Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5492865 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2017 | 5 Pages |
Abstract
Compared to Run 1, the LHC beams now provide a higher centre of mass energy (13Â TeV), more bunches with a reduced spacing (25Â ns), and more particles in each bunch leading to very challenging, higher occupancies in the TRT. Significant modifications of the TRT detector have been made for LHC Run 2 mainly to improve response to the expected much higher rate of hits and to mitigate leaks of the Xe-based active gas mixture. The higher rates required changes to the data acquisition system and introduction of validity gate to reject out-of-time hits. Many gas leaks were repaired and the gas system was modified to use a cheaper Ar-based gas mixture in some channels. A likelihood method was introduced to optimise the TRT electron identification.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Instrumentation
Authors
Bartosz Mindur, On behalf of the ATLAS Collaboration On behalf of the ATLAS Collaboration,