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SUMMARY:Radiation Hard Pixel Sensors for the Phase 2 Upgrade of the CMS In
 ner Tracker
DTSTART;VALUE=DATE-TIME:20230907T102000Z
DTEND;VALUE=DATE-TIME:20230907T104000Z
DTSTAMP;VALUE=DATE-TIME:20260811T113935Z
UID:indico-contribution-2965@indico.tlabs.ac.za
DESCRIPTION:Speakers: Georg Steinbrueck (Hamburg University)\nThe Inner Tr
 acker (IT) of the Compact Muon Solenoid (CMS) experiment of the Large Hadr
 on Collider at CERN will be upgraded for the High-Luminosity LHC (HL-LHC).
  In the ultimate running scenario\, the expected integrated luminosity at 
 the end of the HL-LHC running phase is 4000 fb$^{-1}$\, corresponding to a
  1 MeV neutron equivalent fluence of $3.5 \\times 10^{16}$ cm$^{-2}$ and a
  total ionizing dose (TID) of 19 MGy at the innermost layer of the IT. All
  the layers of the IT (except for the innermost barrel layer) will be equi
 pped with planar n$^+$-p pixel sensors with an active thickness of 150 µm
  and pixel sizes of 25 µm x 100 µm. The innermost barrel layer will feat
 ure 3D silicon sensors owing to their excellent radiation hardness and low
 er power consumption\; and it is foreseen to be exchanged at least once du
 ring HL-LHC operation. Planar and 3D prototype sensors from different prod
 ucers and with a variety of pixel cell designs were bump bonded to the dem
 onstrator readout chip (RD53A) and to the CMS prototype chip (CROC)\, both
  implemented in 65 nm CMOS technology. In this presentation\, we report on
  an extensive qualification campaign performed over the last four years in
  the laboratory and at the CERN and DESY test beam facilities. The sensor-
 chip assemblies were tested before and after proton irradiation up to end-
 of-lifetime fluences of $2 \\times 10^{16}$. Measurements of the hit effic
 iency\, spatial resolution\, crosstalk\, and noise studies are presented. 
 For all parameters investigated\, the results meet or exceed the specifica
 tions by CMS. Based on the results of these measurements and on tracking a
 nd thermal simulations\, sensor designs were chosen for the IT Upgrade and
  CMS has started to prepare for the production phase of pixel sensors and 
 modules. The main lessons learned on the path to the choice of a radiation
  hard sensor will be summarized.\n\nhttps://indico.tlabs.ac.za/event/112/c
 ontributions/2965/
LOCATION: Meeting Room 2.64 - 2.66
URL:https://indico.tlabs.ac.za/event/112/contributions/2965/
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