The Cesium source calibration and monitoring system of the ATLAS Tile Calorimeter: design, construction and results

Blanchot, G.; Bosman, M.; Budagov, J.; Cavalli‐Sforza, M.; Efthymiopoulos, I.; Isaev, A. N.; Ivanyushenkov, Y.; Karyukhin, A. N.; Kopikov, S. V.; Nessi, M.; Senko, V.A.; Shalanda, N. A.; Солдатов, М. М.; Solodkov, A. A.; Starchenko, E. A.; Tsoupko‐Sitnikov, V. M.; Vichou, I.; Zaitsev, A. M.

doi:10.1088/1748-0221/15/03/p03017

Cited by 3 publications

(3 citation statements)

References 23 publications

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“…but not the front-end electronics [12]. The laser system monitors the PMTs and front-end electronic components used for collision data.…”

Section: Jinst 18 P06023mentioning

confidence: 99%

“…As can be seen in Equation 2.2, the reconstruction of the energy in TileCal depends on several constants, some of them being updated regularly. The main calibration of the TileCal energy scale is obtained using the caesium system [12]. However, since a caesium scan needs a pause in the 𝑝 𝑝 collisions of at least six hours, this calibration cannot be performed very often.…”

Section: Calibration Proceduresmentioning

confidence: 99%

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Laser calibration of the ATLAS Tile Calorimeter during LHC Run 2

Agaras¹,

Ahmad²,

Boumediene³

et al. 2023

J. Inst.

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This article reports the laser calibration of the hadronic Tile Calorimeter of the ATLAS experiment in the LHC Run 2 data campaign. The upgraded Laser II calibration system is described. The system was commissioned during the first LHC Long Shutdown, exhibiting a stability better than 0.8% for the laser light monitoring. The methods employed to derive the detector calibration factors with data from the laser calibration runs are also detailed. These allowed to correct for the response fluctuations of the 9852 photomultiplier tubes of the Tile Calorimeter with a total uncertainty of 0.5% plus a luminosity-dependent sub-dominant term. Finally, we report the regular monitoring and performance studies using laser events in both standalone runs and during proton collisions. These studies include channel timing and quality inspection, and photomultiplier linearity and response dependence on anode current.

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“…but not the front-end electronics [12]. The laser system monitors the PMTs and front-end electronic components used for collision data.…”

Section: Jinst 18 P06023mentioning

confidence: 99%

Section: Calibration Proceduresmentioning

confidence: 99%

Laser calibration of the ATLAS Tile Calorimeter during LHC Run 2

Agaras¹,

Ahmad²,

Boumediene³

et al. 2023

J. Inst.

Self Cite

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“…There are several aspects that affect its stability, from aging of the scintillators, to stability of the high-voltage supplies and electronics. To monitor all these effects TileCal employs several monitoring and calibration systems [3][4][5]. The calibration and its monitoring is performed using dedicated runs.…”

Section: Calibration Runsmentioning

confidence: 99%

The ATLAS Tile Calorimeter Tools for Data Quality Assessment

Scheirich

System²

2021

EPJ Web Conf.

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The ATLAS Tile Calorimeter (TileCal) is the central part of the hadronic calorimeter of the ATLAS experiment and provides important information for reconstruction of hadrons, jets, hadronic decays of tau leptons and missing transverse energy. The readout is segmented into nearly 10000 channels that are calibrated by means of Cesium source, laser, charge injection, and integratorbased systems. The data quality (DQ) relies on extensive monitoring of both collision and calibration data. Automated checks are performed on a set of pre-defined histograms and results are summarized in dedicated web pages. A set of tools is then used by the operators for further inspection of the acquired data with the goal of spotting the origins of problems or other irregularities. Consequently, the TileCal conditions data (calibration constants, channel statuses etc) are updated in databases that are used for the data-reprocessing, or serve as an important input for the maintenance works during the shutdown periods. This talk reviews the software tools used for the DQ monitoring with emphasis on recent developments aiming to integrate all tools into a single platform.

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Operation and performance of the ATLAS tile calorimeter in LHC Run 2

Aad,

Abbott,

Abdallah

et al. 2024

Eur. Phys. J. C

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The ATLAS tile calorimeter (TileCal) is the hadronic sampling calorimeter covering the central region of the ATLAS detector at the Large Hadron Collider (LHC). This paper gives an overview of the calorimeter’s operation and performance during the years 2015–2018 (Run 2). In this period, ATLAS collected proton–proton collision data at a centre-of-mass energy of 13 TeV and the TileCal was 99.65% efficient for data-taking. The signal reconstruction, the calibration procedures, and the detector operational status are presented. The performance of two ATLAS trigger systems making use of TileCal information, the minimum-bias trigger scintillators and the tile muon trigger, is discussed. Studies of radiation effects allow the degradation of the output signals at the end of the LHC and HL-LHC operations to be estimated. Finally, the TileCal response to isolated muons, hadrons and jets from proton–proton collisions is presented. The energy and time calibration methods performed excellently, resulting in good stability and uniformity of the calorimeter response during Run 2. The setting of the energy scale was performed with an uncertainty of 2%. The results demonstrate that the performance is in accordance with specifications defined in the Technical Design Report.

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The Cesium source calibration and monitoring system of the ATLAS Tile Calorimeter: design, construction and results

Cited by 3 publications

References 23 publications

Laser calibration of the ATLAS Tile Calorimeter during LHC Run 2

Laser calibration of the ATLAS Tile Calorimeter during LHC Run 2

The ATLAS Tile Calorimeter Tools for Data Quality Assessment

Operation and performance of the ATLAS tile calorimeter in LHC Run 2

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