A Leakage Current-based Measurement of the Radiation Damage in the ATLAS Pixel Detector

TL;DR

This paper measures radiation damage in the ATLAS Pixel Detector using leakage current data, comparing results with models to predict detector lifetime under different operational conditions.

Contribution

It introduces a method to quantify radiation damage via leakage current measurements and compares these with the Hamburg Model predictions.

Findings

Leakage current increases with accumulated radiation exposure.

Results align with Hamburg Model predictions.

Data used to estimate detector lifetime limits.

Abstract

A measurement has been made of the radiation damage incurred by the ATLAS Pixel Detector barrel silicon modules from the beginning of operations through the end of 2012. This translates to hadronic fluence received over the full period of operation at energies up to and including 8 TeV. The measurement is based on a per-module measurement of the silicon sensor leakage current. The results are presented as a function of integrated luminosity and compared to predictions by the Hamburg Model. This information can be used to predict limits on the lifetime of the Pixel Detector due to current, for various operating scenarios.