Status of ILC Barry Barish Caltech GDE

Status of ILC Barry Barish Caltech / GDE 17 -Aug-07 LP 07 Daegu, Korea Global Design Effort

The GDE Plan and Schedule 2005 2006 2007 2008 2009 2010 Global Design Effort Baseline configuration Reference Design Project LHC Physics Engineering Design ILC R&D Program Expression of Interest to Host International Mgmt 17 -Aug-07 LP 07 Daegu, Korea Global Design Effort

Parameters for the ILC • Ecm adjustable from 200 – 500 Ge. V • Luminosity ∫Ldt = 500 fb-1 in 4 years • Ability to scan between 200 and 500 Ge. V • Energy stability and precision below 0. 1% • Electron polarization of at least 80% • The machine must be upgradeable to 1 Te. V 17 -Aug-07 LP 07 Daegu, Korea Global Design Effort 3

Designing a Linear Collider Superconducting RF Main Linac 17 -Aug-07 LP 07 Daegu, Korea Global Design Effort 4

RDR ILC Schematic – 11 km SC linacs operating at 31. 5 MV/m for 500 Ge. V – 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 17 -Aug-07 LP 07 Daegu, Korea Global Design Effort 5

Reference Design and Plan Producing Cavities Cavity Shape single cells Obtaining Gradient 17 -Aug-07 LP 07 Daegu, Korea Global Design Effort 6

Cryomodules TESLA cryomodule 17 -Aug-07 LP 07 Daegu, Korea Global Design Effort 4 th generation prototype ILC cryomodule 7

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. 17 -Aug-07 LP 07 Daegu, Korea Global Design Effort 8

Main Linac Double Tunnel – Three RF/cable penetrations every rf unit – Safety crossovers every 500 m – 34 k. V power distribution 17 -Aug-07 LP 07 Daegu, Korea Global Design Effort 9

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 17 -Aug-07 LP 07 Daegu, Korea Global Design Effort 10

Reference Design and Plan Making Positrons 6 km Damping Ring 10 MW Klystrons Beam Delivery and Interaction Point 17 -Aug-07 LP 07 Daegu, Korea Global Design Effort 11

Technically Driven Timeline 2006 2010 Engineer Design BCD RDR 17 -Aug-07 LP 07 Daegu, Korea EDR 2014 2018 Construction Startup Begin Const Global Design Effort End Const August 12

Civil Construction Timeline 17 -Aug-07 LP 07 Daegu, Korea Global Design Effort 13

On-surface Detector Assembly CMS approach 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 17 -Aug-07 LP 07 Daegu, Korea Global Design Effort 14

Technically Driven Timeline 2006 2010 Engineer Design BCD RDR 2014 2018 Construction Startup EDR Begin Const End Const Siting Plan being Developed Site Prep Site Select All regions require ~ 5 yrs 17 -Aug-07 LP 07 Daegu, Korea Global Design Effort August 15

Preconstruction Plan: Fermilab Central Area fits inside the Fermilab boundary ~ Boundary of Fermilab ~ 5. 5 km 17 -Aug-07 LP 07 Daegu, Korea Site Characterization of the Central Area can be done Global Design Effort 16

Technically Driven Timeline 2006 2010 Engineer Design BCD RDR 2014 2018 Construction Startup EDR Begin Const End Const Siting Plan being Developed Site Prep Site Select All regions ~ 5 yrs R & D -- Industrialization 17 -Aug-07 LP 07 Daegu, Korea Global Design Effort August 17

Module Test – Results 17 -Aug-07 LP 07 Daegu, Korea Global Design Effort DESY 18

E Cloud – Results SLAC 17 -Aug-07 LP 07 Daegu, Korea Global Design Effort 19

2009 2012 2015 2018 Schedule in Graphical Form Construction Schedule Cryomodule Production RF System Tests 17 -Aug-07 LP 07 Daegu, Korea Global Design Effort 20

Technically Driven Timeline 2006 2010 Engineer Design BCD RDR 2014 Construction Startup EDR Begin Const Siting Plan being Developed Site Select Site Prep 2018 End Const Detector Construct Detector Install All regions ~ 5 yrs R & D -- Industrialization System Cryomodule Tests August e-Cloud Global Design Effort Full Production & XFEL Gradient 17 -Aug-07 LP 07 Daegu, Korea 21

Detector Concepts 17 -Aug-07 LP 07 Daegu, Korea Global Design Effort 22

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[Ge. V] sin 3/2θ) ○ Material in the tracker ~ 30 times less ○ Track momentum resolution ~ 10 times better Momentum resolution Δp / p 2 = 5 x 10 -5 [Ge. V-1] central region Δp / p 2 = 3 x 10 -5 [Ge. V-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] 17 -Aug-07 LP 07 Daegu, Korea Global Design Effort 23

Concept: one IR - two detectors The concept is evolving and details being worked out may be accessible during run detector A accessible during run Platform for electronic and services (~10*8*8 m). Shielded (~0. 5 m of concrete) from five sides. Moves with detector. Also provide vibration isolation. detector B 17 -Aug-07 LP 07 Daegu, Korea Global Design Effort 24

Technically Driven Timeline 2006 2010 Engineer Design BCD RDR 2014 Construction Startup EDR Begin Const Siting Plan being Developed Site Select Site Prep 2018 All regions ~ 5 yrs End Const Detector Construct Detector Install Pre-Operations R & D -- Industrialization System Cryomodule Tests August e-Cloud Global Design Effort Full Production & XFEL Gradient 17 -Aug-07 LP 07 Daegu, Korea 25

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). 17 -Aug-07 LP 07 Daegu, Korea Global Design Effort 26

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 17 -Aug-07 LP 07 Daegu, Korea Global Design Effort 27