The detector control system of the ATLAS SemiConductor Tracker during macro-assembly and integration

Abdesselam, A.; Barr, A. J.; Basiladze, S.G.; Bates, R. L.; Bell, P. J.; Bingefors, N.; Böhm, J.; Brenner, R.; Llatas, M. Chamizo; Clark, A.; Codispoti, G.; Colijn, A. P.; D’Auria, S.; Dorholt, O.; Doherty, F.; Ferrari, P.; Ferrère, D.; Górnicki, E.; Koperny, S.; Lefèvre, R.; Lindquist, L. E.; Malecki, Pa.; Mikulec, B.; Mohn, B.; Pater, J. R.; Pernegger, H.; Phillips, P. W.; Robichaud-Véronneau, A.; Robinson, D.; Roe, S.; Sandaker, H.; Sfyrla, A.; Stanecka, E.; Šťastný, J.; Viehhauser, G. H. A.; Vossebeld, J. H.; Wells, P. S.

doi:10.1088/1748-0221/3/02/p02007

Cited by 8 publications

(11 citation statements)

References 11 publications

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“…As one can see contribution from hits with χ 2 /ndof > 10 actually degrades the resolution on the mean. 12 Therefore only hits for which χ 2 /ndof is smaller than 10 are selected in order to reach an optimal sensitivity for calibration. Although this may seem to be an unrealistically large value, it already rejects a significant fraction of the segments because multiple scattering effects are ignored.…”

Section: Jinst 3 P08003mentioning

confidence: 99%

Combined performance tests before installation of the ATLAS Semiconductor and Transition Radiation Tracking Detectors

Abat¹,

Abdesselam²,

Addy³

et al. 2008

J. Inst.

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Inner Detector provides charged particle tracking in the centre of the ATLAS experiment at the Large Hadron Collider (LHC). The Inner Detector consists of three subdetectors: the Pixel Detector, the Semiconductor Tracker (SCT), and the Transition Radiation Tracker (TRT). This paper summarizes the tests that were carried out at the final stage of SCT+TRT integration prior to their installation in ATLAS. The combined operation and performance of the SCT and TRT barrel and endcap detectors was investigated through a series of noise tests, and by recording the tracks of cosmic rays. This was a crucial test of hardware and software of the combined tracker detector systems. The results of noise and cross-talk tests on the SCT and TRT in their final assembled configuration, using final readout and supply hardware and software, are reported. The reconstruction and analysis of the recorded cosmic tracks allowed testing of the offline analysis chain and verification of basic tracker performance parameters, such as efficiency and spatial resolution, in combined operation before installation.

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Section: Jinst 3 P08003mentioning

confidence: 99%

Combined performance tests before installation of the ATLAS Semiconductor and Transition Radiation Tracking Detectors

Abat¹,

Abdesselam²,

Addy³

et al. 2008

J. Inst.

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“…The cooling system is interfaced to and monitored by the detector control system, and is operated independently of the status of SCT operation. The SCT detector control system (DCS) [14] operates within the framework of the overall ATLAS DCS [15]. Custom embedded local monitor boards [16], designed to operate in the strong magnetic field and high-radiation environment within ATLAS, provide the interface between the detector hardware and the readout system.…”

Section: Detector Services and Control Systemmentioning

confidence: 99%

Operation and performance of the ATLAS Semiconductor Tracker

Barlow

2013

2013 3rd International Conference on Advancements in Nuclear Instrumentation, Measurement Methods and Their Applications (ANIMM

