Masking problematic channels in the liquid argon calorimeter for the high-level trigger of ATLAS
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Date
2009-06-02T20:09:12Z
Authors
Taylor, Ryan Paul
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Abstract
Read-out channels in the liquid argon (LAr) calorimeter of the ATLAS detector
are susceptible to various kinds of faults, which can impair the selection of events
made by the trigger system. General-purpose software tools have been developed for
dealing with problematic calorimeter channels. In order to give High-Level Trigger
(HLT) algorithms robustness against detector problems, these tools have been applied
in the HLT calorimeter data preparation code to mask problematic channels in the
LAr calorimeter. Timing measurements and optimizations have been conducted to
assess and minimize the impact of these operations on the execution speed of HLT
algorithms. The efficacy of the bad-channel masking has been demonstrated using
cosmic-ray data.
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Keywords
ATLAS, LHC, calorimeter, trigger