Thin monolithic pixel sensors with fast operational amplifier output in a 65 nm imaging technology.

Mar 16, 2023, 1:45 PM
Bldg 53 / Room 1320 - Panofsky Auditorium (SLAC)

Bldg 53 / Room 1320 - Panofsky Auditorium


2575 Sand Hill Rd Menlo Park, CA USA
Oral Tracking Tracking


Bong-Hwi Lim (Università e INFN Torino)


This work presents results on the Analog Pixel Test Structure (APTS), a 4 x 4 pixel matrix prototype equipped with fast individual OPAMP-based buffering of analog pixel signals to output pads for exploration of pixel timing performance. The work was framed in the ALICE ITS3 upgrade and the CERN-EP R&D on monolithic sensors to explore the TPSCo 65-nm imaging technology. This upgrade will replace the inner layers of the ALICE Inner Tracking System at CERN with ultra-thin flexible wafer-scale monolithic silicon sensors. They will improve the material budget in this region, the tracking precision and the efficiency at low transverse momentum.
The presentation will show the gain of the signal chain in the APTS and its speed as a function of the configuration parameters, including calibration results with a 55Fe source. Two different pixel structures will be compared to demonstrate the possibility of enhancing the performance in terms of timing and charge collection efficiency by implant modifications in the epitaxial layer. Finally test beam results planned at the Super Proton Synchrotron at CERN will provide full spatial and time resolution of the APTS OPAMP structures.

Primary author

Umberto Savino (Università and INFN Torino on behalf of ALICE experiment )


Miljenko Suljic (CERN) Serhiy Senyukov (CERN) Magnus Mager (CERN) Walter Snoeys (CERN) Stefania Beolè (Università di Torino) Franco Benotto (INFN Torino) Elena Botta (Università and INFN - Torino) Luciano Ramello (INFN Torino) Chiara Ferrero (Universitò and INFN - Torino) Francesco Prino (INFN Torino) Mario Sitta (INFN Torino) Francesco Piro (CERN) Stefania Perciballi (Università di Torino) Andrea Turcato (Università di Torino) Antonio Zampieri (INFN Torino) Floarea Dumitrache (INFN Torino) Bong-Hwi Lim (Università e INFN Torino)

Presentation materials