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LHC GPD Upgrade Status and Plans

This article provides an overview of the current status and future plans for the LHC GPD upgrade project, including the major developments, schedule, and scope of the upgrades for ATLAS and CMS detectors.

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LHC GPD Upgrade Status and Plans

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  1. LHC GPD Upgrade Status and Plans Dan Tovey University of Sheffield 1

  2. Introduction • Aim is to achieve an ultimate integrated luminosity for each of ATLAS and CMS of 3000fb-1 by 2030. • GPDs aim to exploit fully the additional luminosity • Increased search reach • Improved precision measurements of SM and New Physics • Access to new channels and new measurements • Requires major upgrades / replacements in both LHC and the experiments • Sub-systems must cope with increased radiation dose and pile-up • Experiments must remain fully functional for 20 years • Here: brief incremental summary of major (Intl/UK) developments in past year • Not intended to be a first-principles justification for the projects • Many thanks to ATLAS-UK and CMS-UK colleagues for input. 2

  3. Major Developments 2009/10 • 20 Nov – 23 Dec : • First physics run at √s = 900 GeV (few hours √s = 2.36 TeV) • 16 Dec- 28 Feb: • Winter technical stop • Since 30 March: • LHC running at √s = 7 TeV • First results shown at summer conferences (PLHC, ICHEP etc.) • Already excellent progress in understanding detectors and rediscovering SM 3

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  6. Major Developments 2009/10 • 25-29 Jan 2010, Chamonix: LHC Performance Workshop • Preliminary reassessment of LHC performance projections + schedule post start-up. • Post Chamonix • Task forces studying options for machine upgrades • Experiments studying impact on upgrade schedules in close contact with machine • June 2010 • CERN Management presents current upgrade planning to SPC / Council • Open meeting presenting plan to community: http://indico.cern.ch/conferenceDisplay.py?confId=95580 6

  7. Current Schedule • GPD upgrade programme driven by three major shutdowns • Phase-0: 2012 – early 2013, ~15 months duration, ~1 fb-1 accumulated • Machine: finish splice repairs, commissioning for ~ 7 TeV • ATLAS: consolidation and installation of a new forward beam pipe • CMS: consolidation and installation of forward muon systems • Phase-1: 2016 +/- 1yr (tbd), ~12 months duration?, 30-50 fb-1 accum. • Machine: LINAC4 + collimation installed to give ~2x1034cm-2s-1 (twice nominal) • ATLAS: IBL and AFP installation, trigger upgrades, muon upgrades • CMS: Install new beam pipe, pixels, trigger, HCAL photodetectors • Phase-2: 2020 – mid 2021, 18-20 months duration, 300-400 fb-1 accum. • Machine: new IR quadrupoles and final focus to give 5x1034 cm-2s-1 with luminosity levelling to optimise beam lifetime and integrated luminosity. • ATLAS: Replacement tracker, DAQ, trigger upgrades, mini-FCAL? • CMS: Replacement tracker, electronics • NB date includes 1-2 year safety margin for machine tech development 7

  8. CMS Upgrade Scope Agreed at the May 2008 Upgrades Workshop http://indico.cern.ch/conferenceDisplay.py?confId=28746 2015 2012 2015 2012 /2015 2015 Jordan Nash, SLHC Open Meeting, 23 rd June 2010 8

  9. UK CMS Upgrade planning NB Physics driven, as well as based on technical expertise Geoff Hall 9 • Timescales to be consistent with overall CMS plans • see Jordan Nash presentations • Major deliverables are still in definition phase but are expected to include important contributions to • Phase I pixel replacement ~2015/2016 • L1 trigger both Phase I and II • Phase II tracker • which will follow from R&D activities presently underway • funded until 2012/2013 • Financial commitments likely to be a proportionate share of overall CMS upgrade costs • including proper allowance for staff effort and common fund for infrastructure • UK is ~5% of CMS G Hall PPAP July 2010 9

  10. UK strengths in CMS Geoff Hall 10 • Significant expertise and past CMS experience in • ASIC design and general electronics expertise • High speed digital hardware design • Firmware • Online software (+ computing & offline almost self-evident!) • with good external collaborations in all areas, as well as within UK • R&D activities • Simulations of tracker and trigger design • Phase II tracker readout system (CBC ASIC and off-detector hardware) • High bandwidth and speed FPGA-based trigger processor hardware, where prototypes are similar (5-10 Gbps data links, processing) to Tracker requirements • These will provide foundations for Phase I requests • A possible interest for Phase I is pixel module assembly • Profit from sub-detector assembly experience G Hall PPAP July 2010 10

