电子束时间展宽皮秒分幅相机

发布时间：2018-02-11 19:15

本文关键词： 分幅相机时间展宽时间分辨率惯性约束聚变 Z箍缩　出处：《红外与激光工程》2016年12期 　论文类型：期刊论文

【摘要】：研制了基于电子束时间展宽技术和微通道板(microchannel plate,MCP)选通技术的时间展宽分幅相机。相机有三条厚度80 nm、宽度8 mm的微带阴极,阴极上加载斜率为2.1 V/ps的高压斜坡脉冲,使得先发射的电子较后面的电子速度快,经过50 cm的漂移区后,电子束产生时间展宽,从而提高相机时间分辨率。阴极和MCP均加载了脉冲电压,因此,需要精确同步光脉冲、阴极脉冲和MCP选通脉冲,分析了完整的同步过程。当阴极仅加直流电压,无电子束时间展宽时,获得相机的时间分辨率为78 ps。当阴极加载高压斜坡脉冲时,电子束时间展宽技术将系统的时间分辨率提高至12 ps。改变延时,将光脉冲分别同步在斜坡脉冲不同位置,获得了时间分辨率与同步位置的关系。
[Abstract]:Based on the technology of electron beam time broadening and microchannel plate MCPS, a time broadening camera is developed. The camera has three microstrip cathodes with a thickness of 80 nm and a width of 8 mm, and a high voltage slope pulse with a slope of 2.1 V / PS is loaded on the cathode. The electron emitted at first is faster than that in the rear. After the drift region of 50 cm, the electron beam produces time broadening, which improves the time resolution of the camera. Both cathode and MCP load pulse voltage, so it is necessary to accurately synchronize the optical pulse. The complete synchronization process is analyzed for cathode pulse and MCP strobe pulse. When the cathode is only applied DC voltage and no electron beam time is widened, the time resolution of the camera is 78 ps.When the cathode is loaded with high voltage ramp pulse, the time resolution of the camera is 78 ps. when the cathode is loaded with a high voltage ramp pulse, The time resolution of the system is increased to 12 ps by the electron beam time broadening technique. The time delay is changed and the optical pulse is synchronized in different positions of the ramp pulse. The relationship between the time resolution and the synchronous position is obtained.
【作者单位】：深圳大学光电子器件与系统(教育部/广东省)重点实验室;深圳大学信息工程学院;深圳大学物理科学与技术学院;
【基金】：国家自然科学基金(11305107) 中国博士后科学基金(2014M552228) 深圳市科技计划项目(JCYJ20140418182819143)
【分类号】：TN16

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