The Exploitation and Upgrade of the CMS and LHCb Experiments, Detector R&D and NA62

Lead Research Organisation: University of Bristol
Department Name: Physics

Abstract

The Large Hadron Collider (LHC) is the largest particle accelerator to be built at CERN. It is the highest energy particle accelerator ever built, with a 27 km circumference, 100 m underground, straddling the French and Swiss border outside of Geneva. It will smash together protons travelling at 99.999999% of the speed of light 40 million times per second. With this machine, conditions similar to those a billionth of a second after the Big Bang will be reproduced. The Bristol particle physics group participate in 2 of the major experiments at the LHC, CMS and LHCb. The LHC is a discovery machine. The Standard Model of particle physics has been extremey successful in describing the physics of the Universe to date, but we know it to be incomplete. The Standard Model does not explain dark matter or dark energy, neutrino oscillations, or why the matter left in the universe wasn't destroyed by antimatter created at the big bang. The Standard Model recognizes four forces: electromagnetic force; the weak nuclear force; the strong nuclear force as well as gravity. It is believed that these forces could be different manifestation of something more fundamental. With the highest energies created to date, collisions at the LHC will push forward the frontiers of particle physics where we hope to find new physics particles and processes to explain these phenomenon. The Bristol group will be at the fore of answering these fundamental questions. The physics opportunities demand the development of novel sensors, detector systems and advanced computing techniques. These developments are at the cutting edge of technology. The Bristol group will be at the forefront in developing these systems for future experiments but also ensuring the knowledge generated will be transferred to the wider economy for enhanced productivity and economic growth.

Publications

10 25 50
 
Description The LHC has dominated the field during the review period, starting in 2009 after around fifteen years of preparation. The group made major contributions to the design, construction and commissioning of the CMS experiment. Bristol physicists have played a leading role in early data taking at CMS, with a significant contribution to several analyses, as well as taking on a number of roles within physics management. The group's physics programme encompasses both Standard Model measurements and searches for new physics in 'conventional' and 'exotic' channels. The group successfully targeted a number of analyses designed to make use of the early data in 2010, and has continued to provide leadership in these areas whilst also turning towards higher luminosity studies with systematic limitations. Group members also play a wider role in the scrutiny of CMS output, serving in numerous formal analysis review and editorial roles. Flavour physics has unique sensitivity to physics beyond the Standard Model (BSM). BSM particles can affect quark flavour changes through loop processes. Crucially, there is no kinematic cut-off for the masses inside the loops. This approach is therefore sensitive to new particles far heavier than those directly produced at even the highest-energy colliders - it allows us to see beyond the energy frontier. The more precisely we measure these processes, the further we can see. TheFlavour Physics group therefore had a comprehensive programme of beauty, charm and kaon physics at the precision frontier.

The group has significant expertise in solid-state tracking detectors, both silicon and diamond, and has developed the infrastructure and skills to play a major role in the advancement of this technology. In this programme we have capitalised on Bristol's strengths in electronics and mechanical design, and have also begun new activities with gas ionisation sensors optimised for low cost and robustness. We exploit opportunities to contribute to future projects and upgrades of existing experiments, and to transfer particle physics technology to industry, the public sector, and other academic disciplines.
Exploitation Route Collaboration with Diamond Detectors Limited, to design and produce a very fast, diamond based spectroscopy system. This system will have significantly improved radiation hardness and count rates over existing detectors. It makes use of detector and readout technologies developed both in industry and within the group, and will open new markets in the medical, security and energy sectors.

Development of a muon tomography system for the detection of illicit Special Nuclear Materials, in conjunction with the Atomic Weapons Establishment. The fine-pitch RPC technology developed is under study for several other industrial applications.

The use of Grid computing technology in the modelling and economic impact assessment of landslides in developing countries.
Sectors Aerospace, Defence and Marine,Electronics,Pharmaceuticals and Medical Biotechnology,Other

 
Description CASE studentships. optimisation of mass storage systems & structural stability of lightweight carbon fibre structures with RAL. Development of a very fast, diamond based spectroscopy device) Diamond Detectors Ltd (DDL), Poole. Muon topography (AWE)
First Year Of Impact 2011
Sector Aerospace, Defence and Marine,Electronics,Energy,Pharmaceuticals and Medical Biotechnology,Other
Impact Types Societal,Economic

 
Description A large-area detector for precision time-of-flight measurements
Amount € 2,696,000 (EUR)
Funding ID 291175 
Organisation European Research Council (ERC) 
Sector Public
Country Belgium
Start 06/2012 
End 06/2016
 
Description Upgrades of the Tracker and Trigger of the CMS experiment at the CERN LHC
Amount £1,135,033 (GBP)
Funding ID ST/K003216/1 
Organisation Science and Technologies Facilities Council (STFC) 
Sector Public
Country United Kingdom
Start 04/2013 
End 04/2017
 
Title Grid 
Description Development of Grid computing tools to enable handling of large datasets 
Type Of Material Improvements to research infrastructure 
Year Produced 2012 
Provided To Others? Yes  
Impact Ongoing activity 
URL http://mossaic.org
 
Title Metadata 
Description Developments with using CouchDB 
Type Of Material Data handling & control 
Year Produced 2010 
Provided To Others? Yes  
Impact ongoing 
URL http://mossaic.org
 
Description CMS 
Organisation European Organization for Nuclear Research (CERN)
Department Compact Muon Solenoid (CMS)
Country Switzerland 
Sector Public 
PI Contribution Shared analysis and detector contributions
Collaborator Contribution Shared analysis and detector contributions
Impact see publication list
 
Description LHCb 
Organisation European Organization for Nuclear Research (CERN)
Department Large Hadron Collider Beauty Experiment (LHCb)
Country Switzerland 
Sector Public 
PI Contribution Scientific collaboration
Collaborator Contribution Shared analysis and building on experiment
Impact see list of papers
Start Year 2006
 
Description NA62 
Organisation European Organization for Nuclear Research (CERN)
Department NA62 Rare Kaon-Decay Experiment
Country Switzerland 
Sector Academic/University 
PI Contribution Detector development
Collaborator Contribution Detector development & analysis
Impact http://na62.web.cern.ch/NA62/Documents/ReferenceDocuments.html
Start Year 2008