Design and Application of Large Current Pulse Generator

LIN Kai-xuan; LUO Qiu-yan; CHEN Jia-jie; WANG Jia-heng; HUANG Jun-kun; WANG Dong; LIU Jin-yuan; NIU Li-hong; CAI Hou-zhi

doi:10.12263/DZXB.20220851

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Design and Application of Large Current Pulse Generator

PAPERS | 更新时间：2025-12-11

- Design and Application of Large Current Pulse Generator
- ACTA ELECTRONICA SINICA Vol. 52, Issue 5, Pages: 1469-1477(2024)
- 作者机构：
  
  深圳大学物理与光电工程学院，光电子器件与系统教育部/广东省重点实验室，广东深圳 518060
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China(11775147);Guangdong Basic and Applied Basic Research Foundation(2019A1515011474;2019A1515110130);Shenzhen Science and Technology Program(JCYJ20210324095007020;JCYJ20200109105201936;JCYJ20190808115605501)
- DOI：10.12263/DZXB.20220851
  CLC： TN29;TM89
- Received：18 July 2022，
  
  Revised：2023-01-03，
  
  Published：25 May 2024
- 稿件说明：
移动端阅览
林楷宣,罗秋燕,陈嘉杰,等. 大电流脉冲发生器设计及应用[J]. 电子学报,2024,52(05):1469-1477.

LIN Kai-xuan, LUO Qiu-yan, CHEN Jia-jie, et al. Design and Application of Large Current Pulse Generator[J]. Acta Electronica Sinica, 2024, 52(05): 1469-1477.
林楷宣,罗秋燕,陈嘉杰,等. 大电流脉冲发生器设计及应用[J]. 电子学报,2024,52(05):1469-1477. DOI：10.12263/DZXB.20220851

LIN Kai-xuan, LUO Qiu-yan, CHEN Jia-jie, et al. Design and Application of Large Current Pulse Generator[J]. Acta Electronica Sinica, 2024, 52(05): 1469-1477. DOI：10.12263/DZXB.20220851

摘要

长磁透镜是展宽型分幅相机的重要部件，使用大电流激励长磁透镜可在漂移区产生强磁场，从而提高相机空间分辨率.由于焦耳热效应的影响，长磁透镜无法长时间工作在大电流环境下.本研究基于串并联Marx结构，设计了应用于长磁透镜的电流脉冲发生器，研究了充电电压、储能电容、负载以及电路串、并联级数对输出电流脉冲的影响.当充电电压增大，储能电容值增大，负载减小，串联级数增加时，脉冲峰值电流增大；并联级数增加时，峰值电流呈先增后减的变化趋势.当储能电容值增大，负载增大，串联级数减少，并联级数增加时，脉冲半高宽增大.建立长磁透镜模型，模拟了长磁透镜轴上磁场强度分布.长磁透镜内径越大，轴上磁感应强度越弱；激励电流越大，磁感应强度越强.采用四级串联、两路并联的Marx脉冲电路产生了峰值457 A，半高宽6.76 ms的电流脉冲.该电流脉冲激励长磁透镜，获得了53.72 μm的空间分辨率.

Abstract

The long magnetic lens is an important part of the dilation framing camera. It can generate a strong magnetic field in the drift region when stimulated by large current

thus improving the spatial resolution of the camera. Due to the joule heat effect

the long magnetic lens cannot work in large current environment for a long time. In this study

the current pulse generator applied to the long magnetic lens is designed based on the series and parallel Marx structure. The effects of charging voltage

energy-storage capacitance

load

circuit series and parallel stages on the output current pulse are studied. While the charging voltage and energy-storage capacitance increases

the pulse peak current becomes larger. The same is true when the number of series stages is increased or the load decreases. When the number of parallel stages increases

the peak current increases at first and then decreases. In addition

the pulse width is larger by increasing the energy-storage capacitance

the load

and the number of parallel stages. When the number of series stages increases

the pulse width decreases. A long magnetic lens model is established to simulate the magnetic field intensity distribution on the axis. The larger the inner diameter of the long magnetic lens

the weaker the magnetic induction intensity. The greater the excitation current

the stronger the magnetic induction intensity. A pulse with peak current of 457 A and full width at half maximum of 6.76 ms is generated by Marx pulse circuit with four stages in series and two in parallel. The current pulse excites the long magnetic lens

and the spatial resolution of 53.72 μm is obtained.

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