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Published on December 17, 2007

Author: Waldarrama

Source: authorstream.com

Status of ILC:  Status of ILC Barry Barish Caltech / GDE 17-Aug-07 Slide2:  The GDE Plan and Schedule 2005 2006 2007 2008 2009 2010 Global Design Effort Project Baseline configuration Reference Design ILC R&D Program Engineering Design Expression of Interest to Host International Mgmt LHC Physics Parameters for the ILC:  Parameters for the ILC Ecm adjustable from 200 – 500 GeV Luminosity  ∫Ldt = 500 fb-1 in 4 years Ability to scan between 200 and 500 GeV Energy stability and precision below 0.1% Electron polarization of at least 80% The machine must be upgradeable to 1 TeV Slide4:  Designing a Linear Collider Superconducting RF Main Linac Slide5:  11km SC linacs operating at 31.5 MV/m for 500 GeV Centralized injector Circular damping rings for electrons and positrons Undulator-based positron source Single IR with 14 mrad crossing angle Dual tunnel configuration for safety and availability RDR ILC Schematic Reference Design and Plan:  Reference Design and Plan Producing Cavities Cavity Shape Obtaining Gradient single cells Slide7:  4th generation prototype ILC cryomodule Cryomodules TESLA cryomodule The Main Linac:  The Main Linac Costs have been estimated regionally and can be compared. Understanding differences require detail comparisons – industrial experience, differences in design or technical specifications, labor rates, assumptions regarding quantity discounts, etc. Slide9:  Three RF/cable penetrations every rf unit Safety crossovers every 500 m 34 kV power distribution Main Linac Double Tunnel Conventional Facilities:  Conventional Facilities 72.5 km tunnels ~ 100-150 meters underground 13 major shafts > 9 meter diameter 443 K cu. m. underground excavation: caverns, alcoves, halls 92 surface “buildings”, 52.7 K sq. meters = 567 K sq-ft total Reference Design and Plan:  Reference Design and Plan Making Positrons 6km Damping Ring 10MW Klystrons Beam Delivery and Interaction Point Technically Driven Timeline :  Technically Driven Timeline August BCD Construction  Startup 2006 2010 2014 2018 RDR EDR Begin Const End Const Engineer Design Slide13:  Civil Construction Timeline Slide14:  CMS assembly approach: Assembled on the surface in parallel with underground work Allows pre-commissioning before lowering Lowering using dedicated heavy lifting equipment Potential for big time saving Reduces size of required underground hall On-surface Detector Assembly CMS approach Technically Driven Timeline :  Technically Driven Timeline August BCD All regions require ~ 5 yrs Construction  Startup Siting Plan being Developed 2006 2010 2014 2018 RDR EDR Begin Const End Const Engineer Design Site Prep Site Select Slide16:  ~ 5.5 km ~ 5.5 km Central Area fits inside the Fermilab boundary Site Characterization of the Central Area can be done ~ Boundary of Fermilab Preconstruction Plan: Fermilab Technically Driven Timeline :  Technically Driven Timeline August BCD All regions ~ 5 yrs Construction  Startup Siting Plan being Developed 2006 2010 2014 2018 RDR EDR Begin Const End Const Engineer Design Site Prep Site Select R & D -- Industrialization Module Test – Results:  Module Test – Results DESY E Cloud – Results:  E Cloud – Results SLAC Schedule in Graphical Form:  Schedule in Graphical Form 2009 2012 2015 2018 Construction Schedule Cryomodule Production RF System Tests Technically Driven Timeline :  Technically Driven Timeline August BCD All regions ~ 5 yrs Construction  Startup Siting Plan being Developed 2006 2010 2014 2018 RDR EDR Begin Const End Const Engineer Design Site Prep Site Select R & D -- Industrialization Gradient e-Cloud Cryomodule Full Production System Tests & XFEL Detector Install Detector Construct Slide22:  Detector Concepts Detector Performance Goals:  Detector Performance Goals ILC detector performance requirements and comparison to the LHC detectors: ○ Inner vertex layer ~ 3-6 times closer to IP ○ Vertex pixel size ~ 30 times smaller ○ Vertex detector layer ~ 30 times thinner Impact param resolution Δd = 5 [μm] + 10 [μm] / (p[GeV] sin 3/2θ) ○ Material in the tracker ~ 30 times less ○ Track momentum resolution ~ 10 times better Momentum resolution Δp / p2 = 5 x 10-5 [GeV-1] central region Δp / p2 = 3 x 10-5 [GeV-1] forward region ○ Granularity of EM calorimeter ~ 200 times better Jet energy resolution ΔEjet / Ejet = 0.3 /√Ejet Forward Hermeticity down to θ = 5-10 [mrad] Concept: one IR - two detectors:  may be accessible during run accessible during run Platform for electronic and services (~10*8*8m). Shielded (~0.5m of concrete) from five sides. Moves with detector. Also provide vibration isolation. Concept: one IR - two detectors The concept is evolving and details being worked out detector A Technically Driven Timeline :  Technically Driven Timeline August BCD All regions ~ 5 yrs Construction  Startup Siting Plan being Developed 2006 2010 2014 2018 RDR EDR Begin Const End Const Engineer Design Site Prep Site Select R & D -- Industrialization Gradient e-Cloud Cryomodule Full Production System Tests & XFEL Detector Install Detector Construct Pre-Operations Conclusions - Technical :  Conclusions - Technical The ILC design is proceeding toward an engineering design by 2010. (Goal: Ready to propose construction when LHC results justify). R&D program is being globally coordinated to determine gradient, electron cloud, industrialization, mass production. (Resources are regional, by country and laboratory). Detector R&D also very important to be able to fully exploit the ILC (e.g. spatial & energy resolution) (Needs improved coordination, better regional balance). Achieving our ILC Timeline “The other issues” :  Achieving our ILC Timeline “The other issues” We need to begin a campaign to prepare the way for submitting a winning proposal in about 2010. Science Motivation is very strong, but we need LHC results for validation (~2010) Must convince broader HEP and science communities on the ILC Must engage the global governments to take ownership and develop international governance Must develop a siting strategy The key to maintaining our timeline will be working these issues in parallel with developing an engineering design and completing the R&D

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