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首页> 外文期刊>Review of Scientific Instruments >Ultrafast turnoff laser triggered gating system for microchannel‐plate intensified x‐ray spectrometers
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Ultrafast turnoff laser triggered gating system for microchannel‐plate intensified x‐ray spectrometers

机译：用于微通道板增强X射线光谱仪的超快截止激光触发选通系统

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A laser triggered photoconductive switch based microchannel‐plate (MCP) gating system has been developed. The gating pulse provided to the MCP has a fall time on the order of 200 ps. Use of this system has resulted in increased signal‐to‐noise ratio on three MCP intensified x‐ray spectrometers during recent x‐ray experiments at the Novette laser facility. The x‐ray signals of interest have a duration of approximately 300 ps while background in the same spectral region continues for several nanoseconds. As a result, signal‐to‐noise ratio is maximized by turning the MCP off just after the signals of interest are recorded. The MCP’s are turned on by charging to approximately 1 kV with a slow rise‐time (500 ns) pulse and rapidly gated off by a photoconductive switch connected to the MCP through transmission lines. Staggering the turnoff times of three microstrip lines across the MCP by 250 ps provides some time resolution. Details of the system, including pulse charging system, trigger beam delivery optics, and system diagnostics will be discussed.
机译：已经开发了基于激光触发的光导开关的微通道板（MCP）门控系统。提供给MCP的选通脉冲的下降时间约为200 ps。在Novette激光设备最近进行的X射线实验期间，使用此系统已导致在三台MCP增强X射线光谱仪上增加了信噪比。感兴趣的X射线信号的持续时间约为300 ps，而同一光谱区域中的背景持续几纳秒。结果，在记录感兴趣的信号后立即关闭MCP，可以最大程度地提高信噪比。通过以缓慢的上升时间（500 ns）脉冲充电至大约1 kV来打开MCP，然后通过通过传输线连接到MCP的光电导开关迅速将其关闭。将跨MCP的三条微带线的关断时间错开250 ps，可以提供一些时间分辨率。将讨论系统的详细信息，包括脉冲充电系统，触发光束传输光学器件和系统诊断程序。

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