Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
T: Fachverband Teilchenphysik
T 9: Silicon Detectors I
T 9.1: Vortrag
Montag, 16. März 2026, 16:15–16:30, KH 01.012
Particle Identification Based on the Time-over-Threshold with MuPix11 Sensors — •Effrosyni Zachou for the HVMAPS HD collaboration — Physikalisches Institut, Universität Heidelberg, Germany
The High-Voltage Monolithic Active Pixel Sensors (HV-MAPS) extend the monolithic design concept by embedding the readout electronics in a deep n-well, enabling high voltage operation and fast charge collection via drift. The MuPix11 is a HV-MAPS chip with a pixel size of 80 × 80 µ m2 that can be thinned to 50 µ m, offering low material budget and precise spatial and time resolution.
The analogue pixel signal is digitised in the periphery, producing leading- and trailing-edge timing information from which the Time-over-Threshold (ToT) is computed. Since charged particles deposit different amounts of energy depending on their type and momentum, the ToT provides a useful proxy for measuring energy deposition and distinguishing different particles.
This work presents preliminary results from testbeam campaigns conducted at the Paul Scherrer Institute with the goal of systematically investigating the dependence of the ToT response on particle type and momentum. The measurements were performed with a setup consisting of four layers, each composed of four MuPix11 sensors mounted on a single printed circuit board. By reconstructing particle trajectories across the sensor planes, hits are associated with individual particles, enabling a track-based analysis of the ToT response.
Keywords: Pixel Detectors; HV-MAPS; HV-CMOS; Particle Identification