XPOL-III a new generation low noise readout ASIC for x-ray single photon detection

M. Minuti; L. Baldini; A. Brez; R. Bellazzini; M. Pesce-Rollins; M. Pinchera; L. Latronico; L. Lucchesi; A. Manfreda; L. Orsini; C. Sgrò; G. Spandre

doi:10.1117/12.2675986

5 October 2023 XPOL-III a new generation low noise readout ASIC for x-ray single photon detection

M. Minuti, L. Baldini, A. Brez, R. Bellazzini, M. Pesce-Rollins, M. Pinchera, L. Latronico, L. Lucchesi, A. Manfreda, L. Orsini, C. Sgrò, G. Spandre

Author Affiliations +

Proceedings Volume 12678, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXIII; 126780N (2023) https://doi.org/10.1117/12.2675986
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Abstract

XPOL-III is a recently developed 180 nm CMOS VLSI ASIC integrating more than 100K pixels at 50um pitch in a total active area of 15 X 15 mm² . Each channel directly samples the charge collected at its own anode and holds it for readout through the built-in, low noise spectroscopic electronics chain. A global control circuit allows for the reconstruction of the spatial distribution of the event charge and the suppression from the readout stream of those pixels below a programmable signal threshold. XPOL-III inherits from previous generations of this ASIC, and extends its predecessor’s performances in terms of readout speed and response uniformity, making XPOL-III a suitable option for high resolution, low noise, high data throughput X-ray detectors. Implementing a single photon detection architecture, XPOL-III provides accurate timing, energy and position resolved measurements when coupled to a proper photon to charge converter. We spot the principles of operation of XPOL-III and summarize the preliminary test results when integrated in its original context, the Gas Pixel Detector (GPD), the same detector class currently at the focus of the Imaging X-ray Polarimetry Explorer (IXPE) telescopes.

Conference Presentation

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

M. Minuti, L. Baldini, A. Brez, R. Bellazzini, M. Pesce-Rollins, M. Pinchera, L. Latronico, L. Lucchesi, A. Manfreda, L. Orsini, C. Sgrò, and G. Spandre "XPOL-III a new generation low noise readout ASIC for x-ray single photon detection", Proc. SPIE 12678, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXIII, 126780N (5 October 2023); https://doi.org/10.1117/12.2675986

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