提出了一种结构紧凑的长脉冲发生器,该发生器的螺旋型Blumlein线由内导体(含磁体)、螺旋型中筒和外导体(含磁体)构成,该结构实现了螺旋型Blumlein线和Tesla变压器的一体化。通过对螺旋型Blumlein线的波传输过程分析,给出了慢波系数、开关闭合电流、用于描述形成线闭合开关处界面上波行为的变量因子等参数的计算公式。采用PIC软件对螺旋型Blumlein线的部分波传输过程进行数值模拟,慢波系数等参数的模拟值与计算值基本相符。进行了恒阻抗负载下螺旋型Blumlein线的原理性实验,实验得到的负载波形与编程计算得到的波形基本吻合。

A compact long pulse generator was presented,whose spiral Blumlein line possessed inner magnetic conductor cylinder,central spiral cylinder and outer magnetic conductor cylinder.The spiral Blumlein line was charged by means of a built-in high coupling Tesla transformer,whose primary coil was adjacent to outer conductor cylinder and secondary coil was located between central spiral cylinder and outer conductor cylinder.Theoretic calculation of characteristic parameters,such as slow wave coefficient,switch closing current,variable factors describing wave transmission behavior on the interface of closed switch,was given by physical analysis of wave transmission on spiral Blumlein line.Numerical simulation of part of wave transmission courses on spiral Blumlein line was proceeded by PIC software,and simulated values of parameters such as slow wave coefficient,were approximately equal to calculated ones.The principle experiment to generate a long pulse on a Blumlein spiral line with constant impedance film load was proceeded,and the derived load voltage waveforms accorded with those obtained from programmed computation.