“…The Compact Muon Solenoid (CMS) experiment at CERN’s most powerful particle accelerator, the Large Hadron Collider (LHC), is a detector where proton-proton collision events are observed and studied by particle physicists. …”
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“…We applied this paradigm to the design and implementation of intelligent data servers in the Compact Muon Solenoid (CMS) data acquisition system at CERN to easily exploiting the physical communication resources of the available equipment. …”
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“…In the 4 T, 12.5 m long, 6 m bore diameter superconducting solenoid for the compact muon solenoid (CMS) experiment at large hadron collider (LHC), the interfaces between the insulation and the conductor or the external cylinder are subjected to high shear forces during the cool down to 4.5 K and the operation phase up to 4 T. …”
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“…The Compact Muon Solenoid (CMS) is one of the general-purpose detectors to be provided for the LHC project at CERN. …”
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“…The Compact Muon Solenoid (CMS) is one of the general-purpose detectors to be provided for the LHC project at CERN. …”
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“…The Compact Muon Solenoid (CMS) is one of the general-purpose detectors to be provided for the LHC project at CERN. …”
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“…Tests of a prototype for the electromagnetic calorimeter (ECAL) of the compact muon solenoid experiment (CMS) at the large hadron collider are described. …”
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“…We present a detailed analysis of the time and the charge signals of a prototype double-gap resistive plate chamber for the endcap region of the Compact Muon Solenoid (CMS) detector at the Large Hadron Collider (LHC). …”
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“…The Compact Muon Solenoid (CMS) experiment at the Large Hadron Collider (LHC) has been collecting data at center-of-mass energy 7 TeV since March 2010. …”
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“…The Electromagnetic Calorimeter (ECAL) of the Compact Muon Solenoid (CMS) experiment at the LHC is a hermetic, fine grained, homogeneous calorimeter, containing 75,848 lead tungstate scintillating crystals. …”
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“…The GEM detectors will be installed at the Compact Muon Solenoid (CMS) experiment during Long Shutdown II of the LHC in 2018. …”
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“…The Pixel Luminosity Telescope (PLT) is one of the newest additions to the Compact Muon Solenoid (CMS) detector for the Large Hadron Collider (LHC) Run II data taking period. …”
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“…The compact muon solenoid (CMS) solenoid is presently the superconducting magnet with the highest stored energy (about 2.6 GJ) and one with the highest energy/mass ratio (11.3 kJ/kg). …”
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“…Thanks to their excellent spatial and time resolution, high particle rate capability and a close to 100% detection efficiency, GEM detectors meet all requirements for the upgrade of the CMS end cap. 144 large area trapezoidal triple-GEM detectors will be installed in 2019 in the first station of the end cap of CMS (Compact Muon Solenoid) experiment at the LHC. The features of the new GEM detectors will bring higher resolution of the muon transverse momentum to the first trigger level, lowering the rates in end cap region. …”
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“…The Compact Muon Solenoid (CMS) experiment at the Large Hadron Collider (LHC) uses distributed grid computing to store, process, and analyse the vast quantity of scientific data recorded every year. …”
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“…The Compact Muon Solenoid (CMS) experiment has implemented a sophisticated two-level online selection system that achieves a rejection factor of nearly $10^5$. …”
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“…We designed, realized, and tested a 2.5-Gb/s optical wireless communication (OWC) system prototype, that should be employed in high energy physics (HEP) experi- ments, such as the compact muon solenoid (CMS). The system consists of off-the-shelf components, mainly a vertical cavity surface emitting laser (VCSEL) and a PIN photodiode with a proper ball lens. …”
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“…In this study a search for third generation scalar leptoquarks using data collected with the Compact Muon Solenoid (CMS) detector at the Large Hadron Collider (LHC) is presented. …”
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“…The purpose of this work is to examine muon reconstruction in the Phase 1 of upgrade of CMS (Compact Muon Solenoid) the detector and compare it to the current geometry at the SLHC (Super Large Hadron Collider) environment. …”
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“…Data collected by the Compact Muon Solenoid experiment at the Large Hadron Collider are continuously analyzed by hundreds of physicists thanks to the CMS Remote Analysis Builder and the CMS global pool, exploiting the resources of the Worldwide LHC Computing Grid.Making an efficient use of such an extensive and expensive system is crucial.Supporting a variety of workflows while preserving efficient resource usage poses special challenges, like: scheduling of jobs in a multicore/pilot model where several single core jobs with an undefined run time run inside pilot jobs with a fixed lifetime; avoiding that too many concurrent reads from same storage push jobs into I/O wait mode making CPU cycles go idle; monitoring user activity to detect low efficiency workflows and provide optimizations, etc.In this contribution we report on two novel complementary approaches adopted in CMS to improve the scheduling efficiency of user analysis jobs: automatic job splitting and automated run time estimates. …”
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