Commissioning and Initial LHC Run-2 operation of the ATLAS minimum bias trigger scintillators
نویسندگان
چکیده
منابع مشابه
Operation of the upgraded ATLAS Central Trigger Processor during the LHC Run 2
The ATLAS Central Trigger Processor (CTP) is responsible for forming the Level-1 trigger decision based on the information from the calorimeter andmuon trigger processors. In order to cope with the increase of luminosity and physics cross-sections in Run 2, several components of this system have been upgraded. In particular, the number of usable trigger inputs and trigger items have been increa...
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The Large Hadron Collider (LHC) at CERN, Geneva, is now starting operation. It will ultimately provide protonproton collisions at a centre-of-mass energy of 14 TeV, a design luminosity of 10 cm−2 s−1 and a bunch-crossing rate of 40 MHz. The ATLAS collaboration has built a general purpose experiment for the LHC which is described in [1][2]. The trigger and data acquisition (T/DAQ) system must wo...
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During the 2013/14 shutdown of the Large Hadron Collider (LHC) the ATLAS first level trigger (L1) and the data acquisition system (DAQ) were substantially upgraded to cope with the increase in luminosity and collision multiplicity, expected to be delivered by the LHC in 2015. Upgrades were performed at both the L1 stage and the single combined subsequent high level trigger (HLT) stage that has ...
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In order to maximize the physics potential of the ATLAS experiment during LHC’s Run 2, the reconstruction software has been updated. Flat computing budgets required a factor of three improved execution time, while the new xAOD data format forced changes in the reconstruction algorithms. Physics performance was also made better. This paper presents an overview of the improvements made to the rec...
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The ATLAS trigger system is based on three levels of event selection that selects the physics of interest from an initial bunch crossing rate of 40 MHz to an output rate of ∼200 Hz compatible with the offline computing power and storage capacity. During nominal LHC operations at a luminosity of 1034 cm−2s−1, decisions must be taken every 25 ns. The LHC is expected to begin operations with a pea...
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ژورنال
عنوان ژورنال: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
سال: 2016
ISSN: 0168-9002
DOI: 10.1016/j.nima.2015.09.053