The Mighty Tracker for LHCb Upgrade II

by Klaas Padeken (University of Bonn (DE))

Friday 31 Oct 2025, 14:30 → 15:15 Europe/Zurich

NB2/158 (RUB)

Abstract:

After Long Shutdown 4 LS4 of the LHC the LHCb experiment expects an instantaneous luminosity up to 1x10³⁴ cm^-2s^-1 . This results  in 300 fb^-1 of recorded data after Run 5 and 6. To achieve the physics goals, the detector needs to be upgraded to ensure efficient tracking and particle identification. Therefore, all subdetectors are planned to be upgraded during LS4. This talk will introduce the planned upgrade and with a focus on the new downstream tracker behind the dipole magnet.

The technology of the tracking stations is under ongoing development. For the downstream tracker will be built as a hybrid tracker with scintillating fibers on the for the outer regions and monolithic pixel sensors for the central high occupancy region.
To match the detector requirements, the power consumption should be less than 150 mW and the timing in orders of 3 ns. Furthermore, the overall material budget needs to be less than 2% of the radiation length X₀.

This presentation covers an overall introduction of the planned Mighty Tracker with focus on the used HV-CMOS technology and the upcoming challenges for this detector.