The readout system based on the ultra-fast waveform sampler DRS4 for the Large-Sized Telescope of the Cherenkov Telescope Array
The readout system based on the ultra-fast waveform sampler DRS4 for the Large-Sized Telescope of the Cherenkov Telescope Array
复制标题
基于超快波形采样器DRS4的切伦科夫望远镜阵列大型望远镜读出系统
DOI：
10.1088/1742-6596/1468/1/012104
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
Seiya Nozaki et al.
中科院分区：
文献类型：
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作者：
MAGIC;and FERMI-LAT Collaborations;Seiya Nozaki et al.;Seiya Nozaki et al.
切伦科夫望远镜阵列（CTA）是下一代地面高能伽玛射线天文台。通过使用三种类型的望远镜，CTA可以覆盖较宽的能量范围（20 GeV-300 TeV），灵敏度比现有望远镜高一个数量级。大型望远镜（LST）设计用于探测20个GeV-1 TeV伽马射线，这要归功于大的光收集区域、灵敏的光传感器、快速触发系统和读出电子设备。摄像机读出系统必须具有高信噪比和大动态范围的线性信号采样，才能有效地探测微弱低能大气雨。为了满足这一要求，我们使用Domino Ring Sampler版本4 (DRS4)，它还支持以低功耗进行超快速采样。DRS4芯片的一些固有特性需要软件修正。这些方法降低了非高斯噪声的影响，提高了系统的时序分辨率。在这篇文章中，我们讨论了校准算法和结果性能。
The Cherenkov Telescope Array (CTA) is the next-generation ground-based very-high-energy gamma-ray observatory. By using three types of telescopes CTA can cover a wide energy range (20 GeV–300 TeV) with an order of magnitude higher sensitivity than the current telescopes. The Large-Sized Telescope (LST) is designed to detect 20 GeV–1 TeV gamma rays thanks to the large light collection area, sensitive photosensors, a fast trigger system, and readout electronics. The camera readout system must have a high signal-to-noise ratio and a linear signal sampling with a large dynamic range in order to efficiently detect dim and low-energy atmospheric showers. To meet this requirement we use the Domino Ring Sampler version 4 (DRS4), which also enables ultra-fast sampling with low power consumption. Some of the intrinsic characteristics of DRS4 chips require software corrections. These procedures lower the effect of non-Gaussian noise contribution and improve the timing resolution of the system. In this contribution we discuss the calibration algorithms and the resulting performance.