The ATLAS TRT end-cap detectors

Collaboration, The ATLAS; Abat, E.; Addy, T. N.; Åkesson, T. P. A.; Alison, J.; Anghinolfi, F.; Arık, E.; Arık, M.; Атоян, Г.; Auerbach, B.; Baker, O. K.; Banaś, E.; Baron, S.; Bault, C; Becerici, N.; Beddall, A. J.; Bendotti, J.; Benjamin, D.; Bertelsen, H.; Bingül, A.; Blampey, H; Bocci, A.; Bochenek, M; Бондаренко, В. Г.; Bychkov, V.; Callahan, J.; Garrido, M. Capeáns; Sas, L. Cardiel; Catinaccio, A.; Çetin, S. A.; Chandler, T; Chritin, R; Cwetanski, P.; Dam, M.; Danielsson, H. O.; Danilevich, E; David, E.; Degenhardt, J.; Girolamo, B. Di; Dittus, F.; Dixon, N.; Dobos, D.; Dogan, O. B.; Dolgoshein, B. A.; Dressnandt, N.; Driouchi, C; Ebenstein, W. L.; Eerola, P.; Egede, U.; Egorov, K.; Evans, H.; Farthouat, P.; Fedin, O. L.; Fowler, A. J.; Fratina, S.; Froidevaux, D.; Fry, A.; Gagnon, P.; Gavrilenko, I. L.; Gay, C.; Ghodbane, N.; Godlewski, J.; Goulette, M. P.; Gousakov, I; Григалашвили, Н.; Grishkevich, Y. V.; Grognuz, J.; Hajduk, Z.; Hance, M.; Hansen, Frank; Hansen, J. B.; Hansen, J. D.; Hansen, P.; Hare, G. A.; Harvey, Andrew; Hauviller, C.; High, A. A.; Hulsbergen, W. D.; Huta, W.; Issakov, Vadim; Iştin, S.; Jain, V.; Jarlskog, G.; Jeanty, L.; Kantserov, V. A.; Kaplan, B.; Kapliy, A.; Katounine, S; Kayumov, F.; Keener, P. T.; Kekelidze, G. D.; Khabarova, E; Khristachev, A.; Kisielewski, B.; Kittelmann, T.; Kline, C.; Klinkby, E. B.; Klopov, N V; Ko, B. R.; Koffas, T.; Kondratieva, Natalia; Konovalov, S.; Koperny, S.; Korsmo, H.; Kovalenko, S.; Kowalski, T. Z.; Krüger, K.; Kramarenko, V. A.; Кудин, Л.Г.; Bihan, A-C Le; LeGeyt, B. C.; Levterov, Konstantin; Lichard, P.; Lindahl, A.; Lisan, V; Lobastov, S. P.; Loginov, A.; Loh, C. W.; Lokwitz, S; Long, Ming-Ming; Lucas, S.; Lucotte, A.; Luehring, F.; Lundberg, B.; Mackeprang, R.; Maleev, V. P.; Manara, A.; Mandl, Matthew; Martín, A.; Martin, F. F.; Mashinistov, R.; Mayers, G.M.; McFarlane, K. W.; Mialkovski, V.; Mills, Bill; Mindur, B.; Mitsou, V. A.; Mjörnmark, J. U.; Morozov, S. V.; Morris, Eva; Mouraviev, S. V.; Muir, A.; Munar, A.; Nadtochi, A.V.; Nesterov, S. Y.; Newcomer, F. M.; Nikitin, N.; Novgorodova, O.; Novodvorski, E G; Ogren, H.; Oh, S. H.; Олешко, С.Б.; Olivito, D.; Olszowska, J.; Ostrowicz, W.; Passmore, M.S.; Patrichev, S.; Penwell, J.; Perez-Gomez, F; Peshekhonov, V. D.; Petersen, T. C.; Petti, R.; Placci, A.; Poblaguev, A.; Pons, X.; Price, Michael; hne, O Rø; Reece, R.; Reilly, M B; Rembser, C.; Romaniouk, A.; Rousseau, D.; Rust, D. R.; Ryabov, Y. F.; Ryjov, V.; Söderberg, Magnus; Savenkov, A. A.; Saxon, J.; Scandurra, M; Schegelsky, V. A.; Scherzer, M. I.; Schmidt, M. P.; Schmitt, C.; Sedykh, E.; Seliverstov, D. M.; Shin, T.; Shmeleva, A.; Sivoklokov, S. Yu.; Smirnov, S. Yu.; Smirnova, L. N.; Smirnova, O.; Smith, Paul T.; Sosnovtsev, V.; Sprachmann, G; Subramania, S.; Suchkov, S.; Sulin, V. V.; Szczygieł, R.; Tartarelli, G. F.; Thomson, E.; Tikhomirov, V. O.; Tipton, P.; Ferrer, J. A. Valls; Berg, R. Van; Vassilakopoulos, V. I.; Vassilieva, L.; Wagner, P.; Wall, R.; Wang, C; Whittington, D.; Williams, H. H.; Zhelezko, A; Zhukov, K.

