论文标题
雅典娜WFI的类似飞行的DEPFET传感器的光谱性能
Spectroscopic performance of flight-like DEPFET sensors for Athena's WFI
论文作者
论文摘要
Athena X射线望远镜的宽场成像仪由使用DepFet传感器以滚动快门读数模式运行的两个背面照明探测器组成：一个大型检测器阵列，具有四个具有512x512像素的传感器，每个传感器和一个小探测器可促进WFI的高计数能力，以供应WFI的高度计数能力，以实现亮点的亮点。这两个传感器均以整个尺寸制造，具有像素布局，制造技术和读数模式，以前面的原型制作阶段选择。我们介绍了这些类似飞行的探测器的光谱性能在靶向能量范围的相关部分在仪器的时序要求方面，针对目标能量范围从0.2 keV到15 keV。对于由Iron-55源产生的5.9 keV光子，在频谱中，在发射峰的一半最大宽度表示的光谱性能对于大检测器为126.0 eV，快速检测器为129.1 eV。对摄像机信号链的初步分析还允许在名义操作阶段结束时对空间的性能进行首次预测。
The Wide Field Imager for the Athena X-ray telescope is composed of two back side illuminated detectors using DEPFET sensors operated in rolling shutter readout mode: A large detector array featuring four sensors with 512x512 pixels each and a small detector that facilitates the high count rate capability of the WFI for the investigation of bright, point-like sources. Both sensors were fabricated in full size featuring the pixel layout, fabrication technology and readout mode chosen in a preceding prototyping phase. We present the spectroscopic performance of these flight-like detectors for different photon energies in the relevant part of the targeted energy range from 0.2 keV to 15 keV with respect to the timing requirements of the instrument. For 5.9 keV photons generated by an iron-55 source the spectral performance expressed as Full Width at Half Maximum of the emission peak in the spectrum is 126.0 eV for the Large Detector and 129.1 eV for the Fast Detector. A preliminary analysis of the camera's signal chain also allows for a first prediction of the performance in space at the end of the nominal operation phase.
