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一个64k像素的CMOS-DEPFET模块用于在MHz率下运行的软X射线DSSC成像仪

Stefano Maffessanti¹, Karsten Hansen², Stefan Aschauer³

¹Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607, Hamburg, Germany. stefano.maffessanti@desy.de.

Scientific reports

|July 21, 2023

概括

信号压缩 (DSSC) 的DEPFET传感器探测器使用了新的64k像素模块,用于在欧洲XFEL进行软X射线检测. 这些模块实现了出色的能量分辨率和高率,满足了项目规格.

科学领域:

物理物理学物理
材料科学材料科学材料科学
仪器化仪器化仪器化

背景情况:

欧洲XFEL需要用于软X射线应用的先进探测器.
现有的探测器在特定的XFEL束结构的能量分辨率和率方面面临限制.

研究的目的:

描述DSSC项目的第一个全格式CMOS-DEPFET阵列的性能.
评估64k像素DEPFET模块的功能和特性,用于软X射线检测.

主要方法:

64k像素DEPFET模块与136μm六角像素的组装和表征.
使用DEPFET技术实现低输入电容和内在信号压缩.
集成读出ASIC与偏差取消,塑造波器,9位ADC和数字内存.

主要成果:

在1.1-MHz的率下达到15 e−rms的等效噪声电荷,并获得26.8 ADU/keV的增益.
在特定的能量和率条件下,获得了13 e−rms的噪声和1000的动态范围.
在更高的能量和更低的率下达到4000的最大动态范围.

结论:

具有特色的DEPFET模块符合欧洲XFEL的DSSC项目的苛刻规格.
DEPFET技术可实现出色的能量分辨率和信号压缩,用于软X射线检测.
开发的探测器模块适用于先进研究设施的高率X射线测量.

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