Study of CMOS strip sensor for future silicon tracker

Han, Y. and Zhu, H. and Affolder, A. and Arndt, K. and Bates, R. and Benoit, M. and Di Bello, F. and Blue, A. and Bortoletto, D. and Buckland, M. and Buttar, C. and Caragiulo, P. and Chen, Y. and Das, D. and Doering, D. and Dopke, J. and Dragone, A. and Ehrler, F. and Fadeyev, V. and Fedorko, W. and Galloway, Z. and Gay, C. and Grabas, H. and Gregor, I.M. and Grenier, P. and Grillo, A. and Hiti, B. and Hoeferkamp, M. and Hommels, L.B.A. and Huffman, T. and John, J. and Kanisauskas, K. and Kenney, C. and Kramberger, G. and Liu, P. and Lu, W. and Liang, Z. and Mandić, I. and Maneuski, D. and Martinez-Mckinney, F. and McMahon, S. and Meng, L. and Mikuz̆, M. and Muenstermann, D. and Nickerson, R. and Peric, I. and Phillips, P. and Plackett, R. and Rubbo, F. and Ruckman, L. and Segal, J. and Seidel, S. and Seiden, A. and Shipsey, I. and Song, W. and Stanitzki, M. and Su, D. and Tamma, C. and Turchetta, R. and Vigani, L. and Volk, J. and Wang, R. and Warren, M. and Wilson, F. and Worm, S. and Xiu, Q. and Zhang, J. (2020) Study of CMOS strip sensor for future silicon tracker. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 981: 164520. ISSN 0168-9002

Abstract

Monolithic silicon sensors developed with High-Voltage CMOS (HV-CMOS) processes have become highly attractive for charged particle tracking. Compared with the standard CMOS sensors, HV-CMOS sensors can provide larger and deeper depletion regions that lead to larger signals and faster charge collection. They can provide high position resolution, low material budget, high radiation hardness and low cost that are desirable for high performance tracking in harsh collision environment. Various studies have been conducted to explore the technology feasibility for the large-area tracking systems at future collider experiments. CHESS (CMOS HV/HR Evaluation for Strip Sensor) sensor series have been developed as an alternative solution to the conventional silicon micro-strip detectors for the ATLAS inner tracker upgrade. The first prototype (named CHESS1) was to evaluate the diode geometry and the in-pixel analog electronics. Obtained test results were used to optimize the second prototype (named CHESS2). CHESS2 was implemented with a full digital readout architecture and realized as a full reticle sized monolithic sensor. In this paper, the basic characteristics of the CHESS2 prototype sensors and their performance in response to different input signals are presented.