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ABSTRACT
ALICE (A Large Ion Collider Experiment) is one of seven detector experiments at the Large
Hadron Collider at CERN. ALICE is optimized to study heavy-ion (Pb-Pb nuclei) collisions at a
centre of mass energy of 2.76 TeV per nucleon pair.
Here we describe the design, the construction, the commissioning and the operation of
the Data Acquisition (DAQ) system of the ALICE experiment in detail. The DAQ is the systems
used respectively for the acquisition of all physics data and for the overall control of the
experiment. It is the computing system that made of hundreds of PCs and data storage units
interconnected via two networks. The collection of experimental data from the detectors is
performed by several hundreds of high-speed optical links. The ALICE data acquisition system
needs to balance its capacity to record the steady stream of very large events resulting from
central collisions, with an ability to select and record rare cross-section processes. The core
function of the Data Acquisition (DAQ) system is to realize the data- 鍖 ow from the detector up
to the data storage. The DAQ system also includes software packages performing the data
quality monitoring and the system performance monitoring.
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Abstract

  • 1. ABSTRACT ALICE (A Large Ion Collider Experiment) is one of seven detector experiments at the Large Hadron Collider at CERN. ALICE is optimized to study heavy-ion (Pb-Pb nuclei) collisions at a centre of mass energy of 2.76 TeV per nucleon pair. Here we describe the design, the construction, the commissioning and the operation of the Data Acquisition (DAQ) system of the ALICE experiment in detail. The DAQ is the systems used respectively for the acquisition of all physics data and for the overall control of the experiment. It is the computing system that made of hundreds of PCs and data storage units interconnected via two networks. The collection of experimental data from the detectors is performed by several hundreds of high-speed optical links. The ALICE data acquisition system needs to balance its capacity to record the steady stream of very large events resulting from central collisions, with an ability to select and record rare cross-section processes. The core function of the Data Acquisition (DAQ) system is to realize the data- 鍖 ow from the detector up to the data storage. The DAQ system also includes software packages performing the data quality monitoring and the system performance monitoring.