Abstract
The ATLAS experiment is designed to study the proton-proton collisions produced at the Large Hadron Collider (LHC) at CERN. Liquid argon sampling calorimeters are used for the identification and characteristics measurement of the electrons, photons and hadronic jets. Since the first collisions in 2010, the calorimeters operated almost optimally, playing a leading role in the discovery of the Higgs boson announced in July 2012. A special emphasis in this paper will be given on the latest developments of the high voltage power supply system. These efforts allowed to equip the calorimeters with innovative power supply modules able to temporarily sustain high current load without major voltage drop.
Highlights
HE ATLAS experiment [1] is a multipurpose particle physics detector at the LHC proton-proton collider at CERN
The Liquid Argon (LAr) calorimeter system plays a key role in measuring energy, position and time of electrons, photons and charged hadrons
This signal is processed by front-end boards where it is transmitted through two paths, an analog one is used for the Level 1 calorimeter trigger system, and a digital one which is used for physics reconstruction
Summary
HE ATLAS experiment [1] is a multipurpose particle physics detector at the LHC proton-proton collider at CERN. The detector has a wide physics program, spanning from precision measurements of W± bosons, top and bottom quarks properties, to searches for the Higgs boson and supersymmetric particles
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