  11. Summary of ATLAS Schedule http://atlas.web.cern.ch/Atlas/GROUPS/UPGRADES/ 11

  12. ATLAS-UK Upgrade Status • Phase-2 upgrades (esp. replacement tracker) required for 2020 installation • Much harsher environment  greater demands • New system, much greater complexity, detector area, data rates, numbers of channels, radiation tolerance requirements • Experience suggests ten years only just sufficient to complete R&D and prototyping, construct, integrate and install • ATLAS-UK phase-2 tracker upgrade R&D project 2007-10 • New “ATLAS Upgrade” project bid submitted to PPRP Oct 2009 • Phase-2 tracker (pixels and strips) pre-production and prototyping, plus: • Construction of 420 m detectors (ATLAS-FP) • Construction of new Phase-1 B-layer (IBL) • Phase-1 & 2 trigger upgrades (L1Calo, L1Track, HLT) • Software/computing development for Phase-1/2 • PPRP Visiting Panels Dec 2009 / Jan 2010 • Awaiting decision from STFC  bridging funds • Long-term: UK ~10% ATLAS  aim for similar contribution to upgrade and associated physics programme 12

  13. ATLAS-FP • Detect centrally / diffractively produced objects via forward proton tagging • Hamburg pipe allows sensors close to beam Steve Watts 13

  14. ATLAS-FP • What do we have to do for AFP ?? • Finish R&D. FE-I4 based tracker. • (benefits from Pixel R&D). • Build a pre-production Hamburg Pipe • and tracker. • Start production – need • TP/TDR approval. Steve Watts 14

  15. ATLAS IBL • Improves ATLAS vertexing • Backup in case of problems with current b-layers • TDR being prepared (in mature state) • Add new b-layer around a smaller beam pipe, stave structure, 160 MHz readout, CO2 cooling Existing b-layer • UK leads post-irradiation and test-beam studies of the two front-running pixel technologies: planar and 3D silicon. • Synergy with phase-2 pixel programme ATLAS New b-layer 15

  16. ATLAS Phase-2 Tracker • Layout proposal under study • Pixels at small radii, strips further out • UK leadership on short strip module and overall tracker optimisation • Stave geometry in barrel (petals in forward region) • UK also proposing to contribute to forward pixel disks • Builds on pixel expertise • Further areas of UK leadership include: • Sensors • Irradiation • Modules and Mechanics • Cooling • Opto-electronics and DAQ • UK vital to success of project 16

  17. Stave: Hybrids glued to Sensors glued to Bus Tape glued to Cooling Substrate Glue Glue 1.2m 1.2m 1.2m 17

  18. ATLAS Phase-2 Tracker: Radiation At inner pixel radii - target survival to 1-2×1016 neq/cm2 For strips 3000fb-1 ×2 implies survival required up to 1 – 1.3×1014 neq/cm2 18

  19. ATLAS Trigger • Vital to improve rejection in presence of heavy pile-up • Phase-1: • Improved L1Calo using event topological information • HLT upgraded to use FTK output (hw tracking at L1.5 + further sw & farms optimisation • Phase-2: • L1Calo receives digital read-out, finer granularity, improved topology • New L1Track trigger  requires close contact with tracker development • Further HLT sw & farms optimisation L1Track system layout L1Calo system layout w/ topo processor 19

  20. ATLAS Computing Upgrades • Parallelism • Memory optimization • Event level parallelism • Job level parallelism/hyperthreading • Pinning • UK leads Inner Detector upgrade simulation (first to be ready) • UK leads radiation environment simulation • Motivations: • Requirements for the other Upgrade projects • Growing scale of ATLAS computing with data • Evolving Computing technology • Drivers • Increasing CPU need • Increasing memory demands per processor • Increasing bandwidth through processor • Organization • UK led activity areas • Near-term optimization • Longer term parallelization • Code for upgrade detector simulation • Code for large pile-up • Realistic radiation environment • Vital underway R&D for future work: • CPU,GPUAPU • Tracking code on Fermi GPU, trigger code test example • Close co-operation with NVidia 48 core Single Chip Cloud Dec 09 20

  21. Conclusions • Many developments in past year: • Scientific: LHC is running! • Schedule: response to machine developments (but not as great as some might have thought) • Funding: New bids, STFC uncertainty • Technological: better understanding of challenges and solutions • Scientific case unchanged • Continuing STFC support crucial for future of energy frontier PP in UK. 21

  22. General Purpose Detectors 22

  23. n-in-p Planar FZ Irradiations 900V Strip Doses 500V Pixel Doses 23 23

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