[Triumf-seminars] TRIUMF Seminar today at 14:00

TRIUMF Seminars triumf-seminars at lists.triumf.ca
Thu May 23 05:00:00 PDT 2019


Date/Time: Thu 2019-05-23 at 14:00

Location:  Auditorium          

Speaker:   Benoit Lefebvre (TRIUMF)

Title:     New Small Wheels: A major upgrade of the ATLAS experiment for High-Luminosity

Abstract: The instantaneous luminosity of the Large Hadron Collider (LHC) will be gradually increased up to 5 times the design value over the next decade through a series of technical upgrades. The increase in luminosity will improve the discovery potential of ATLAS, one of the main LHC experiments, by increasing the number collisions at the interaction point and the rate of data collection. These upgrades will result in a bonification of the already impressive ATLAS dataset leading to more precise Standard Model measurements and a better sensitivity to Beyond-Standard-Model phenomena. 

The expected increase in collision rate will, however, push the ATLAS trigger system beyond its current capability. In particular, the muon trigger rate is expected to surpass the total ATLAS bandwidth following the High-Luminosity LHC upgrade planned for 2024. As a way to reduce the trigger rate while keeping a good sensitivity to physics processes associated with muons, parts of the ATLAS muon spectrometer will be replaced by the New Small Wheels (NSWs). The detector modules making up the NSWs combine the small-strip Thin Gap Chamber (sTGC) and Micromegas technologies. Both technologies feature a good spatial resolution and stable performances even at high particle rates. These qualities have been demonstrated in a number of past R&D campaigns.

TRIUMF has been a long-standing contributor to the NSW project. The laboratory is currently is responsible for key aspects of sTGC detector manufacturing and took a leadership role in a number of sTGC performance studies.

An overview of the technical and scientific motivations behind this major hardware project will be presented in this talk. The detector technologies, as well as their associated readout chains, will be described. An update of detector and electronics production will also be given.




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General TRIUMF seminar information available at http://www.triumf.ca/home/upcoming-events/about-seminars-lectures



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