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The semiconductor tracker is a silicon microstrip detector forming part of the inner tracking system of the ATLAS experiment at the LHC. The operation and performance of the semiconductor tracker during the first years of LHC running are described. More than 99% of the detector modules were operational during this period, with an average intrinsic hit efficiency of (99.74±0.04)%. The evolution of the noise occupancy is discussed, and measurements of the Lorentz angle, δ -ray production and energy loss presented. The alignment of the detector is found to be stable at the few-micron level over long periods of time. Radiation damage measurements, which include the evolution of detector leakage currents, are found to be consistent with predictions and are used in the verification of radiation background simulations. A Estimation of the bulk leakage current using models 52The ATLAS collaboration 57 IntroductionThe ATLAS detector [1] is a multi-purpose apparatus designed to study a wide range of physics processes at the Large Hadron Collider (LHC) [2] at CERN. In addition to measurements of Standard Model processes such as vector-boson and top-quark production, the properties of the newly discovered Higgs boson [3,4] are being investigated and searches are being carried out for as yet undiscovered particles such as those predicted by theories including supersymmetry. All of these studies rely heavily on the excellent performance of the ATLAS inner detector tracking system. The semiconductor tracker (SCT) is a precision silicon microstrip detector which forms an integral part of this tracking system. The ATLAS detector is divided into three main components. A high-precision toroid-field muon spectrometer surrounds electromagnetic and hadronic calorimeters, which in turn surround the inner detector. This comprises three complementary subdetectors: a silicon pixel detector covering radial distances 1 between 50.5 mm and 150 mm, the SCT covering radial distances from 299 mm to 560 mm and a transition radiation tracker (TRT) covering radial distances from 563 mm to 1066 mm. These detectors are surrounded by a superconducting solenoid providing a 2 T axial magnetic field. The layout of the inner detector, showing the SCT together with the pixel detector and transition radiation tracker, is shown in figure 1. The inner detector measures the trajectories of charged particles within the pseudorapidity range |η| < 2.5. It has been designed to provide a transverse momentum resolution, in the plane perpendicular to the beam axis, of 1 ATLAS uses a right-handed coordinate system with its origin at the nominal interaction point in the centre of the detector and the z-axis along the beam-pipe. The x-axis points from the interaction point to the centre of the LHC ring and the y-axis points upwards. Cylindrical coordinates (r, φ ) are used in the transverse plane, φ being the azimuthal angle around the beam-pipe. The pseudorapidity η is defined in terms of the polar angle θ as η = − ln tan(θ /2).-1 -

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“…30 For the support cylinder, the facesheets and core were co-cured in an autoclave using an adhesive film. 31 For the front and rear support, an epoxy film adhesive 32 was used to bond together pre-cured facesheets and the Korex R core. Due to the large size of the panels and cylinder compared to the stock honeycomb sheets size, the honeycomb core was spliced together using an expanding syntactic film.…”

Section: Support Structures 41 Designmentioning

confidence: 99%

“…Sensors for the DCS [32] were placed all over the disks (see [26] for more details). Up to 30 thermistors were placed on each disk: on the exhausts of the cooling circuits, on some locations in the middle of the circuits, on the CFRP disks and on the FSI Jewels (see figure 11).…”

Section: Detector Control System (Dcs)mentioning

confidence: 99%

Engineering for the ATLAS SemiConductor Tracker (SCT) End-cap

Abdesselam¹,

Allport²,

Anderson³

et al. 2008

J. Inst.

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The ATLAS SemiConductor Tracker (SCT) is a silicon-strip tracking detector which forms part of the ATLAS inner detector. The SCT is designed to track charged particles produced in proton-proton collisions at the Large Hadron Collider (LHC) at CERN at an energy of 14 TeV. The tracker is made up of a central barrel and two identical end-caps. The barrel contains 2112 silicon modules, while each end-cap contains 988 modules. The overall tracking performance depends not only on the intrinsic measurement precision of the modules but also on the characteristics of the whole assembly, in particular, the stability and the total material budget. This paper describes the engineering design and construction of the SCT end-caps, which are required to support mechanically the silicon modules, supply services to them and provide a suitable environment within the inner detector. Critical engineering choices are highlighted and innovative solutions are presented-these will be of interest to other builders of large-scale tracking detectors. The SCT end-caps will be fully connected at the start of 2008. Further commissioning will continue, to be ready for proton-proton collision data in 2008. KEYWORDS: Particle tracking detectors; Large detector systems for particle and astroparticle physics; Detector design and construction technologies and materials; Overall mechanics design (support structures and materials, vibration analysis etc).

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The detector control system of the ATLAS SemiConductor Tracker during macro-assembly and integration

Cited by 8 publications

References 11 publications

Combined performance tests before installation of the ATLAS Semiconductor and Transition Radiation Tracking Detectors

Combined performance tests before installation of the ATLAS Semiconductor and Transition Radiation Tracking Detectors

Operation and performance of the ATLAS Semiconductor Tracker

Engineering for the ATLAS SemiConductor Tracker (SCT) End-cap

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