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Article
Report number	arXiv:2310.10188
Title	High-rate, high-resolution single photon X-ray imaging: Medipix4, a large 4-side buttable pixel readout chip with high granularity and spectroscopic capabilities
Author(s)	Sriskaran, Viros (CERN) ; Alozy, Jerome (CERN) ; Ballabriga, Rafael (CERN) ; Campbell, Michael (CERN) ; Christodoulou, Pinelopi (CERN ; CTU, Prague) ; Heijne, Erik (CTU, Prague) ; Koukab, Adil (Ecole Polytechnique, Lausanne) ; Kugathasan, Thanushan (CERN) ; Llopart, Xavier (CERN) ; Piller, Markus (CERN ; Graz, Tech. U.) ; Pulli, Adithya (CERN) ; Sallese, Jean-Michel (Ecole Polytechnique, Lausanne) ; Tlustos, Lukas (CERN ; CTU, Prague)
Publication	2024-02-16
Imprint	2023-10-16
Number of pages	15
In:	JINST 19 (2024) P02024
DOI	10.1088/1748-0221/19/02/P02024
Subject category	physics.ins-det ; Detectors and Experimental Techniques
Abstract	The Medipix4 chip is the latest member in the Medipix/Timepix family of hybrid pixel detector chips aimed at high-rate spectroscopic X-ray imaging using high-Z materials. It can be tiled on all 4 sides making it ideal for constructing large-area detectors with minimal dead area. The chip is designed to read out a sensor of 320 x 320 pixels with dimensions of 75 μm x 75 μm or 160 x 160 pixels with dimensions of 150 μm x 150 μm. The readout architecture features energy binning of the single photons, which includes charge sharing correction for hits with energy spread over adjacent pixels. This paper presents the specifications, architecture, and circuit implementation of the chip, along with the first electrical measurements.
Copyright/License	preprint: (License: arXiv nonexclusive-distrib 1.0) publication: © 2024-2025 The Author(s) (License: CC-BY-4.0)

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