Luminosity Detector for PANDA: Sensor Modules

by Niels Boelger (Ruhr-Universitaet Bochum (DE))

Friday 24 Oct 2025, 14:30 → 15:15 Europe/Zurich

NB2/158 (RUB)

Abstract:

The PANDA experiment is primarily focused on hadron spectroscopy.
It will be situated at the FAIR accelerator complex, currently under
construction in Darmstadt. In order to determine the cross sections
of occurring processes a precise knowledge of the luminosity is crucial.
Using a tracking detector the tracks of elastically scattered antiprotons
at small angles are reconstructed and their angular distribution is
measured. This way, a precision of < 5% for the absolute luminosity
can be reached.
The detector consists of four layers of silicon pixel sensors utilizing
the HV-MAPS concept, which combines the fast signal generation of
depleted sensors with a monolithic design to minimize the material
budget. The sensors are glued to both sides of CVD-diamond carriers
mounted to a movable holding structure. To prevent disturbances of
the primary beam the whole setup is operated in a vacuum, introducing
the need of an active cooling system.

251024_rhs_niels_boelger.pdf