The Optical Alignment System of the ATLAS Muon Spectrometer Endcaps

Aefsky, S.; Amelung, C.; Bensinger, J. R.; Blocker, C.; Dushkin, A.; Gardner, M.; Hashemi, K.; Henry, Erin; Kaplan, B.; Keselman, P; Ketchum, M; Landgraf, U.; Ostapchuk, A.; Rothberg, J.; Schricker, A.; Skvorodnev, N.; Wellenstein, H.

doi:10.1088/1748-0221/3/11/p11005

Cited by 17 publications

(11 citation statements)

References 9 publications

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“…The end-cap chambers and their alignment system [22] were installed and commissioned during 2005-2008, and continuous alignment data-taking with the complete system started in Summer 2008. After commissioning, more than 99% of all alignment sensors were operational, and only a small number failed during the data-taking in 2008.…”

Section: End-cap Chamber Alignmentmentioning

confidence: 99%

Commissioning of the ATLAS Muon Spectrometer with cosmic rays

Aad¹,

Abbott²,

Abdallah³

et al. 2010

Eur. Phys. J. C

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H. von der Schmitt 99 , J. von Loeben 99 , H. von Radziewski 48 , E. von Toerne 20 , V. Vorobel 126 , V. Vorwerk 11 , M. Vos 166 , R. Voss 29 , T.T. Voss 173 , J.H. Vossebeld 73 , N. Vranjes 12a , M. Vranjes Milosavljevic 12a , V. Vrba 125 , M. Vreeswijk 105 , T. Abstract The ATLAS detector at the Large Hadron Col-lider has collected several hundred million cosmic ray events during 2008 and 2009. These data were used to commission the Muon Spectrometer and to study the performance of the trigger and tracking chambers, their alignment, the detector control system, the data acquisition and the analysis programs. We present the performance in the relevant parameters that determine the quality of the muon measurement. We discuss the single element efficiency, resolution and noise rates, the calibration method of the detector response and of the alignment system, the track reconstruction efficiency and the momentum measurement. The results show that the detector is close to the design performance and that the Muon Spectrometer is ready to detect muons produced in high energy proton-proton collisions .

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Section: End-cap Chamber Alignmentmentioning

confidence: 99%

Commissioning of the ATLAS Muon Spectrometer with cosmic rays

Aad¹,

Abbott²,

Abdallah³

et al. 2010

Eur. Phys. J. C

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“…right to connector pads ( Fig.2a) where the signal is transmitted to the front-end electronics via an elastomeric connector, avoiding soldering on the boards. Additionally the outer borders include, among other features, crossmark targets for precision holes (Fig.2c), Rasnik Masks [4] for positioning and dimensions control ( Fig.2b), alignment targets and a HV supply line including space for HV filters per side ( Fig.2e).…”

Section: Anode Board Designmentioning

confidence: 99%

Design, construction and quality control of resistive-Micromegas anode boards for the ATLAS experiment

Kuger

Iengo

2018

EPJ Web Conf.

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For the upcoming upgrade of the forward muon stations of the ATLAS detector, 1280m2 of Micromegas chambers have to be constructed. The industrialization of anode board production is an essential precondition. Design and construction methods of these boards have been optimized towards mass production. In parallel quality control procedures have been developed and established. The first set of large size Micromegas anode boards has finally been produced in industries and demonstrates the feasibility of the project on full-scale.

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“…Two alignment systems [7,8] are provided for the barrel and the endcap chambers, respectively. In the barrel region the alignment is performed via custom RASNIK optical modules, each one containing a camera, a light source, a coded mask and a lens.…”

Section: The Barrel and Endcap Alignment Systemmentioning

confidence: 99%

Design and Performance of the ATLAS Muon Detector Control System

Polini¹

2011

J. Phys.: Conf. Ser.

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Muon detection plays a key role at the Large Hadron Collider. The ATLAS Muon Spectrometer includes Monitored Drift Tubes (MDT) and Cathode Strip Chambers (CSC) for precision momentum measurement in the toroidal magnetic field. Resistive Plate Chambers (RPC) in the barrel region, and Thin Gap Chambers (TGC) in the end-caps, provide the level-1 trigger and a second coordinate used for tracking in conjunction with the MDT. The Detector Control System of each subdetector is required to monitor and safely operate tens of thousand of channels, which are distributed on several subsystems, including low and high voltage power supplies, trigger and front-end electronics, currents and thresholds monitoring, alignment and environmental sensors, gas and electronic infrastructure. The system is also required to provide a level of abstraction for ease of operation as well as expert level actions and detailed analysis of archived data. The hardware architecture and software solutions adopted are shown along with results from the commissioning phase and the routine operation with colliding beams at 3.5 + 3.5 TeV. Design peculiarities of each subsystem and their use to monitor the detector and the accelerator performance are discussed along with the effort for a simple and coherent operation in a running experiment. The material presented can be a base to future test facilities and projects.

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The Optical Alignment System of the ATLAS Muon Spectrometer Endcaps

Cited by 17 publications

References 9 publications

Commissioning of the ATLAS Muon Spectrometer with cosmic rays

Commissioning of the ATLAS Muon Spectrometer with cosmic rays

Design, construction and quality control of resistive-Micromegas anode boards for the ATLAS experiment

Design and Performance of the ATLAS Muon Detector Control System

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