View
55
Download
0
Category
Tags:
Preview:
DESCRIPTION
Elementary Particle Physics Experiment: The ATLAS experiment at the LHC. University of Massachusetts, Amherst Graduate Research Orientation 1 Feb 2010. The UMass ATLAS Group. Faculty Ben Brau - LGRT 1032 Carlo Dallapiccola - LGRT 1038 Stephane Willocq - LGRT 1042 Postdoctoral Researchers - PowerPoint PPT Presentation
Citation preview
Feb 1, 2010Feb 1, 2010 Experimental Particle PhysicsExperimental Particle Physics 11
Elementary Particle Physics Experiment:The ATLAS experiment at the LHC
University of Massachusetts, AmherstGraduate Research Orientation
1 Feb 2010
QuickTime™ and aSorenson Video 3 decompressorare needed to see this picture.
Feb 1, 2010Feb 1, 2010 Experimental Particle PhysicsExperimental Particle Physics 22
The UMass ATLAS Group
Faculty– Ben Brau - LGRT 1032
– Carlo Dallapiccola - LGRT 1038
– Stephane Willocq - LGRT 1042
Postdoctoral Researchers– Ed Moyse, Elisa Pueschel, Niels Van Eldik,
Martin Woudstra - CERN
Graduate Students– Andrew Meade, Emily Thompson - CERN
– German Colon, Preema Pais, Tulin Verol - LGRT 1036
Feb 1, 2010Feb 1, 2010 Experimental Particle PhysicsExperimental Particle Physics 33
Experiments can address long standing puzzles / questions:
What are the fundamental constituents of matter?
What are the fundamental forces between elementary
particles?
Can the forces of nature be unified? Including
gravity?
What is the origin of mass?
What is the origin of the matter-antimatter asymmetry
of the Universe?
What is dark matter?
Are there extra dimensions? + many
more…
What is Particle Physics About?
Feb 1, 2010Feb 1, 2010 Experimental Particle PhysicsExperimental Particle Physics 44
How can we answer these Fundamental Questions?
Particle Accelerators– Reach very high collision energies to probe
extremely small distance scales (< 10-18 m)
– Research at the energy frontier (a few TeV) with theATLAS experiment at the Large Hadron Collider (LHC) 10 x higher energy than previous colliders search for
Higgs boson (origin of mass?)
SuperSymmetric particles (dark matter candidate?)
New interactions (heavy gauge bosons, extra dimensions?)
Feb 1, 2010Feb 1, 2010 Experimental Particle PhysicsExperimental Particle Physics 55
The Large Hadron Collider (LHC)Proton-proton collider circumference = 27 km
Energy = 7 TeV / beam√s = 14 TeV
Stored energy / beam = 350 MJ (!)
Bunch spacing = 25 ns 40 MHz crossing rate
Design luminosity= 1034 cm-2 s-1
Number of interactionsper crossing ~23
Collisions expected
in late 2009
Run for ~10-15 years
Lake Geneva
14 TeV
CMSATLAS
CERN Main Site
Feb 1, 2010Feb 1, 2010 Experimental Particle PhysicsExperimental Particle Physics 66
Inner Tracker
EM Calorimeter
Hadronic Calorimeter
Muon Detectors
Diameter 25 mBarrel toroid length 26 mEnd-cap end-wall chamber span 46 mOverall weight 7000 Tons
The ATLAS Detector @ LHC
Feb 1, 2010Feb 1, 2010 Experimental Particle PhysicsExperimental Particle Physics 88
▪▪
November 2005
September 2006August 2006
February 2008
Feb 1, 2010Feb 1, 2010 Experimental Particle PhysicsExperimental Particle Physics 99
ATLAS Data Event
Feb 1, 2010Feb 1, 2010 Experimental Particle PhysicsExperimental Particle Physics 1010
UMass Work on ATLAS
Software development for Muon Spectrometer– Leading muon reconstruction effort
(SW co-coordinator, EM event data model leader)
– Validation of detector description, performance improvements
Physics analysis = Search for new physics– Search for new heavy gauge bosons (new interactions)
– Alternatives to Higgs mechanism (origin of mass)
– Signs of extra (large) dimensions: micro black holes
– Model-Independent: Hints of things we haven’t thought of yet
More information at http://people.umass.edu/eppex/
Feb 1, 2010Feb 1, 2010 Experimental Particle PhysicsExperimental Particle Physics 1111
LHC ScheduleLHC Schedule
First Physics Run at 3.5 GeV on 3.5 GeV begins First Physics Run at 3.5 GeV on 3.5 GeV begins now.now.
Run will continue through 2010 and 2011, with a Run will continue through 2010 and 2011, with a goal luminosity of 1 fbgoal luminosity of 1 fb-1.-1.
All splices will be repaired in a long (~year) All splices will be repaired in a long (~year) shutdown.shutdown.
High-energy 7GeV on 7GeV will begin ~2013.High-energy 7GeV on 7GeV will begin ~2013.
Recommended