HEX Seminar: Monday March 1, 2021 - MALTA - a radiation hard CMOS pixel sensor for the HL-LHC

Event Date: 

Monday, March 1, 2021 - 12:00pm

Event Location: 

  • Zoom
  • HEX Seminar
Speaker: Patrick Freeman, University of Birmingham
Title: MALTA - a radiation hard CMOS pixel sensor for the HL-LHC

Abstract: The HL-LHC upgrades at CERN will involve higher radiation levels and require the development of novel radiation hard tracking detectors. Depleted monolithic active pixel sensors (DMAPS) are being developed as a potential replacement for hybrid pixel sensors, and have advantages in terms of detector assembly, production costs, and low pixel capacitance. The MALTA prototypes have been fabricated in the TowerJazz 180nm CMOS imaging technology to have a small pixel pitch (36.4 um), low noise (~10 e), low pixel capacitance (5 pF), and low power consumption (~1 uW). I will present results including current-voltage and radioactive source measurements and test beam measurements which demonstrate full efficiency of the most recent prototypes, miniMALTA and MALTA Cz, after irradiation to the level required for the final pixel layer in the ATLAS Inner Tracker upgrade.