ATLAS upgrades for the high-luminosity LHC

Project leader

Funding source

Swedish Research Council - Vetenskapsrådet (VR)

Project Details

Start date: 01/01/2016
End date: 31/12/2019
Funding: 2384000 SEK


The Large Hadron Collider at CERN (LHC) is the largest and most powerful collider in the world. From 2010-2013 the LHC delivered large volumes of proton-proton and heavy ion collisions to the four experiments around its perimeter. Hundreds of significant physics results have already been published, not the least of which was the 2012 discovery of what appears to be a spin-0 particle consistent with the Standard Model Higgs boson. Over the next decade, the main goal of the LHC is to comprehensively explore the Fermi-mass scale for direct or indirect evidence of new physics. To achieve this, LHC is being upgraded over three long shutdown periods to attain instantaneous luminosities up to five times the nominal design value. Such high luminosities pose serious challenges for ATLAS and the other LHC experiments. With a five-fold luminosity increase, interesting physics events will be overlaid with low-energy particles from hundreds of minimum-bias proton collisions, as well as higher beam-gas interaction rates upstream of the detectors. Radiation levels will also increase proportionately, potentially damaging and/or disturbing the on-detector electronics. Upgrades to the detector and data acquisition system are critical to ensure high-quality physics data at at high luminosity. The work described in this application spans includes upgrade projects within the ATLAS Level-1 Calorimeter Trigger (L1Calo) and hadronic Tile Calorimeter (TileCal) collaborations. Activities within the L1Calo collaboration will include maintenance and development of Stockholm University contributions to the topology upgrade of the Level-1 trigger, as well as providing the initial hadronic calorimeter data readout for three new trigger processor systems to be installed during the Phase-1 upgrade (2018-2019). The major work over the grant period will be will be within the TileCal collaboration, where a complete replacement of the on-detector electronics is planned for Phase-2 (installation 2022-2023) providing full digital readout of all data over high-speed optical links for improved calorimeter trigger performance at high luminosity.

Last updated on 2017-28-07 at 11:23