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Calibration methods for charge integrating detectors
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2022 (English)In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 1024, article id 166078Article in journal (Refereed) Published
Abstract [en]

Since the introduction of the extremely intense X-ray free electron lasers, the need for low noise, high dynamic range and potentially fast charge integrating detectors has increased significantly. Among all the problems that research and development groups have to face in the development of such detectors, their calibration represents one of the most challenging and the collaboration between the detector development and user groups is of fundamental importance. The main challenge is to develop a calibration suite that is capable to test the detector over a wide dynamic range, with a high granularity and a very high linearity, together with a certain radiation tolerance and the possibility to well define the timings and the synchronization with the detector. Practical considerations have also to be made like the possibility to calibrate the detector in a reasonable time, the availability of the calibration source at the experimental place and so on. Such a calibration test suite is often not represented by a single source but by several sources that can cover different parts of the dynamic range and that need to be cross calibrated to have a final calibration curve. In this respect an essential part of the calibration is also to develop a mathematical model that allows calibrating the entire dynamic range, taking into account features that are calibration source and/or detector specific. The aim of this contribution is to compare the calibration for the AGIPD detector using several calibration sources such as internal current source, backside pulsing, IR pulsed laser, LED light and mono-energetic protons. The mathematical procedure used to calibrate the different sources will be discussed in great detail showing how to take into account a few shortcomings (like pixel coupling) that are common for many charge integrating detectors. This work has been carried out in the frame of the AGIPD project for the European X-ray Free Electron Laser. 

Place, publisher, year, edition, pages
2022. Vol. 1024, article id 166078
Keywords [en]
2D detector, Detector calibration, Hybrid pixel detector, Instrumentation for FEL, X-ray detectors
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:miun:diva-44004DOI: 10.1016/j.nima.2021.166078ISI: 000784292400015Scopus ID: 2-s2.0-85121296607OAI: oai:DiVA.org:miun-44004DiVA, id: diva2:1623140
Available from: 2021-12-28 Created: 2021-12-28 Last updated: 2025-02-14Bibliographically approved

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Graafsma, Heinz

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Department of Electronics Design
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Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Subatomic Physics

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