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ATLAS Upgrade Introduction

Explore the physics case for SLHC, luminosity upgrades, costs breakdown, and project milestones for the ATLAS detector. Compare with CMS, evaluate US involvement, and discuss technical challenges.

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ATLAS Upgrade Introduction

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  1. ATLAS UpgradeIntroduction January 2008

  2. SLHC Topics Not in This Talk • The physics case for the SLHC • See eg. http://arxiv.org/abs/hep-ph/0204087v1 • I would find it interesting to have (not so urgent) a local appraisal of the physics case • Technical issues related to how LHC luminosity is increased to reach SLHC luminosity of 1035 • Upgrades to • Calorimetry • Muons • Trigger, DAQ or computing • Details of tracking upgrade

  3. LHC Luminosity?? Year ? (present schedule) 2008 2009 2009-2010 > 2010  Ldt ? (guess) up to 100 pb-1 1-few fb-1 O(10 fb-1) O(100 fb-1) Optimistic… 9/11/2014 3

  4. Integrated Luminosity vs Time???? 3000 fb-1 300 fb-1 ???? Later ???? L=1035

  5. Monetary Scope – ATLAS/CMS • Pixel Cost: 32.5 – 34.0 MCHF • SS+LS: 105 MCHF (20 MCHF Assembly) • Installation: 10 MCHF (Mostly ID) • Shielding Upgrade: 5 MCHF • LAr Calorimeter: 25.5 MCHF • Tile Calorimeter: 10 MCHF • Muons: 2 MCHF • Trigger/DAQ: 10 MCHF • Electronics: (in the systems) • Total Cost: 175-210 MCHF ATLAS EU accounting…. CMS

  6. US Costs • Estimate made for P5/DoE some time ago. All US SLHC costs. • This is being updated for new P5 panel now. • A useful exercise is to compare to the ATLAS silicon tracking cost for the current detector. These are project costs only. Guess SLHC. • Shift by 10 years. Inflate(4%/yr). Scale(factor 2?) FY97/07 FY07/17 ATLAS silicon tracking only

  7. SLHC ID “Strawman” Layout 4 Pixel Layers (Incl. B) 3 Short Strip Layers 2 Long Strip Layers Baseline June 07 RLS2 = 950 cm RLS1 = 750 cm RSS3 = 600 cm RSS2 = 490 cm RSS1 = 380 cm Alternative layouts under study

  8. ATLAS SLHC Inner Detector Milestones • ATLAS Ready for Beam SLHC 31/12/2015 • ATLAS Upgrade Installation 1/6/2014 31/12/2015 • Prepare for installation 3 month • Installation 10 month • Commissioning 3 month • Closing 2 month • ID Assembly on the Surface 1/1/2013  1/9/2014 • Barrel assembly 1/1/2013 1/4/2014 • EC assembly 1/6/2013  1/9/2014 • Pixel /beam Pipe Assembly 1/9/2013 1/1/2015 • ID Construction PRR Dates 1/4/2010  1/10/2013 • Thermal Components (PRR) 25 /04/2010 • Support structures (PRR) 25/11/2010 • Modules integration (PRR) 21/1/2011 • Sensors (PRR) 12/7/2010 • Readout electronics (PRR) 9/06/2010 • TDR 1/2/2010 • B-layer replacements: • Ready for beam: 1/1/2013 • Beam off – decommissioning 7/1/2012 As set by ATLAS Upgrade management December 2007 Very, very aggressive CMS said to be less aggressive…. PRR= Production Readiness Review Note dates in European format! Note ATLAS ID TDR Was April 1997….

  9. Last Slide • Comments • 2010ish is seen the as time to make a decision to proceed to full-scale construction ie. know about what to build by roughly when.. • LBL led the US work on silicon tracking for the present detector • Number of US institutions involved in SLHC silicon tracking is expected to increase significantly eg. SLAC, BNL, Penn, many others that were not involved in current silicon detector • SLHC upgrades are very challenging technically and, if current milestones are to be met, also schedule/cost. • “Continuous mode” for LHC/SLHC detector design or fabrication or installation from early 1990s through SLHC detector completion 2016 or later. • Obvious difference between LHC and SLHC will be concurrent data analysis and SLHC detector design/fabrication => expand number of groups involved in ID upgrade. • Short presentations this week on current status of local R&D and plans for forthcoming year. Issue; our future roles.

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