ATLAS Upgrade Introduction January 2008 M Gilchriese SLHC

ATLAS Upgrade Introduction January 2008 M. Gilchriese

SLHC Topics Not in This Talk • The physics case for the SLHC – See eg. http: //arxiv. org/abs/hep-ph/0204087 v 1 – 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 2 M. Gilchriese

LHC Luminosity? ? Parameter Phase A Phase B Phase C Nominal 43 -156 936 2808 2021 -566 75 25 25 0. 4 -0. 9 0. 5 1. 15 Crossing angle(mrad) 0 250 280 (b*/b*nom) 2 2 1 1 s* (mm, IR 1&5) 32 22 16 16 6 x 1030 -1032 -1033 (1 -2)x 1033 1034 k / no. bunches Bunch spacing (ns) N (1011 protons) L (cm-2 s-1) Year ? (present schedule) Ldt ? (guess) 2008 up to 100 pb-1 2009 1 -few fb-1 2009 -2010 O(10 fb-1) > 2010 O(100 fb-1) Optimistic… 3 12/16/2021 M. Gilchriese 3

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

Monetary Scope – ATLAS/CMS • • • Pixel Cost: SS+LS: Installation: • • 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: 32. 5 – 34. 0 MCHF 105 MCHF (20 MCHF Assembly) 10 MCHF (Mostly ID) 175 -210 ATLAS MCHF EU accounting…. CMS 5 M. Gilchriese

US Costs • Estimate made for P 5/Do. E some time ago. All US SLHC costs. • This is being updated for new P 5 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? ) FY 97/07 FY 07/17 6 M. Gilchriese ATLAS silicon tracking only

SLHC ID “Strawman” Layout Baseline June 07 4 Pixel Layers (Incl. B) 3 Short Strip Layers 2 Long Strip Layers RLS 2 = 950 cm RLS 1 = 750 cm RSS 3 = 600 cm RSS 2 = 490 cm RSS 1 = 380 cm 7 Alternative layouts under study M. Gilchriese

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

Last Slide • Comments – 2010 ish 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 1990 s 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 forthcoming year. Issue; our future roles. 9 M. Gilchriese