Impact of Cold Noise on the tracking performance of ATLAS ITk short strip barrel modules using a charged particle beam

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Main Authors: Affolder, Tony, Arling, Jan-Hendrik, Astrand, Sten, Benaoumeur, Ilyas, Bucko, Jakub, Cornell, Sergio Diez, Gallop, Bruce Joseph, Ghorbanian, Navid, He, Yajun, Helling, Cole Michael, Hessey, Nigel, Huth, Lennart, Jessiman, Callan, Klein, Christoph Thomas, Keller, John Stakely, Kroll, Jiri, Kvasnicka, Jiri, Mauer, Konstantin, Murphy, Alexandra, Poley, Anne-Luise, Quintero, Dilia Maria Portillo, Phillips, Peter, Privara, Radek, Reoyo, Eduardo Torres, Tuma, Pavel, Warren, Matt
Format: Preprint
Published: 2026
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author Affolder, Tony
Arling, Jan-Hendrik
Astrand, Sten
Benaoumeur, Ilyas
Bucko, Jakub
Cornell, Sergio Diez
Gallop, Bruce Joseph
Ghorbanian, Navid
He, Yajun
Helling, Cole Michael
Hessey, Nigel
Huth, Lennart
Jessiman, Callan
Klein, Christoph Thomas
Keller, John Stakely
Kroll, Jiri
Kvasnicka, Jiri
Mauer, Konstantin
Murphy, Alexandra
Poley, Anne-Luise
Quintero, Dilia Maria Portillo
Phillips, Peter
Privara, Radek
Reoyo, Eduardo Torres
Tuma, Pavel
Warren, Matt
author_facet Affolder, Tony
Arling, Jan-Hendrik
Astrand, Sten
Benaoumeur, Ilyas
Bucko, Jakub
Cornell, Sergio Diez
Gallop, Bruce Joseph
Ghorbanian, Navid
He, Yajun
Helling, Cole Michael
Hessey, Nigel
Huth, Lennart
Jessiman, Callan
Klein, Christoph Thomas
Keller, John Stakely
Kroll, Jiri
Kvasnicka, Jiri
Mauer, Konstantin
Murphy, Alexandra
Poley, Anne-Luise
Quintero, Dilia Maria Portillo
Phillips, Peter
Privara, Radek
Reoyo, Eduardo Torres
Tuma, Pavel
Warren, Matt
contents The inner tracking system of the ATLAS experiment will be upgraded to a full silicon detector in 2030 for HL-LHC. The new tracking system is called ITk, the Inner Tracker. It is required to be operable with efficiency higher than 99\% and noise hit occupancy smaller than 0.1\%. During the pre-production phase of the ITk project, many short-strip modules were observed to exhibit so-called "Cold Noise (CN)", wherein clusters of strips displayed very high noise when the modules were operated at temperatures below~$-35\degree$C. To investigate the CN impact and ensure the quality of module production, huge amount of effort have been put in by the collaboration. This paper focuses on the impact of CN on the tracking performance by examining two short strip modules that exhibit CN: one is non-irradiated, while the other one has been irradiated to the maximum expected end-of-lifetime fluence. For each module, the global and single strip tracking performance are evaluated.
format Preprint
id arxiv_https___arxiv_org_abs_2601_05393
institution arXiv
publishDate 2026
record_format arxiv
spellingShingle Impact of Cold Noise on the tracking performance of ATLAS ITk short strip barrel modules using a charged particle beam
Affolder, Tony
Arling, Jan-Hendrik
Astrand, Sten
Benaoumeur, Ilyas
Bucko, Jakub
Cornell, Sergio Diez
Gallop, Bruce Joseph
Ghorbanian, Navid
He, Yajun
Helling, Cole Michael
Hessey, Nigel
Huth, Lennart
Jessiman, Callan
Klein, Christoph Thomas
Keller, John Stakely
Kroll, Jiri
Kvasnicka, Jiri
Mauer, Konstantin
Murphy, Alexandra
Poley, Anne-Luise
Quintero, Dilia Maria Portillo
Phillips, Peter
Privara, Radek
Reoyo, Eduardo Torres
Tuma, Pavel
Warren, Matt
Instrumentation and Detectors
High Energy Physics - Experiment
The inner tracking system of the ATLAS experiment will be upgraded to a full silicon detector in 2030 for HL-LHC. The new tracking system is called ITk, the Inner Tracker. It is required to be operable with efficiency higher than 99\% and noise hit occupancy smaller than 0.1\%. During the pre-production phase of the ITk project, many short-strip modules were observed to exhibit so-called "Cold Noise (CN)", wherein clusters of strips displayed very high noise when the modules were operated at temperatures below~$-35\degree$C. To investigate the CN impact and ensure the quality of module production, huge amount of effort have been put in by the collaboration. This paper focuses on the impact of CN on the tracking performance by examining two short strip modules that exhibit CN: one is non-irradiated, while the other one has been irradiated to the maximum expected end-of-lifetime fluence. For each module, the global and single strip tracking performance are evaluated.
title Impact of Cold Noise on the tracking performance of ATLAS ITk short strip barrel modules using a charged particle beam
topic Instrumentation and Detectors
High Energy Physics - Experiment
url https://arxiv.org/abs/2601.05393