ATLAS is an experiment ongoing at CERN to study proton-proton interactions at centre-of-mass energies of up to 14 TeV. During the design and construction phase, the Queen Mary (QMUL) group's commitments have been centred around our expertise in both silicon tracking detectors and calorimetric triggering. Moreover, the QMUL group has built up expertise in optical transmission of both digital and analogue signals and contributes to the commissioning of the hardware as well as to the control, monitoring and test software. In addition to the detector operations and upgrade, the focus is now centred on the analysis of the data from the proton collisions that are being recorded by the ATLAS detector.
ATLAS is the largest of the QMUL PPRC's experimental groups, members are listed here.
ATLAS/QMUL Fridays at 11:00h (GMT); Agenda
The ATLAS group at Queen Mary is actively involved in the study of the top-quark, W/Z with associated heavy and light-flavour jets, Higgs production, and searches for deviations from the standard model at the LHC. The QMUL Particle Physics Research Centre participates in the NPTEV-TQP2020project of the European Union. Queen Mary is also investigating how the understanding of proton structure gained from the electron-proton H1 Experiment at DESY can be applied to the proton-proton ATLAS Experiment. Since a successful physics programme can only be achieved with sufficient understanding and optimisation of the detector performance, since completion of the ATLAS construction we led studies in the inner detector offline alignment, b-quark tagging, tracker calibration, electron and muon identification. Please visit the Documents section on the sidebar for a snapshot of the activities [ATLAS at CERN].
ATLAS Level-1 Calorimeter Trigger
The Queen Mary group is at the heart of the design and commissioning of the ATLAS Level-1 Calorimeter Trigger, a key element of the experiment which must determine which of the 40 million LHC beam crossings per second contains potentially interesting physics and should be read out for further processing. The QMUL group has made major contributions to the architecture and design of the trigger, and is playing a vital role in the online software needed to control, monitor and test this very complex electronic system and to get it working in the ATLAS data acquisition environment. We are also involved in the simulation and design studies for the trigger upgrade. [Further Information]
ATLAS Semiconductor Tracker (SCT)
Our group has contributed in three principal areas of the ATLAS Semiconductor Tracker: the design of silicon detectors capable of withstanding the high radiation environment of LHC, the front-end electronics and the design and construction of modules. Some details can be found here. We have also participated in the design to the overall detector layout, detector optimisation and physics studies. We are now involved in the commissioning and operations of the SCT at CERN, and preparation for the upgrade. In addition, we worked jointly with the ATLAS Inner Detector Software team on the precision internal alignment of the Inner Detectors to derive early alignment constants from cosmics muons and to understand the impact of misalignments on collision data.
We lead the ATLAS Software Infrastructure Team, which is responsible for the building, testing and distributing all ATLAS software releases, and for the software and hardware infrastructure that this involves. We are also jointly responsible for testing the deployment of ATLAS software at the UK Regional Centres. To complement our hardware activities in the SCT, Queen Mary has developed software to mimic the behaviour of the Silicon detectors as charged particles pass through; this is part of the 'Digitisation' process for the Monte Carlo production of simulated ATLAS events.