Time performance of Analog Pixel Test Structures with in-chip operational amplifier implemented in 65 nm CMOS imaging process

作者：Gianluca Aglieri Rinella, Luca Aglietta, M. Antonelli, F. Barile, F. Benotto, S. Beolè, E. Botta, G. Bruno, F. Carnesecchi, D. Colella, Angelo Colelli, G. Contin, G. De Robertis, F. Dumitrache, D. Elia, C. Ferrero, M. Fransen, Alex Kluge, Shyam Kumar, C. Lemoine, F. Licciulli, Bong-Hwi Lim, F. Loddo, M. Mager, Davide Marras, P. Martinengo, C. Pastore, R. N. Patra, Stefania Perciballi, F. Piro, F. Prino, L. Ramello, Arianna Grisel Torres Ramos, F. Reidt, R. Russo, Valerio Sarritzu, Umberto Savino, David Schledewitz, Mariia Selina, S. Senyukov, Mario Sitta, W. Snoeys, Jory Sonneveld, M. Šuljić, Triloki Triloki, Andrea Turcato · 发表于：Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment · 年份：2024 · DOI：10.1016/j.nima.2024.170034 · 被引用次数：5 · 研究领域：Particle Detector Development and Performance、Radiation Detection and Scintillator Technologies、CCD and CMOS Imaging Sensors

In the context of the CERN EP R&D on monolithic sensors and the ALICE ITS3 upgrade, the Tower Partners Semiconductor Co (TPSCo) 65 nm process has been qualified for use in high energy physics, and adopted for the ALICE ITS3 upgrade. An Analog Pixel Test Structure (APTS) featuring fast per pixel operational-amplifier-based buffering for a small matrix of four by four pixels, with a sensor with a small collection electrode and a very non-uniform electric field, was designed to allow detailed characterization of the pixel performance in this technology. Several variants of this chip with different pixel designs have been characterized with a 120 GeV / c positive hadron beam. This result indicates that the APTS-OA prototype variants with the best performance achieve a time resolution of 63 ps with a detection efficiency exceeding 99% and a spatial resolution of 2 μm, highlighting the potential of TPSCo 65 nm CMOS imaging technology for high-energy physics and other fields requiring precise time measurement, high detection efficiency, and excellent spatial resolution.