi’an 710049People's Republic of China State Key Laboratory of Intense Pulsed Radiation Simulation and EffectNorthwest Institute of Nuclear TechnologyXi'an 710024People's Republic of China Institute of Fluid PhysicsChina Academy of Engineering PhysicsMianyang 621900People's Republic of China 

出 版 物：《Plasma Science and Technology》 (等离子体科学和技术（英文版）)

年 卷 期：2021年第23卷第11期

页      面：177-184页

核心收录：

学科分类：08[工学] 082701[工学-核能科学与工程] 0827[工学-核科学与技术] 

基　　金：supported by National Natural Science Foundation of China(Nos.U1530133 and 52007152) the Special Foundation of State Key Laboratory of Intense Pulsed Radiation Simulation and Effect(No.SKLIPR2005) the Youth Innovation Team of Shaanxi Universities 

主　　题：magnetically insulated transmission line coaxial-disk transition current loss 

摘      要：Coaxial-disk transitions can generate non-uniform magnetic fields and abrupt impedance variations in magnetically insulated transmission lines(MITLs),resulting in disturbed electron flow and non-negligible current *** this paper,3 D particle-in-cell simulations are conducted with UNPIC-3 d to investigate the current loss mechanism and the influence of the input parameters of the coaxial-disk transition on current loss in an MITL *** results reveal that the magnetic field non-uniformity causes major current loss in the MITL after the coaxialdisk transition,and the non-uniformity decreases with the distance away from the *** uniformity of the magnetic field is improved when increasing the number of feed lines of a linear transformer driver-based accelerator with coaxial-disk *** number of input feed lines should be no less than four in the azimuthal distribution to obtain acceptable uniformity of the magnetic *** make the ratio of the current loss to the total current of the accelerator less than 2%at peak anode current,the ratio of the current in each feed line to the total current should be no less than 8%.