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首页> 外文会议>IEEE Nuclear Science Symposium >Development of New Circuit with CSA for X-Ray Astronomical SOI Pixel Detector - Improving Energy Resolution
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Development of New Circuit with CSA for X-Ray Astronomical SOI Pixel Detector - Improving Energy Resolution

机译：X射线天文SOI像素检测器的CSA开发新电路 - 提高能量分辨率

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We have been developing a monolithic active pixel sensor with the silicon-on-insulator (SOI) CMOS technology for use in future X-ray astronomical satellite mission. Our objective is to replace the X-ray Charge Coupled Device (CCD), which is the standard detector in the field, by offering high coincidence time resolution (～ 50 ns), superior hit-position readout time (～ 10 μs), and wider bandpass (0.5 - 40 keV) in addition to having comparable performances in imaging spectroscopy. In order to realize this detector, we have developed prototype detectors, called "XRPIX" series. XRPIX contains comparator circuit in each pixel to detect an X-ray photon injection; it offers intra-pixel hit trigger (timing) and two-dimensional hit-pattern (position) outputs. Therefore, XRPIX is capable of direct access to selected pixels to read out the signal amplitude. In our previous study, we evaluated its basic performance and obtained the X-ray spectra by this system. The next step is improvement in spectroscopic performance. Then, we designed a new prototype, called "XRPIX3", which has charge sensitive amplifier (CSA) in each pixel. The pixel circuit with CSA works good. It is 3.4 times higher gain as compared with normal pixel circuit. Furthermore, XRPIX3 resolved Mn-K_α and Mn-K_β successfully for the first time in our series. The readout noise is 33 e- rms and the energy resolution is about 300 eV FWHM at 5.9 keV. In this paper, we report on the design and test results of this new device.
机译：我们一直在开发一种单片活性像素传感器，具有绝缘体上的硅 - 绝缘体（SOI）CMOS技术，用于将来的X射线天文卫星使命。我们的目的是取代X射线充电耦合装置（CCD），即通过提供高巧合时间分辨率（〜50ns），较高的击球位置读出时间（〜10μs）和除了在成像光谱中具有相当的性能之外，更广泛的带通（0.5 - 40keV）。为了实现这个探测器，我们开发了原型探测器，称为“XRPIX”系列。 XRPIX在每个像素中包含比较器电路以检测X射线光子注入;它提供了一个像素内的命中触发（定时）和二维命中模式（位置）输出。因此，XRPIX能够直接访问所选择的像素以读出信号幅度。在我们以前的研究中，我们评估了它的基本性能并通过该系统获得了X射线光谱。下一步是光谱性能的提高。然后，我们设计了一种新的原型，称为“XRPIX3”，在每个像素中具有充电敏感放大器（CSA）。具有CSA的像素电路工作好。与正常像素电路相比，增益越高。此外，XRPIX3在我们系列中首次解决了Mn-K_α和MN-K_β。读出噪声是33 e-RMS，能量分辨率约为5.9 keV。在本文中，我们报告了这款新设备的设计和测试结果。

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