Cathode Strip Chambers in ATLAS: Installation, Commissioning and <i>in Situ</i> Performance

Argyropoulos, Theodoros; Assamagan, K.; Benedict, B. H.; Chernyatin, V.; Cheu, E.; Deng, J.; Gordeev, A.; Eschrich, I.; Grachev, Vadim; Johns, K.; Junnarkar, S.; Kandasamy, A.; Khodinov, A.; Lankford, A. J.; Lei, X.; Garcia, R. Murillo; Nikolopoulos, K.; O’Connor, P.; Parnell-Lampen, C.; Park, W.; Polychronakos, V.; Porter, R.; Purohit, M.; Schernau, M.; Toggerson, B.; Tompkins, D.

doi:10.1109/tns.2009.2020861

Cited by 10 publications

(6 citation statements)

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“…The MDTs provide a spatial resolution of 35 µm. In addition, the high occupancy region 2.0 < η < 2.7 is covered by Cathode Strip Chambers (CSC) [85], which are multi-wire proportional chambers, with the cathodes segmented into strips. The CSCs can achieve a spatial resolution of 60 µm in the r direction and 5 mm in the φ direction.…”

Section: Muon Spectrometermentioning

confidence: 99%

Search for Higgs Boson Decays to Charm Quarks with the ATLAS Experiment and Development of Novel Silicon Pixel Detectors

Mironova

2023

Springer Theses

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The coupling of the Higgs boson to the third generation of fermions and heavy vector bosons has been experimentally well-established at the Large Hadron Collider (LHC), and the measured properties agree well with Standard Model (SM) expectation. Evidence of the Higgs coupling to second-generation quarks is still elusive, and measurements of Higgs boson decays to c -quarks are the next most promising decay mode to probe the validity of the SM. This thesis describes a search for H → c c decays in the V H production mode, using a p p collision dataset with an integrated luminosity of 139 fb −1 at a center-of-mass energy of 13 TeV, collected with the ATLAS detector. The analysis includes three different channels based on the decay of the vector boson and uses dedicated machine learning algorithms to identify c -quarks in the experiment. The observed (expected) upper limit for the V H (H → c c ) process is 26 (31 +12 −8 ) times the predicted Standard Model cross-section times branching fraction, at the 95% confidence level, and a direct constraint on the Higgs-charm coupling modifier of |κ c | < 8.5 is set. In a combination of this analysis with a measurement of the V H (H → b b ) process an upper limit of |κ c /κ b | < 4.5 is determined.Significant analysis improvements and a larger dataset are needed to observe H → c c decays in the future. At the High-Luminosity LHC (HL-LHC), the ATLAS detector will collect at least 3000 fb −1 of integrated luminosity over ten years, which requires significant improvements to the detector to cope with increased radiation damage and higher data rates. This thesis discusses the characterisation of the ATLAS pixel detector readout chip for the inner detector upgrade (ITk) for HL-LHC. The radiation tolerance of the chip is tested in irradiations using X-rays and protons. All readout chip components, such as the digital logic and analogue front-end, are sufficiently radiation-tolerant to withstand the 1 Grad total ionising dose expected at HL-LHC.Finally, the thesis describes monolithic pixel detectors as a possible technology for future pixel detectors and summarises the characterisation of a monolithic detector prototype in an X-ray beam test.the RD53A quad modules assembled at Oxford and worked on thermal stress studies on RD53A dual-chip modules. This work is not described in this thesis.ITk Simulation I contributed to the simulation of the ITk detector, used in many physics and performance studies for the upgrade. In particular, I worked on the migration of the pixel detector geometry to a different, more maintainable framework (GeoModelXML). This work is not described in this thesis. 'soft term'-related longitudinal(transverse) resolution uncertainty MET_SoftTrk_Scale 'soft term'-related scale uncertainty MET_JetTrk_Scale E miss T,Trk scale uncertainty τ reconstruction TAUS_TRUEHADTAU_SME_TES_DETECTOR Tau energy scale uncertainty: single-particle response + threshold TAUS_TRUEHADTAU_SME_TES_INSITU Tau energy scale uncertainty: total from in-situ measurement TAUS_TRUEHADTAU_SME_TES...

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Section: Muon Spectrometermentioning

confidence: 99%

Search for Higgs Boson Decays to Charm Quarks with the ATLAS Experiment and Development of Novel Silicon Pixel Detectors

Mironova

2023

Springer Theses

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“…Both TGC and RPC provide very fast signals for muon hits, and can therefore be used in the ATLAS trigger system to select events containing muons. There are also Muon Drift Tubes [58], which are used over most of the η range, and Cathode Strip Chambers [59], which are used in the range 2 < |η| < 2.7. These provide track measurements with high spatial resolution.…”

Section: Muon Spectrometersmentioning

confidence: 99%

Search for Dark Matter Produced in Association with a Higgs Boson Decaying to Two Bottom Quarks at ATLAS

Cheng

2017

Springer Theses

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“…To overcome the dependence of the position resolution on the incidence angle [18] several strategies could be followed. In case enough space is available, one could tilt the chambers in order to minimize the mean incidence angle [19]. Alternatively, the gas gap width could be decreased to the absolutely operational minimum, albeit with possible effect on the reconstruction efficiency.…”

Section: Micromegas As µ-Tpcmentioning

confidence: 99%

The ATLAS muon Micromegas R&D project: towards large-size chambers for the s-LHC

et al. 2009

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The ATLAS muon Micromegas R&D project: towards large-size chambers for the s-LHC ABSTRACT: Detectors based on the bulk-Micromegas technology exhibit position resolution better than 100 µm at counting rates of up to several tens of kHz/cm 2 , along with trigger capabilities. These characteristics, combined with the detector's mechanical robustness and the possibility for cost-effective industrial production, makes them a promising candidate for the ATLAS Muon Spectrometer upgrade in a future luminosity enhancement of the LHC. The R&D project status will be presented together with the obtained results in the effort to define the baseline system specifications.

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Cathode Strip Chambers in ATLAS: Installation, Commissioning and in Situ Performance

Cited by 10 publications

References 10 publications

Search for Higgs Boson Decays to Charm Quarks with the ATLAS Experiment and Development of Novel Silicon Pixel Detectors

Search for Higgs Boson Decays to Charm Quarks with the ATLAS Experiment and Development of Novel Silicon Pixel Detectors

Search for Dark Matter Produced in Association with a Higgs Boson Decaying to Two Bottom Quarks at ATLAS

The ATLAS muon Micromegas R&D project: towards large-size chambers for the s-LHC

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