14 Aug. 2008John Huth Harvard DOE Review Introduction: Harvard ATLAS Group John Huth

14 Aug. 2008John Huth Harvard DOE Review Outline Accelerator status and schedule Detector status and schedule Organization of Harvard ATLAS Group

14 Aug. 2008John Huth Harvard DOE Review An historic moment: Closure of the LHC beam pipe ring on 16 th June (the last piece was the one shown here in ATLAS side A)

14 Aug. 2008John Huth Harvard DOE Review Magnet cooldown status 11 Aug

14 Aug. 2008John Huth Harvard DOE Review Successful synchronization test of clockwise beam Injected for approx. 3 km Aug. 8 Counter-clockwise beams scheduled for 22 Aug

14 Aug. 2008John Huth Harvard DOE Review Accelerator Commissioning Major milestones in ’08 –10 TeV, L = 1E28 to 1E31 est –Clockwise injection 8 Aug. –Counterclockwise injection 22 Aug. –Circulating beams 10 Sept. –Colliding beams 20 October –Run till mid-Dec –Guess of integrated luminosity 1 pb -1 to tape

14 Aug. 2008John Huth Harvard DOE Review Luminosity determination in early running Ultimate accuracy estimated at 5% Source = W,Z cross sections Initial determination from beam parameters Van der Meer scans Instantaneous tracking in LUCID detectors (forward Cerenkov detectors) Estimate accuracy 15-20%

14 Aug. 2008John Huth Harvard DOE Review ATLAS Detector

14 Aug. 2008John Huth Harvard DOE Review Overall Status Magnets working, functional to full field Minor issues being worked on, solved –Shielding of LAr power supplies –Magnetic field mapping –Inner detector cooling –Trigger readout and timing Should be ready with a functional detector for first collisions

14 Aug. 2008John Huth Harvard DOE Review Harvard ATLAS History Joined 1995 –Responsible for MDT (Monitored Drift Tube) electronics design, production –Chamber construction site for endcap muon system –Development of computing model for LHC (Grids) More recently –Muon subsystem installation, commissioning, operations, reconstruction –Physics simulation –Trigger development –Magnetic field mapping –Local computing cluster –Tier 2 facility (w/ BU)

14 Aug. 2008John Huth Harvard DOE Review ATLAS Muon Subsystem

14 Aug. 2008John Huth Harvard DOE Review Personnel Faculty/Scientists –George Brandenburg (retired, consulting) –Melissa Franklin (transitioning from CDF) –Joao Guimaraes da Costa –John Huth –Masahiro Morii (transitioning from BaBar) Postdoctoral scientists –Alberto Belloni –Kevin Black –Corinne Mills –Shulamit Moed

14 Aug. 2008John Huth Harvard DOE Review Personnel (con’t) Graduate students –Lashkar Kashif (Zpt distribution) –Verena Martinez Outschoorn –Srivas Prasad –Ben Smith –Michael Kagan –Laura Jeanty –Chin Lin Wong –Giovanni Zevi Della Porta Technical support –John Oliver (EE) –Sarah Harder (Tech) –Ned Henry (Tech) –Suvendra Dutta (sys-admin) –Steve Sansone (Tech)

14 Aug. 2008John Huth Harvard DOE Review ATLAS Positions Kevin Black – Convener of inclusive lepton subgroup, Muon Commissioning Software Coordinator Alberto Belloni – Muon DAQ Coordinator Joao Guimares – Muon Management Group

14 Aug. 2008John Huth Harvard DOE Review Planned Activities in 09 Muon subsystem commissioning and operations Muon DAQ and online monitoring Muon reconstruction software Physics analysis (Z pt distribution, W’, Z’; top; BSM), participation in “Full Dress Rehearsal” (FDR) Tier 2 Center w/ Boston U Local computing cluster (4096 nodes, 1 PB disk) High-level trigger core software Magnetic field studies

14 Aug. 2008John Huth Harvard DOE Review Backup Slides

14 Aug. 2008John Huth Harvard DOE Review overall commissioning strategy for protons Hardware commissioning Machine checkout Beam commissioning 43 bunch operation 75ns ops 25ns ops I Install Phase II and MKB 25ns ops II Stage A BC No beamBeam D A.Pilot physics run First collisions First collisions 43 bunches, no crossing angle, no squeeze, moderate intensities 43 bunches, no crossing angle, no squeeze, moderate intensities Displace bunches to optimise collisions in the 4 experiments Displace bunches to optimise collisions in the 4 experiments Push performance Push performance Performance limit few cm -2 s -1 (event pileup) Performance limit few cm -2 s -1 (event pileup) B.75ns operation Establish multi-bunch operation, moderate intensities Establish multi-bunch operation, moderate intensities Relaxed machine parameters (squeeze and crossing angle) Relaxed machine parameters (squeeze and crossing angle) Push squeeze and crossing angle Push squeeze and crossing angle Performance limit cm -2 s -1 (event pileup) Performance limit cm -2 s -1 (event pileup) C.25ns operation I Nominal crossing angle Nominal crossing angle Push squeeze Push squeeze Increase intensity to 50% nominal Increase intensity to 50% nominal Performance limit cm -2 s -1 Performance limit cm -2 s -1 D.25ns operation II Push towards nominal performance Push towards nominal performance Courtesy Roger Bailey

14 Aug. 2008John Huth Harvard DOE Review strategy for 2008 and 2009 Hardware commissioning To 5TeV 2008 Machine checkout Beam commissioning 5TeV 43/156 bunch operation Train to 7TeV BC No beamBeam Train to 7TeV Machine checkout Beam Setup 75ns ops25ns ops IShutdown 2009 No beamBeam A Courtesy Roger Bailey

14 Aug. 2008John Huth Harvard DOE Review stage A: 5TeV collisions Approx 30 days of beam to establish first collisions Approx 2 months elapsed –Given optimistic machine availability –Un-squeezed –Low intensity Continue commissioning thereafter –Increased intensity –Squeeze Parameters Rates in 1 and 5 kbkbkbkbN  * 1,5 (m)Luminosity (cm -2 s -1 ) Events/crossing 1 (3) << << << << Courtesy Roger Bailey