NCHEP in Atlas collaboration

The Atlas collaboration unites about 1700 physisists and engineers from 150 scientific organisations of 33 countries. It develops, produces and will exploit the Atlas detector. The main goal of the Atlas detector is to discover and study the Higgs Boson, the particle explaining the mass origin of quarks and leptons. At the same time the broad spectrum of actual problems of modern high energy physics will be explored with its help. Among them are: processes of creation and decay of the top-quark, physics of B-mesons, testing of supersimmetric theory predictions, search for phenomena beyond the Standard Model. Experimental data (processes of creation of secondary particles in proton-proton interactions at 14 TeV energy) will be acquired in frontal collisions of proton beams, accelerated in the ring of the Large Hadron Collider (LHC), which is being built now in the European Laboratory of Nuclear Research (CERN, Geneva).

NC PHEP joined the ATLAS collaboration in 1998. NC PHEP ATLAS-group in close collaboration with colleagues from the Joint Institute of Nuclear Research (JINR, Dubna) participates in development and production of three subsystems of the Atlas detector: hadron calorimeter (Tile-Calorimeter), electromagnetic liquid argon calorimeter (LAr-calorimeter) and muon spectrometer.

The first contriibution to the Atlas project was production of the set of so called intermediate plates, the constituent element of the Tile-Calorimeter autonome module design. The set includes 244800 plates of 12 dimension-types. Sheets of cold-rolled steel Fe-360 with 4.05 mm thickness and 400 x 1620 mm2 dimensions were used as blanks. Typical tolerance requirements were 0.1 mm. Mass-production (by punching) was performed by the Minsk Tractor Plant. The total volume of the metal processed was about 320 tons. The Atlas-group has organized and performed delivery of fabricated

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