Initial characterization of the first Speedster-EXD550 event-driven X-ray hybrid CMOS detectors

Joseph M. Colosimo, Hannah M. Grzybowski, Evan C. Jennerjahn, Lukas R. Stone, Abraham D. Falcone, M. Wages, Jacob C. Buffington, David N. Burrows, Zachary E. Catlin, Timothy Emeigh, Freddy Hancock
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Abstract

Abstract. Future x-ray observatories will require imaging detectors with fast readout speeds that simultaneously achieve or exceed the other high-performance parameters of x-ray charge-coupled devices used in many missions over the past three decades. Fast readout will reduce the impact of pile-up in missions with large collecting areas while improving the performance in other respects, such as timing resolution. Event-driven readout, in which only pixels with charge from x-ray events are read out, can be used to achieve these faster operating speeds. Speedster-EXD550 detectors are hybrid complementary metal-oxide semiconductor detectors capable of event-driven readout that were developed by Teledyne Imaging Sensors and Penn State University. We present the initial results from measurements of the first of these detectors, demonstrating their capabilities and performance in both full-frame and event-driven readout modes. These include dark current, read noise, gain variation, and energy resolution measurements from the first two engineering-grade devices.
首批 Speedster-EXD550 事件驱动 X 射线混合 CMOS 探测器的初步特性分析
摘要未来的 X 射线天文台将需要具有快速读出速度的成像探测器,同时达到或超过过去三十年来许多飞行任务中使用的 X 射线电荷耦合器件的其他高性能参数。快速读出将减少大收集区任务中堆积的影响,同时提高其他方面的性能,如定时分辨率。事件驱动读出,即只读出由 X 射线事件产生电荷的像素,可用于实现更快的运行速度。Speedster-EXD550 探测器是由 Teledyne 成像传感器公司和宾夕法尼亚州立大学共同开发的混合型互补金属氧化物半导体探测器,能够进行事件驱动读出。我们介绍了对首款此类探测器进行测量的初步结果,展示了它们在全帧和事件驱动读出模式下的能力和性能。这些结果包括首批两个工程级设备的暗电流、读取噪声、增益变化和能量分辨率测量结果。
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