1. ILC Global Design Effort Barry Barish GDE 9-March-06

2. LCWS06 Bangalore2 Global Design Effort (GDE) On March 18, 2005, during the opening of LCWS05 workshop at Stanford University, I officially accepted the position of Director of the (yet to be formed) GDE

3. 9-March-06LCWS06 Bangalore3 Global Design Effort –The Mission of the GDE Produce a design for the ILC that includes a detailed design concept, performance assessments, reliable international costing, an industrialization plan, siting analysis, as well as detector concepts and scope. Coordinate worldwide prioritized proposal driven R & D efforts (to demonstrate and improve the performance, reduce the costs, attain the required reliability, etc.)

4. 9-March-06LCWS06 Bangalore4 GDE Begins at Snowmass GDE Members Americas 22 Europe 24 Asia 16

5. 9-March-06LCWS06 Bangalore5 Barish - Snowmass Plenary Talk

6. 9-March-06LCWS06 Bangalore6 Designing a Linear Collider Superconducting RF Main Linac

7. 9-March-06LCWS06 Bangalore7 Baseline Configuration Document Our ‘Deliverable’ by the end of 2005 A structured electronic document –Documentation (reports, drawings etc) –Technical specs. –Parameter tables

8. 9-March-06LCWS06 Bangalore8 Structure of the BCD Summary-like overview for those who want to understand the choice and the why Technical documentation of the baseline, for engineers and acc. phys. making studies towards RDR

9. 9-March-06LCWS06 Bangalore9 Alternatives Section(s) Note ACD is part of the BCD

10. 9-March-06LCWS06 Bangalore10 The Key Decisions Critical choices: luminosity parameters & gradient

11. 9-March-06LCWS06 Bangalore11 Making Choices – The Tradeoffs Many decisions are interrelated and require input from several WG/GG groups

12. 9-March-06LCWS06 Bangalore12 Parametric Approach A working space - optimize machine for cost/performance

13. 9-March-06LCWS06 Bangalore13 From Snowmass to a Baseline AugustSeptemberOctoberNovemberDecember 2005 Snowmass WW/GG summaries Response to list of 40+ decisions All documented ‘recommendations available on ILC Website (request community feedback) Review by BCD EC BCD EC publishes ‘strawman’ BCD Public Review Frascati GDE meeting BCD Executive Committee: Barish Dugan, Foster, Takasaki Raubenheimer, Yokoya, Walker

14. 9-March-06LCWS06 Bangalore14 The Baseline Machine (500GeV) not to scale ~30 km e+ undulator @ 150 GeV (~1.2km) x2 R = 955m E = 5 GeV RTML ~1.6km ML ~10km (G = 31.5MV/m) 20mr 2mr BDS 5km

15. 9-March-06LCWS06 Bangalore15 Electron Source Positron-style room- temperature accelerating section diagnostics section standard ILC SCRF modules sub-harmonic bunchers + solenoids laser E=70-100 MeV DC Guns incorporating photocathode illuminated by a Ti: Sapphire drive laser. Long electron microbunches (~2 ns) are bunched in a bunching section Accelerated in a room temperature linac to about 100 MeV and SRF linac to 5 GeV.

16. 9-March-06LCWS06 Bangalore16 Positron Source Primary e - source e - DR Target e - Dump Photon Beam Dump e + DR Auxiliary e - Source Photon Collimators Adiabatic Matching Device e + pre- accelerator ~5GeV 150 GeV100 GeV Helical Undulator In By-Pass Line Photon Target 250 GeV Positron Linac IP Beam Delivery System Keep Alive: This source would have all bunches filled to 10% of nominal intensity. Helical Undulator Based Positron Source with Keep Alive System

17. 9-March-06LCWS06 Bangalore17 ILC Small Damping Ring Multi-Bunch Trains with inter-train gaps

18. 9-March-06LCWS06 Bangalore18 ILC Damping Ring: Baseline Design Positrons: – Two rings of ~6 km circumference in a single tunnel. – Two rings are needed to reduce e- cloud effects unless significant progress can be made with mitigation techniques. – Preferred to 17 km dogbone due to: Space-charge effects Acceptance Tunnel layout (commissioning time, stray fields) Electrons: – One 6 km ring.

