分幅相机的皮秒高压脉冲控制系统研究  

Study on the Control System of Picosecond High-voltage Pulse of Framing Camera

作　　者：帅浩明 白雁力 秦兴国 SHUAI Haoming;BAI Yanli;QIN Xingguo(School of Electronic Engineering and Automation,Guilin University of Electronic Technology,Guilin 541004,China;School of Computer Science and Information Security,Guilin University of Electronic Technology,Guilin 541004,China)

机构地区：[1]桂林电子科技大学电子工程与自动化学院,桂林541004 [2]桂林电子科技大学计算机与信息安全学院,桂林541004

出　　处：《光子学报》2024年第12期126-136,共11页Acta Photonica Sinica

基　　金：国家自然科学基金(No.11865007);广西自然科学基金(No.2022GXNSFAA035561);广西自动检测技术与仪器重点实验室主任基金(No.YQ22101)。

摘　　要：微通道板和脉冲展宽分幅相机是应用于研究惯性约束聚变等离子体时空演化过程的超快诊断设备,通常其控制系统包括条纹相机的工控系统和分幅相机的群控系统,虽然两者都能实现电源的开启和关闭,直流电压档位的选择和相关环境参数的监控,但却无法实现对皮秒高压脉冲的动态控制。为此,采用STM32和继电器设计多通道控制系统,并将其融入皮秒高压脉冲发生器,在实现动态皮秒高压脉冲的同时,分析脉冲性能与分幅相机时间分辨率的关系。研究结果表明,通过融入多通道控制系统,一台皮秒高压脉冲发生器,能实现8种V型皮秒高压脉冲的输出,其幅值、半高宽和上升沿斜率的范围分别为-1.212~-1.887 kV、245~327 ps和3.61~10.01 V/ps。将动态性能的皮秒高压脉冲用于MCP分幅相机,获得时间分辨率的范围为95.23~121.79 ps;而用于脉冲展宽分幅相机时,结合阴极电压和漂移距离的影响,获得的时间分辨率波动范围为1.5~31.4 ps。研究结果不仅为弥补超快诊断设备控制系统的空缺功能提供参考途径,也为在超快诊断和高功率脉冲领域,融入自动控制技术提供一种参考方法。The Microchannel Plate(MCP)and Pulse-dilation Framing Cameras(PDFC)are ultra-fast diagnostic devices,which used to study the spatio-temporal evolution of plasma in the inertial confined fusion.Generally,the control system includes the industrial control system of the streak camera and the group control system of the framing camera.Although both can realize the power on and off,the selection of the DC voltage gear and the monitoring of relevant environmental parameters,they still can not realize the dynamic control of Picosecond High-voltage Pulse(PHVP).Therefore,designing an output performance control system for PHVP generators is not only facilitates an in-depth analysis of the relationship between PHVP and the Temporal Resolution(TR)performance of Framing Camera(FC),but also addressing the lack of dynamic control in the industrial control systems of ultra-fast diagnostic equipment.In order to achieve the control of dynamic performance pulse output,an analysis of the impact of PHVP on the TR of the FC is conducted.Firstly,STM32 master control technology and relays are utilized to design a multi-channel control circuit system.A PHVP generator is designed using the avalanche transistors and the LC high-pass filters,and the two are integrated to achieve control over the PHVP output performance.Subsequently,the photoelectron multiplication model within the MCP channel is established,and the calculation methods for the MCP and PDFC are analyzed.Finally,the PHVP is applied to the study of the TR of the FC,and the influence of dynamic performance of the PHVP on TR is analyzed.In the aspect of study results,the working principle and properties of single chip microcomputer and relay are studied and analyzed.Meanwhile,by combining these two,a multi-channel gating control system is designed.The PHVP generator integrated with the multi-channel gating control system is designed using the avalanche transistors and the LC high-pass filters,it is enabled to produce eight types of V-shaped PHVPs with varying performance characte

关 键 词：超快诊断技术 分幅相机 皮秒高压脉冲发生器 动态控制 时间分辨率 

分 类 号：TN143[电子电信—物理电子学]