Erlangen 2026 – scientific programme
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T: Fachverband Teilchenphysik
T 55: Silicon Detectors VI
T 55.10: Talk
Wednesday, March 18, 2026, 18:30–18:45, KH 01.022
Development and Validation of a TID irradiation setup based on a strong 90Sr β-source — •David Kuhn, Sebastian Bachmann, Lucas Dittmann, Ruben Kolb, Ulrich Uwer, and Celina Welschoff — Physikalisches Institut, Universität Heidelberg
During Long Shutdown 4 of LHC, the LHCb detector is planned to receive its Upgrade II to be able to cope with the significant increase in instantaneous luminosity to up to 1.0 × 1034 cm−2s−1. As part of the upgrade the current scintillating fiber tracker will be replaced by the Mighty Tracker. This new main tracker will continue to use scintillating fibers in the outer region. In the inner region, however, the required granularity and radiation tolerance exceed the capabilities of this technology. There, a silicon-based pixel detector will be employed instead. The proposed technology for this is High Voltage Monolithic Active Pixel Sensor (HV-MAPS).
As the MightyTracker pixel detector will be subject to ionizing radiation damage up to dose of 40 Mrad during its lifetime, the associated influence on the operation of the pixel sensors needs to be studied precisely. For this, a setup utilizing a 3.7 GBq Strontium-90 β-source is developed and simulated using FLUKA. The simulated dose rate of up to 10 krad/h for silicon pixel detectors in the irradiation setup can be validated by using dose rate and hit rate measurements. In this talk the development and validation process of the irradiation setup will be presented.
Keywords: LHCb; Mighty Tracker; HV-MAPS; TID Damage; Silicon Pixel Detector