Speaker
Description
The ATLAS collaboration is currently preparing to replace the present Inner Detector with the upgraded Inner Tracker (ITk) for Run-IV of the Large Hadron Collider (LHC). In 2022, modules for the central strip tracker were found to have clusters of electrical noise outside specifications when tested at normal operating temperatures (-35°C), dubbed “Cold Noise”. The cause of Cold Noise lies in the interactions of vibrating electronic components with material interfaces and glue chemistry, which requires detailed understanding of all the involved systems that make up an ITk module. Thus, the study of Cold Noise involves topics spanning electronics, mechanics and solid state physics which are applied in parallel. This work probes complex interfacial interactions that can generate electrical signals, effects that are readily picked up by the high sensitivity of modern sensors, acting as a new and unexpected source of noise. This talk presents an overview of our current understanding of the Cold Noise mechanism with recent results focused on surface charge generation, readout, glue properties and structural analysis.
| Keyword-1 | Semiconductor detectors |
|---|---|
| Keyword-2 | Electrical noise |
| Keyword-3 | Particle detectors |