The data acquisition and calibration system for the ATLAS semiconductor tracker
Journal of Instrumentation 3:1 (2008)
Abstract:
The SemiConductor Tracker (SCT) data acquisition (DAQ) system will calibrate, configure, and control the approximately six million front-end channels of the ATLAS silicon strip detector. It will provide a synchronized bunch-crossing clock to the front-end modules, communicate first-level triggers to the front-end chips, and transfer information about hit strips to the ATLAS high-level trigger system. The system has been used extensively for calibration and quality assurance during SCT barrel and endcap assembly and for performance confirmation tests after transport of the barrels and endcaps to CERN. Operating in data-taking mode, the DAQ has recorded nearly twenty million synchronously-triggered events during commissioning tests including almost a million cosmic ray triggered events. In this paper we describe the components of the data acquisition system, discuss its operation in calibration and data-taking modes and present some detector performance results from these tests. © 2007 IOP Publishing Ltd and SISSA.Alignment of the pixel and SCT modules for the 2004 ATLAS combined test beam
Journal of Instrumentation 3:9 (2008)
Abstract:
A small set of final prototypes of the ATLAS Inner Detector silicon tracking system (Pixel Detector and SemiConductor Tracker), 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 μm in their most precise coordinate. © 2008 IOP Publishing Ltd and SISSA.Combined performance tests before installation of the ATLAS Semiconductor and Transition Radiation Tracking Detectors
JOURNAL OF INSTRUMENTATION 3 (2008) ARTN P08003
The data acquisition and calibration system for the ATLAS Semiconductor Tracker
JOURNAL OF INSTRUMENTATION 3 (2008) ARTN P01003
The integration and engineering of the ATLAS SemiConductor Tracker Barrel
JOURNAL OF INSTRUMENTATION 3 (2008) ARTN P10006