CERN Accelerating science

ATLAS experiment

Chronicles of the ATLAS data taking in 2015

by Alessandro Polini

ATLAS undergone an intense programme of upgrade and maintenance preparing for the Run 2 proton collisions at the previously unattained energy of 13 TeV. 

Three years after the announcement of the discovery of a new particle, the Higgs boson, the ATLAS and CMS Collaborations have recently presented for the first time combined measurements of many of its properties...

LHC experiments upgraded trigger plans

by Panos Charitos

As the LHC prepares for higher energies and luminosities all four experiments have upgraded their triggering to record data more efficiently and make sure that their detectors are ready to find evidence for new physics.

The ATLAS results from PbPb data included a measurement of high-pΤ photons and W mesons, high-precision measurement of jet and charged particle RΑΑ, studies of jet fragmentation, path length dependence of jet quenching, neighbouring jet production and studies of flow and correlations of low pΤ particles. The pPb results included the measurement of Z boson, J/ψ, Ψ(2S), the measurement of jet production and jet fragmentation.

During, the 7th edition of the Hard Probes International Conference series was hosted by McGill University in Montréal, Canada, the LHC experiments presented a wealth of scientific results from heavy-ion collsions at the LHC. 

 We asked the Data Quality Monitoring teams of the four major LHC experiments to present the tools they are using and how the DQM is organized to fit the specifications of each detector.

 LHC experiments have released a portion of its data to the public for use in education and outreach as part of CERN's policy of openness.

LS1 Upgrade of the ATLAS Level-1 Central Trigger Processor

by Thilo Pauly on behalf of the ATLAS Level-1 Central Trigger Team

Thilo Pauly reviews an important upgrade of the ATLAS CTP that included the redesign and rebuilding of its electronic components. 

In the previous issue of the PH Newsletter, we introduced the Run Coordinators of CMS, LHCf, and ALICE. This time, we will get to know the Run Coordinators of ATLAS, TOTEM, and LHCb, who talk about their work and the challenges that they have to face.

ATLAS: Preparing for LHC Run2

by Beniamino Di Girolamo, Technical Coordinator of the ATLAS Collaboration

The ATLAS teams are wrapping things up and prepare for Run 2, as Long Shutdown 1 is coming to an end. The collaboration has made major upgrades to increase the efficiency, safety, and environmental impact of the detector; 2014 was a really busy year.

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