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首页> 外文会议>International Conference on Synchrotron Radiation Instrumentation >Application of An Avalanche Photodiode in Synchrotron-Based Ultra-fast X-Radiography
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Application of An Avalanche Photodiode in Synchrotron-Based Ultra-fast X-Radiography

机译：雪崩光电二极管在基于同步的超快速X造影中的应用

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A possibility of using avalanche photodiode has been investigated while operated in current or continuous wave mode to accommodate high-intensity synchrotron x-ray beams in an ultra-fast x-radiography. To achieve a time resolution of 1 μs or better in a time-resolved x-radiograhic experiment, the entire time-sequence of the APD response to the pulsed synchrotron x-ray beam is recorded with time resolution of 1–2 ns. We have characterized the APD detector in the continuous wave mode to reveal its linearity, signal to noise ratio, and the time response with various circuit configurations. We have demonstrated that signal-to-noise ratio better than 1000 can be achieved, which is limited only by Poisson statistics. These detectors, coupled with finely focused x-rays, have been used to study structure and dynamics of supersonic fuel sprays with 50 μm-spatial resolution and μs-temporal resolution in the region close to an injection nozzle.
机译：已经研究了使用雪崩光电二极管的可能性，同时以电流或连续波模式操作，以在超快速X射线照相术中容纳高强度同步X射线束。为了在时间分辨的X-GroadalGrahic实验中实现1μs或更好的时间分辨率，对脉冲同步X射线束的APD响应的整个时间序列被记录为1-2ns的时间分辨率。我们已经在连续波模式下表征了APD检测器，以揭示其线性度，信号到噪声比，以及各种电路配置的时间响应。我们已经证明，可以实现优于1000的信噪比，仅限于泊松统计。这些探测器与精细聚焦的X射线相耦合，已用于研究具有50μm空间分辨率的超音速燃料喷雾的结构和动力学和靠近注射喷嘴的区域中的μs-时间分辨率。

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