Erlangen 2026 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 55: Silicon Detectors VI

T 55.9: Vortrag

Mittwoch, 18. März 2026, 18:15–18:30, KH 01.022

Particle-Weighted Material Budget Studies for the Mighty Pixel Layer and Enclosure Box in LHCb Upgrade II — •Rehan Waheed Haroon Rashid Sayyed, Ksenia Solovieva, and Marco Gersabeck — Physikalisches Institut, Albert-Ludwigs-Universitat Freiburg, Freiburg, Germany

The LHCb Upgrade II requires a complete redesign of the downstream tracking system to withstand extreme particle flux at increased luminosity. The Mighty Tracker design, featuring interleaved Mighty Pixel and Mighty SciFi layers, must minimise both active and passive material to preserve tracking performance. The work centers on optimising the layout of material in Mighty Pixel layers, focusing on the thermal enclosure box and the strategic placement of associated electronics (HDI and DCDC converters). Particle-weighted material budget estimations are performed using simplified simulations of particle trajectories through these system components, including staves (comprising carbon foam, Nomex, titanium cooling tubes, and other materials), the readout-flex, the enclosure, and the electronics. The study specifically targets the geometric and material optimisation of these elements. A primary objective is to determine the optimal placement for high-density electronics, evaluating whether to integrate them within the enclosure volume, mount them on its exterior, or position them further away, based on their exposure to the particle flux. This work aims to design a Mighty Pixel layer system that minimises the degradation of track quality from material-particle interactions, thereby supporting the overall physics performance goals of the LHCb Upgrade II tracker.