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同步触发和级联滤波的分幅相机皮秒高压脉冲研究
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作者 帅浩明 白雁力 +1 位作者 姚荣彬 谢军 《深圳大学学报(理工版)》 CAS CSCD 北大核心 2024年第5期556-562,共7页
脉冲展宽分幅相机是脉冲展宽技术与微通道板(microchannel plate,MCP)分幅相机的结合体,其时间分辨率与皮秒高压脉冲呈非线性波动关系.采用同步触发模式和级联结构LC高通滤波器产生皮秒高压脉冲,将其与影响时间分辨率的阴极电压和漂移... 脉冲展宽分幅相机是脉冲展宽技术与微通道板(microchannel plate,MCP)分幅相机的结合体,其时间分辨率与皮秒高压脉冲呈非线性波动关系.采用同步触发模式和级联结构LC高通滤波器产生皮秒高压脉冲,将其与影响时间分辨率的阴极电压和漂移距离结合,应用于脉冲展宽分幅相机的时间分辨率研究中.结果表明,同步触发式多级Marx电路能产生半高宽优于1 ns的高压脉冲,随着级联LC高通滤波器从1阶增至7阶,产生皮秒高压脉冲的半高宽从558 ps降至409 ps,幅值从-3.6 kV降至-1.4 kV,上升沿斜率的非线性波动为5.03~10.25 V/ps;将其加载于MCP通道内的光电子倍增模型,获得的MCP分幅相机时间分辨率由206 ps提高至149 ps;而将其应用于脉冲展宽分幅相机,随着阴极电压和漂移距离增加,时间分辨率的非线性波动为3.8~39.4 ps.通过数据统计和对比发现,当同步触发Marx电路与3阶LC高通滤波电路相结合时,脉冲展宽分幅相机的时间分辨率能达到最优. 展开更多
关键词 超快诊断技术 脉冲展宽分幅相机 皮秒压脉冲 同步触发Marx电路 LC高通滤波技术 时间分辨率
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高级图像清晰度增强技术
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作者 姚海根 《印刷杂志》 2006年第9期51-54,共4页
关键词 清晰度增强 数字相机 高通滤波技术 钝蒙版法
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Efficient channelized technology based on filter banks 被引量:1
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作者 张迪 韩铮 张立萍 《Journal of Measurement Science and Instrumentation》 CAS CSCD 2016年第3期261-265,共5页
With the appearance of novel radar signal with low intercept probability, the bandwidth of radar receiver is wider and wider. Wideband digital receiver becomes a research hotspot in the field of communication... With the appearance of novel radar signal with low intercept probability, the bandwidth of radar receiver is wider and wider. Wideband digital receiver becomes a research hotspot in the field of communication, radar and electronic reconnaissance, etc. As one of wideband digital receiver systems, digital channelized receiver has become a research emphasis due to the characteristics of full probability receiving and processing multiple signals. Digital channelized technology and signal sampling theory are deeply studied and an efficient channelized model is derived based on filter banks. The correctness of the model is verified by computer simulation The model has less computation compared with the traditional model, which is suitable for engineering application 展开更多
关键词 filter banks efficient channelized technology band-pass sampling prototype filter
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