ATLAS at CERN
The ATLAS collaboration involves many institutions worldwide, each of which tend to specialize in a few of the many physics searches being undertaken. Our group is currently focused on Higgs boson measurements in di-tau and WW final states, searches for physics beyond the standard model and quark substructure. The group is strongly involved with general ATLAS computing and ATLAS detector upgrades. The proposal for the Tier-1 data centre at TRIUMF was led by SFU, and the University is hosting a Tier-2 data centre which will provide a data access gateway. Our group is also contributing to several aspects of the ATLAS detector upgrades. For the new ATLAS Inner Tracking detector (ITk), SFU is building ITk silicon-microstrip modules and is developing fully automated ITk module mounting onto the larger ITk detector structures (petals) at TRIUMF.
ATLAS detector upgrades
SFU is active in testing and building new components of ATLAS to maintain and enhance the discovery potential of the experiment during the scheduled LHC operation at much higher collision rates during the High-Luminosity LHC.
New Muon ATLAS New Small Wheel (NSW). The Canadian Foundation for Innovation has supported a consortium from Carleton, McGill, SFU and TRIUMF to replace the present first muon detector station of ATLAS in the forward regions with the so-called New Small Wheels (NSWs). The NSWs are fast, high precision muon tracking detectors with a diameter of approximately 9m (“small” compared to the ATLAS Big Wheels that span about 22m). SFU researchers, together with collaborators from Canada and Israel have successfully tested the first full sized prototype NSW chambers at a beam test experiment at Fermilab in 2014.
New ATLAS Inner Tracker (ITk). The current ATLAS inner tracking detector will have to be replaced. The design of the ITk, is based on high granularity radiation hard silicon-strip and pixels with a total active area of about 180 m2, arranged in pixel and strip barrel layers and six endcap discs. The Canadian Foundation for Innovation has supported a consortium from Toronto, SFU, Carleton, Montreal, York and TRIUMF to contribute about 2 ½ disks for the ITk endcap strip-detector system by 2024. SFU is building about 500 ITk silicon-microstrip modules using infrastructure the group has setup at 4D Labs and is developing fully automated ITk module mounting onto the larger ITk detector structures (petals) at TRIUMF.
Current ATLAS detector impressions: