HIGH SPEED PROCESSING FOR X-RAY DETECTOR ARRAYS

能量=色散X射线探测器阵列的阵列被大量使用于 在同步辐射装置上进行的生物学研究，特别是 吸收光谱在荧光模式下对稀释样品，因为 单个半导体光谱仪典型地变得堆积受限， 40- 80，000计数/秒。 目前的研究建议增加 单个探测器的处理速率提高10倍或更多， 利用来自存储环源的X射线不是随机到达的事实 而是仅在由固定间隔分开的时间。 因此如果一 光子可以在更短的时间内完全处理， 探测器可以完全消除。 因为这些处理时间是 比目前使用的短10，将有相当大的创新， 需要保持可接受的能量分辨率。 在这方面，我们将 试图确定这一目标是否可以通过以下组合来实现： 时变滤波，检测器重新设计以最小化电容，以及 应用最新进展的设计CCD放大器。 成功 将导致探测器能够计数一百万计数/秒，堆积 免费，这将提高这些实验的生产力的因素 的10-20。

Arrays of energy=dispersive x-ray detector arrays are heavily used in biological research at synchrotron radiation facilities, particularly for absorption spectroscopy in fluorescence mode on dilute samples because an individual semiconductor spectrometer typically becomes pileup limited at 40-80,000 counts/sec. The present research proposes to increase the processing rate of the individual detectors by a factor of 10 or more by using the fact that x-rays from storage ring sources do not arrive randomly but rather only at times separated by fixed intervals. Therefore, if a photon can be completely processed in a shorter time, pileup in the detector can be completely eliminated. Because these processing times are shorter by 10 than those currently used, considerable innovation will be required to retain acceptable energy resolution. In this effort we will attempt to determine whether this goal can be reached by a combination of time variant filtering, detector redesign to minimize capacitance, and application of recent advances in the design of CCD amplifiers. Success would lead to detectors capable of counting a million counts/sec, pileup free, which would increase the productivity of these experiments by factors of 10-20.