doi:10.1088/1748-0221/3/10/p10003

Cited by 31 publications

(7 citation statements)

References 17 publications

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“…The barrel section, where 52,544 straws are aligned parallel to the direction of the beam axis, covers the radial region 560 < r < 1080 mm and the longitudinal region |z| < 712 mm [14]. Two end-cap sections, each with 122,880 straws that are aligned perpendicular to the beam axis and point outwards in the radial direction, cover the regions 644 < r < 1004 mm and 827 < |z| < 2744 mm [15]. The TRT acceptance range is |η| < 2.0.…”

Section: General Descriptionmentioning

confidence: 99%

Performance of the ATLAS Transition Radiation Tracker in Run 1 of the LHC: tracker properties

Aaboud¹,

Berger²,

Burger³

et al. 2017

J. Inst.

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Performance of the ATLAS Transition Radiation Tracker in Run 1 of the LHC: tracker propertiesThe ATLAS CollaborationThe tracking performance parameters of the ATLAS Transition Radiation Tracker (TRT) as part of the ATLAS inner detector are described in this paper for different data-taking conditions in proton-proton, proton-lead and lead-lead collisions at the Large Hadron Collider (LHC). The performance is studied using data collected during the first period of LHC operation (Run 1) and is compared with Monte Carlo simulations. The performance of the TRT, operating with two different gas mixtures (xenon-based and argon-based) and its dependence on the TRT occupancy is presented. These studies show that the tracking performance of the TRT is similar for the two gas mixtures and that a significant contribution to the particle momentum resolution is made by the TRT up to high particle densities.

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Section: General Descriptionmentioning

confidence: 99%

Performance of the ATLAS Transition Radiation Tracker in Run 1 of the LHC: tracker properties

Aaboud¹,

Berger²,

Burger³

et al. 2017

J. Inst.

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“…The TRT [54,55,56] is a straw-tube tracker. Figure 3.7 shows photographs of the TRT barrel and endcap modules.…”

Section: Transition Radiation Trackermentioning

confidence: 99%

Search for Charginos Nearly Mass-Degenerate with the Lightest Neutralino

Kazama¹

2016

Springer Theses

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A search is presented for direct chargino production based on a disappearing-track signature using 20.3 fb −1 of proton-proton collisions at √ s = 8 TeV collected with the ATLAS experiment at the Large Hadron Collider. In anomaly-mediated supersymmetry breaking (AMSB) models, the lightest chargino is nearly massdegenerate with the lightest neutralino and its lifetime is long enough to be detected in the tracking detectors by identifying decays that result in tracks with no associated hits in the outer region of the tracking system. Other supersymmetric models with the pure neutral wino being the lightest supersymmetric particle also predict the same signature. This analysis attains sensitivity for charginos with a lifetime between 0.1 and 10 ns, and significantly surpasses the reach of the LEP experiments due to an enhanced track reconstruction efficiency for charginos having short decay length and a dedicated topological trigger to attain a higher signal efficiency. No significant excess above the background expectation is observed for candidate tracks with large transverse momentum, and constraints on chargino properties are obtained. In the AMSB scenarios, a chargino mass below 270 GeV is excluded at 95% confidence level, which also directly constrains the mass of wino dark matter.

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“…The straws in the barrel region are arranged in three cylindrical layers and 32 φ sectors; they have split anodes and are read out from each side [9]. The straws in the endcap regions are radially oriented and arranged in 80 wheellike modular structures [10]. The TRT straw layout is designed so that charged particles with transverse momentum p T > 0.5 GeV and with pseudorapidity |η| < 2.0 cross typically more than 30 straws.…”

Section: The Atlas Inner Detectormentioning

confidence: 99%

The ATLAS Inner Detector commissioning and calibration

Aad¹,

Abbott²,

Abdallah³

et al. 2010

Eur. Phys. J. C

101

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The ATLAS Inner Detector is a composite tracking system consisting of silicon pixels, silicon strips and straw tubes in a 2 T magnetic field. Its installation was completed in August 2008 and the detector took part in data-taking with single LHC beams and cosmic rays. The initial detector operation, hardware commissioning and insitu calibrations are described. Tracking performance has been measured with 7.6 million cosmic-ray events, collected using a tracking trigger and reconstructed with modular pattern-recognition and fitting software. The intrinsic hit efficiency and tracking trigger efficiencies are close to 100%. Lorentz angle measurements for both electrons and holes, specific energy-loss calibration and transition radiation turn-on measurements have been performed. Different alignment techniques have been used to reconstruct the detector geometry. After the initial alignment, a transverse impact parameter resolution of 22.1 ± 0.9 µm and a relative momentum resolution σ p /p = (4.83 ± 0.16) ×

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The ATLAS TRT end-cap detectors

Cited by 31 publications

References 17 publications

Performance of the ATLAS Transition Radiation Tracker in Run 1 of the LHC: tracker properties

Performance of the ATLAS Transition Radiation Tracker in Run 1 of the LHC: tracker properties

Search for Charginos Nearly Mass-Degenerate with the Lightest Neutralino

The ATLAS Inner Detector commissioning and calibration

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