19. 9-March-06LCWS06 Bangalore19 Main Linac: SRF Cavity Gradient Cavity type Qualified gradient Operational gradient Length*energy MV/m KmGeV initialTESLA3531.510.6250 upgradeLL4036.0+9.3500 * assuming 75% fill factor Total length of one 500 GeV linac  20km

20. 9-March-06LCWS06 Bangalore20 Cavity: R&D Material R&D: Fine, Large, Single Crystal Fabrication –A number of minor modifications and improvements could be implemented without impact to the basic cavity design. Cavity Preparation Buffer Chemical Processing Cavity Processing (strong R&D needed) –Electro-polishing (EP) System –High Pressure Rinsing (HPR) –Assembly Procedure

21. 9-March-06LCWS06 Bangalore21 Superconducting RF Cavities High Gradient Accelerator 35 MV/meter -- 40 km linear collider

22. 9-March-06LCWS06 Bangalore22 Improved Processing Electropolishing Chemical Polish Electro Polish

23. 9-March-06LCWS06 Bangalore23 RF Power: Modulator Baseline Alternate The Bouncer Compensated Pulse Transformer Style Modulator Operation: an array of capacitors is charged in parallel, discharged in series. (~2m) Will test full prototype in 2006

24. 9-March-06LCWS06 Bangalore24 RF Power: Baseline Klystrons Thales CPI Toshiba Specification: 10MW MBK 1.5ms pulse 65% efficiency

25. 9-March-06LCWS06 Bangalore25 Increase diameter beyond X-FEL Increase diameter beyond X-FEL Review 2-phase pipe size and effect of slope ILC Cryomodule

26. 9-March-06LCWS06 Bangalore26 ILC Beam Delivery System Baseline –two BDSs, 20/2mrad, 2 detectors, 2 longitudinally separated IR halls Alternative 1 –two BDSs, 20/2mrad, 2 detectors in single IR hall @ Z=0 Alternative 2 –single IR/BDS, collider hall long enough for two push-pull detectors

27. 9-March-06LCWS06 Bangalore27 ILC Siting and Conventional Facilities The design is intimately tied to the features of the site –1 tunnels or 2 tunnels? –Deep or shallow? –Laser straight linac or follow earth’s curvature in segments? GDE ILC Design will be done to samples sites in the three regions

28. 9-March-06LCWS06 Bangalore28 The GDE after Six Months How have we done? –We are on track – BCD produced by end of 2005 as promised. It will provide a sound basis for entering into a reference design effort, globally coordinate R&D program, begin industrialization, determine costs, etc. next year What’s Next? –Undertaking Design/Cost effort toward Reference Design Report (RDR) –Assessing present R&D program to begin to provide global guidance in the future.

29. 9-March-06LCWS06 Bangalore29 Next Goal – Reference Design Reorganized the GDE toward Design / Cost Effort A global effort to design / cost the ILC is underway and working Configuration Control; International Costing; Industrialization; Siting -------------------------- A sound design must be established with convincing and affordable costing. Global R&D program to demonstrate the ILC, improve over the baseline and reduce costs.

30. 9-March-06LCWS06 Bangalore30 ICFA FALC Resource Board ILCSC GDE Directorate GDE Executive Committee Global R&D Program RDR Design Matrix GDE R & D Board GDE Change Control Board GDE Design Cost Board GDE RDR / R&D Organization

31. 9-March-06LCWS06 Bangalore31 ICFA FALC Resource Board ILCSC GDE Directorate GDE Executive Committee Global R&D Program RDR Design Matrix GDE R & D Board GDE Change Control Board GDE Design Cost Board GDE RDR / R&D Organization Reporting resourcestechnical

32. 9-March-06LCWS06 Bangalore32 ICFA FALC Resource Board ILCSC GDE Directorate GDE Executive Committee Global R&D Program RDR Design Matrix GDE R & D Board GDE Change Control Board GDE Design Cost Board GDE RDR / R&D Organization GDE

33. 9-March-06LCWS06 Bangalore33 ICFA FALC Resource Board ILCSC GDE Directorate GDE Executive Committee Global R&D Program RDR Design Matrix GDE R & D Board GDE Change Control Board GDE Design Cost Board GDE RDR / R&D Organization ILC Design Effort ILC R&D Program

34. 9-March-06LCWS06 Bangalore34 Technical Systems Vacuum systems Magnet systems Cryomodule Cavity Package RF Power Instrumentation Dumps and Collimators Accelerator Physics Global Systems Commissioning, Operations & Reliability Control System Cryogenics CF&S Installation Area Systems e- e+ damping RTML main BDS source source rings linac Cost Roll-ups

35. 9-March-06LCWS06 Bangalore35 From Baseline to a RDR Jan JulyDec 2006 Freeze Configuration Organize for RDR Bangalore Review Design/Cost Methodology Review Initial Design / Cost Review Final Design / Cost RDR Document Design and CostingPreliminary RDR Released FrascatiVancouverValencia

36. Internationl Linear Collider Timeline 2005 2006 2007 2008 2009 2010 Global Design EffortProject Baseline configuration Reference Design ILC R&D Program Technical Design Expression of Interest to Host International Mgmt

37. 9-March-06LCWS06 Bangalore37 Conclusions The baseline configuration for the ILC has been established and is document in the BCD (a 700+ page electronic document) We have put the BCD under configuration control and are evolving it now in a controlled manner The BCD also defines alternatives and the combination of the baseline and alternative will give good guidance for the ILC R&D program The BCD is now being used as the reference and basis for the reference design / cost effort this year. This is a much tougher job!