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arXiv 2101.12481astro-ph.IM
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TES探测器中的脉冲处理:基于最优滤波的不同短滤波器方法的比较。Athena X-IFU案例研究

Pulse processing in TES detectors: comparison of different short filter methods based on optimal filtering. Case study for Athena X-IFU

Beatriz Cobo, Nicolás Cardiel, María Teresa Ceballos, Philippe Peille

摘要:

在欧空局雅典娜飞行任务的框架内,X射线雅典娜天文台上的X射线积分场单元仪器是一个低温微量热计阵列,由跃迁边缘传感器探测器组成,目的是提供空间分辨的高分辨率光谱学。作为机载事件处理器(EP)的一部分,重建软件将提供撞击探测器并在其上感应电流脉冲的入射X射线光子的能量、空间位置和到达时间。作为标准的最佳滤波技术,所选基线重建算法,已经分析了不同的修改以处理比高分辨率所考虑的脉冲更短的脉冲(其中由于在它们之后的闭合脉冲而不能获得完整长度的那些),以便基于能量分辨率和计算性能结果来选择最佳选项。可以得出结论,优化短滤波器的能量分辨率的最佳方法是0填充滤波技术,也受益于计算资源的减少。然而,由于缺乏关于飞行中实际稳定性的综合信息,其对偏移波动的高度敏感性目前阻止其用作X-IFU应用的基线治疗。

英文摘要:

In the framework of the ESA Athena mission, the X-ray Integral Field Unit (X-IFU) instrument to be on board the X-ray Athena Observatory is a cryogenic micro-calorimeter array of Transition Edge Sensor (TES) detectors aimed at providing spatially resolved high-resolution spectroscopy. As a part of the on-board Event Processor (EP), the reconstruction software will provide the energy, spatial location and arrival time of the incoming X-ray photons hitting the detector and inducing current pulses on it. Being the standard optimal filtering technique the chosen baseline reconstruction algorithm, different modifications have been analyzed to process pulses shorter than those considered of high resolution (those where the full length is not available due to a close pulse after them) in order to select the best option based on energy resolution and computing performance results. It can be concluded that the best approach to optimize the energy resolution for short filters is the 0-padding filtering technique, benefiting also from a reduction in the computational resources. However, its high sensitivity to offset fluctuations currently prevents its use as the baseline treatment for the X-IFU application for lack of consolidated information on the actual stability it will get in flight.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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