Measurements of sensor radiation damage in the ATLAS inner detector using leakage currents

, ATLAS Collaboration (2021) Measurements of sensor radiation damage in the ATLAS inner detector using leakage currents. Journal of Instrumentation, 16 (8). ISSN 1748-0221

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Abstract

Non-ionizing energy loss causes bulk damage to the silicon sensors of the ATLAS pixel and strip detectors. This damage has important implications for data-taking operations, charged-particle track reconstruction, detector simulations, and physics analysis. This paper presents simulations and measurements of the leakage current in the ATLAS pixel detector and semiconductor tracker as a function of location in the detector and time, using data collected in Run 1 (2010–2012) and Run 2 (2015–2018) of the Large Hadron Collider. The extracted fluence shows a much stronger |z|-dependence in the innermost layers than is seen in simulation. Furthermore, the overall fluence on the second innermost layer is significantly higher than in simulation, with better agreement in layers at higher radii. These measurements are important for validating the simulation models and can be used in part to justify safety factors for future detector designs and interventions. © 2021 CERN for the benefit of the ATLAS collaboration.

Item Type:
Journal Article
Journal or Publication Title:
Journal of Instrumentation
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2600/2610
Subjects:
ID Code:
161554
Deposited By:
Deposited On:
27 Oct 2021 09:25
Refereed?:
Yes
Published?:
Published
Last Modified:
22 Nov 2021 16:50