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首页> 外文期刊>Review of Scientific Instruments >Coincidence ion imaging with a fast frame camera
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Coincidence ion imaging with a fast frame camera

机译：快速帧相机的重合离子成像

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摘要

A new time- and position-sensitive particle detection system based on a fast frame CMOS (complementary metal-oxide semiconductors) camera is developed for coincidence ion imaging. The system is composed of four major components: a conventional microchannel plate/phosphor screen ion imager, a fast frame CMOS camera, a single anode photomultiplier tube (PMT), and a high-speed digitizer. The system collects the positional information of ions from a fast frame camera through real-time centroiding while the arrival times are obtained from the timing signal of a PMT processed by a high-speed digitizer. Multi-hit capability is achieved by correlating the intensity of ion spots on each camera frame with the peak heights on the corresponding time-of-flight spectrum of a PMT. Efficient computer algorithms are developed to process camera frames and digitizer traces in real-time at 1 kHz laser repetition rate. We demonstrate the capability of this system by detecting a momentum-matched co-fragments pair (methyl and iodine cations) produced from strong field dissociative double ionization of methyl iodide.
机译：开发了一种基于快速帧CMOS（互补金属氧化物半导体）相机的新型时间和位置敏感粒子检测系统，用于重合离子成像。该系统由四个主要组件组成：常规的微通道板/磷屏离子成像仪，快速帧CMOS相机，单阳极光电倍增管（PMT）和高速数字化仪。该系统通过实时质心从快速帧相机收集离子的位置信息，而到达时间是从高速数字化仪处理的PMT的定时信号中获得的。通过将每个相机框架上的离子点强度与PMT对应飞行时间谱上的峰高相关联，可以实现多次打击功能。开发了高效的计算机算法，以1 kHz激光重复频率实时处理相机帧和数字化仪轨迹。我们通过检测由强碘甲烷的强电场解离双电离产生的动量匹配共碎片对（甲基和碘阳离子）来证明该系统的功能。

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