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T: Fachverband Teilchenphysik
T 30: Silicon Detectors III
T 30.3: Vortrag
Dienstag, 17. März 2026, 16:45–17:00, KH 01.012
Radiation damage studies of the ATLAS ID Pixel detector at LHC — Arnulf Quadt, Steffen Korn, and •Marcello Bindi — II. Physikalisches Institut, Georg-August-Universität, Göttingen
By the end of 2025, the ATLAS ID Pixel detector, including its inner Insertable B-Layer (IBL), have integrated up to 2×1015 n-eq cm−2 substantially increasing sensor leakage currents. Since leakage current is a key indicator of detector health and a proxy for particle fluence, its accurate monitoring is essential. Because it is strongly temperature-dependent, simultaneous current and temperature measurements are needed to disentangle thermal effects from true radiation-induced bulk damage. I-V scans provide this information and allow early identification of abnormal currents or breakdown behaviour, which is critical for detector safety. Rising leakage currents affect operations through higher power dissipation, increased noise, and potential power-supply limitations.
This work presents leakage current data for the ATLAS Pixel detector, including results from IBL planar and 3D sensor technologies, before and after normalization to sensor volume and temperature correction. Temperature measurements from NTC thermistors on the hybrid flex are also discussed. All scans were recorded over multiple years in stable detector conditions, either without beam (e.g., winter shutdowns and technical stops) or during collisions alongside charge-collection measurements. A summary of the full Run-3 dataset will be shown, emphasizing the effects of radiation fluence and temperature inhomogeneities across detector layers, staves, and modules.
Keywords: Silicon Detectors; Pixel; Radiation Damage; Particle detectors; LHC