Karlsruhe 2024 – scientific programme
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T: Fachverband Teilchenphysik
T 90: Silicon trackers 4
T 90.6: Talk
Thursday, March 7, 2024, 17:15–17:30, Geb. 30.22: kl. HS B
Irradiation studies of HV-CMOS MAPS for the LHCb Mighty Tracker — •Hannah Schmitz, Klaas Padeken, Niclas Sommerfeld, and Sebastian Neubert — University of Bonn
The upgraded LHCb downstream tracker (Mighty Tracker), foreseen to be installed during LS4 of the LHC, will consist of six layers HV-CMOS MAPS with a total size of 18m2 covering the central part of the acceptance close to the beampipe. For the pixel (MightyPix) a commercial 180nm process and a chip size of 2cm× 2cm with a pixel size of 55µ m× 165µ m is foreseen. Characterization of a first version and other engineering prototypes are ongoing. HV-CMOS MAPS are optimal sensors to fulfill the requirements that encounter the Mighty Tracker. Due to the increased instantaneous luminosity from 2×1033cm−2s−1 to 1.5×1034cm−2s−1 the downstream tracker has to withstand an irradiation of 3×1014MeVneqcm−2 and a high occupancy. Additionally, a time resolution ≤ 3ns is required to operate the trigger-less 40MHz DAQ implying up to 5Gbit output rate per chip. Furthermore, a low power consumption of ≤ 150mW and a low material budget is needed. Fulfilling these requirements is necessary to ensure a precise tracking. In this presentation irradiation studies of HV-CMOS MAPS are presented. An irradiation campaign with a 14MeV proton beam at the Bonn cyclotron was performed. The operation and further analysis of the sensor was done with the newly developed readout system MARS.
Keywords: Mighty Tracker; Large scale pixel detector; CMOS; Radiation hardness; LHCb