The optical alignment system of the ATLAS muon spectrometer endcaps

被引：13

作者：

Aefsky, S. ^{[1
]}

Amelung, C. ^{[1
,2
]}

Bensinger, J. ^{[1
]}

Blocker, C. ^{[1
]}

Dushkin, A. ^{[1
]}

Gardner, M. ^{[1
]}

Hashemi, K. ^{[1
]}

Henry, E. ^{[3
]}

Kaplan, B. ^{[1
]}

Keselman, P. ^{[1
]}

Ketchum, M. ^{[1
]}

Landgraf, U. ^{[4
]}

Ostapchuk, A. ^{[5
]}

Rothberg, J. ^{[6
]}

Schricker, A. ^{[1
,2
]}

Skvorodnev, N. ^{[1
]}

Wellenstein, H. ^{[1
]}

机构：

[1] Brandeis Univ, Waltham, MA 02454 USA

[2] CERN, CH-1211 Geneva, Switzerland

[3] Harvard Univ, Cambridge, MA 02138 USA

[4] Univ Freiburg, D-79104 Freiburg, Germany

[5] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany

[6] Univ Washington, Seattle, WA 98195 USA

来源：

JOURNAL OF INSTRUMENTATION | 2008年 / 3卷

关键词：

Large detector systems for particle and astroparticle physics; Detector alignment and calibration methods (lasers; sources; particle-beams);

D O I：

10.1088/1748-0221/3/11/P11005

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The muon spectrometer of the ATLAS detector at the Large Hadron Collider (LHC) at CERN consists of 1182 muon chambers for precision track measurements, arranged in three concentric cylinders in the barrel region, and in four wheels in each of the two endcaps. The endcap wheels are located between 7m and 22m from the interaction point, and have diameters between 13m and 24m. Muon chambers are equipped with a complex optical alignment system to monitor their positions and deformations during ATLAS data-taking. We describe the layout of the endcap part of the alignment system and the design and calibration of the optical sensors, as well as the various software components. About 1% of the system has been subjected to performance tests in the H8 beam line at CERN, and results of these tests are discussed. The installation and commissioning of the full system in the ATLAS cavern has been completed, and the analysis of the first data indicates that it performs already now at a level close to the goal of a 40 mu m alignment accuracy, ultimately required for reconstructing high-momentum final-state muons with the desired momentum resolution of 10% at 1 TeV.

引用

页数：60

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