摘要
采用蒙特卡罗方法、有限差分法和有限元法,对脉冲展宽分幅相机的空间分辨特性进行了理论模拟和研究。光电阴极(PC)产生的电子脉冲首先通过脉冲展宽装置轴向拉伸,然后通过三个短磁透镜组成的成像系统成像到微通道板上。当相机成像倍率为1∶1时,电子脉冲发射位置在PC面直径15 mm范围内,相机的空间分辨率大于10 lp/mm。最后研究了相机空间分辨率与电子脉冲的发射位置、PC偏置电压、短磁透镜数量之间的关系,结果显示,空间分辨率与电子脉冲的发射位置、PC偏置电压、短磁透镜数量正相关。
In this study,we theoretically studied and simulated the spatial resolution characteristics of a pulse dilation framing camera using Monte Carlo,finite difference,and finite element methods.The electronic pulses produced by the photo-cathode(PC)are first axially stretched through the pulse dilation device and then imaged on a microchannel plate using an imaging system consisting of three short magnetic lenses.When the imaging ratio is 1∶1 and the position of the electronic pulse emission is within 15 mm of the diameter of the PC surface,the spatial resolution is better than 10 lp/mm.Furthermore,we studied the relationship between spatial resolution and electronic pulse emission position,PC bias voltage,and the number of short magnetic lenses.Our results show that the spatial resolution is positively correlated with the emission position of electron pulse,PC bias voltage,and the number of short magnetic lenses.
作者
罗秋燕
林楷宣
陈嘉杰
王佳恒
黄峻堃
付文勇
蔡厚智
刘进元
Luo Qiuyan;Lin Kaixuan;Chen Jiajie;Wang Jiaheng;Huang Junkun;Fu Wenyong;Cai Houzhi;Liu Jinyuan(Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province,College of Physics and Optoelectronic Engineering,Shenzhen University,Shenzhen 518060,Guangdong,China;College of Computer and Information Engineering,Nanyang Institute of Technology,Nanyang 473500,Henan,China)
出处
《激光与光电子学进展》
CSCD
北大核心
2022年第23期120-126,共7页
Laser & Optoelectronics Progress
基金
国家自然科学基金(11775147)
广东省基础与应用基础研究基金(2019A1515011474,2019A1515110130)
深圳市科技计划项目(JCYJ20200109105201936,JCYJ20190808115605501)。
关键词
成像系统
惯性约束聚变
分幅相机
脉冲展宽
空间分辨率
imaging systems
inertial confinement fusion
framing camera
pulse dilation
spatial resolution
