Alignment of the Pixel and SCT Modules for the 2004 ATLAS Combined Test Beam

Details Alignment of the Pixel and SCT Modules for the 2004 ATLAS Combined Test Beam Alignment of the Pixel and SCT Modules for the 2004 ATLAS Combined Test Beam

2008-05-26

arxiv.org/abs/0805.3984v1

JINST 3:P09004,2008

Physics

Instrumentation and Detectors

22 pages, submitted to JINST, 129 authors

Scientific paper

10.1088/1748-0221/3/09/P09004

A small set of final prototypes of the ATLAS Inner Detector silicon tracker (Pixel and SCT) were used to take data during the 2004 Combined Test Beam. Data were collected from runs with beams of different flavour (electrons, pions, muons and photons) with a momentum range of 2 to 180 GeV/c. Four independent methods were used to align the silicon modules. The corrections obtained were validated using the known momenta of the beam particles and were shown to yield consistent results among the different alignment approaches. From the residual distributions, it is concluded that the precision attained in the alignment of the silicon modules is of the order of 5 micrometers in their most precise coordinate.

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