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短磁聚焦时间展宽分幅变像管成像性能及像差分析

Analysis of Imaging Performance and Aberration of Pulse-Dilation Framing Converter Using Short Magnetic Focusing

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摘要

分幅变像管是惯性约束聚变诊断实验中重要的二维空间分辨诊断设备。为研究短磁聚焦时间展宽分幅变像管的成像性能, 通过计算像管中电子运动轨迹和成像分布来模拟空间分辨率和成像面, 并采用像差理论展开分析。结果表明, 短磁聚焦成像系统的球差和场曲是造成像管空间分辨性能下降的主要因素, 单/双透镜像管球差系数分别为0.229和0.07, 场曲分别为0.021和0.009。球差系数和场曲越小, 像管的成像性能越好。

Abstract

The framing converter is an important two-dimensional spatial resolution diagnostic device in the inertial confinement fusion experiment. In order to study the imaging performance of pulse-dilation framing converter using short magnetic focusing, the spatial resolution and imaging surface are simulated by the electron motion trajectory and imaging distribution of the converter, and the aberration theory is used for analysis. The result shows that the spherical aberration and field curvature of short magnetic focused system are the main reasons for the loss of spatial resolution, the spherical aberration of the single/double lenses tube are 0.229 and 0.07, the field curvature are 0.021 and 0.009, respectively. The smaller spherical aberration and field curvature are, the better imaging performance of the tube is.

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中图分类号:TN143;O536

DOI:10.3788/aos201838.0332001

所属栏目:超快光学

基金项目:国家自然科学基金(61263013)、广西自然科学基金重点项目(2016GXNSFDA380001)、广西高校中青年教师基础能力提升项目(2017KY0199)、广西教育厅高校科学技术研究项目(YB2014131)

收稿日期:2017-09-08

修改稿日期:2017-10-16

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白雁力:桂林电子科技大学教学实践部, 广西 桂林 541004
姚荣彬:桂林电子科技大学教学实践部, 广西 桂林 541004
高海英:桂林电子科技大学教学实践部, 广西 桂林 541004
党选举:桂林电子科技大学教学实践部, 广西 桂林 541004
何国民:桂林电子科技大学教学实践部, 广西 桂林 541004

联系人作者:白雁力(bayaly@guet.edu.cn)

备注:白雁力(1979-), 男, 博士, 副教授, 主要从事超快诊断技术方面的研究。E-mail: bayaly@guet.edu.cn

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引用该论文

Bai Yanli,Yao Rongbin,Gao Haiying,Dang Xuanju,He Guomin. Analysis of Imaging Performance and Aberration of Pulse-Dilation Framing Converter Using Short Magnetic Focusing[J]. Acta Optica Sinica, 2018, 38(3): 0332001

白雁力,姚荣彬,高海英,党选举,何国民. 短磁聚焦时间展宽分幅变像管成像性能及像差分析[J]. 光学学报, 2018, 38(3): 0332001

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