1. Industry and the ILC B Barish 16-Aug-05

2. 12-May-05ILC Consultations - Washington DC2 Why e + e - Collisions? elementary particles well-defined –energy, –angular momentum uses full COM energy produces particles democratically can mostly fully reconstruct events

3. 12-May-05ILC Consultations - Washington DC3 A Rich History as a Powerful Probe

4. 12-May-05ILC Consultations - Washington DC4 The Energy Frontier

5. 12-May-05ILC Consultations - Washington DC5 GLC GLC/NLC Concept The main linacs operate at an unloaded gradient of 65 MV/m, beam-loaded to 50 MV/m. The rf systems for 500 GeV c.m. consist of 4064 75 MW Periodic Permanent Magnet (PPM) klystrons arranged in groups of 8, followed by 2032 SLED-II rf pulse compression systems

6. 12-May-05ILC Consultations - Washington DC6 TESLA Concept The main linacs based on 1.3 GHz superconducting technology operating at 2 K. The cryoplant, is of a size comparable to that of the LHC, consisting of seven subsystems strung along the machines every 5 km.

7. 12-May-05ILC Consultations - Washington DC7 Which Technology to Chose? –Two alternate designs -- “warm” and “cold” had come to the stage where the show stoppers had been eliminated and the concepts were well understood. –A major step toward a new international machine required uniting behind one technology, and then working toward a unified global design based on the recommended technology.

8. 12-May-05ILC Consultations - Washington DC8 Evaluate a Criteria Matrix A panel (ITRP) analyzed the technology choice through studying a matrix having six general categories with specific items under each: –the scope and parameters specified by the ILCSC; –technical issues; –cost issues; –schedule issues; –physics operation issues; –and more general considerations that reflect the impact of the LC on science, technology and society

9. 12-May-05ILC Consultations - Washington DC9 The Recommendation We recommend that the linear collider be based on superconducting rf technology –This recommendation is made with the understanding that we are recommending a technology, not a design. We expect the final design to be developed by a team drawn from the combined warm and cold linear collider communities, taking full advantage of the experience and expertise of both (from the Executive Summary).

10. 12-May-05ILC Consultations - Washington DC10 The 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.)

11. Schedule 2005 2006 2007 2008 2009 2010 Global Design EffortProject Baseline configuration Reference Design ILC R&D Program Technical Design Bids to Host; Site Selection; International Mgmt LHC Physics

12. 12-May-05ILC Consultations - Washington DC12 Starting Point for the GDE Superconducting RF Main Linac

13. 12-May-05ILC Consultations - Washington DC13 Parameters for the ILC E cm 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

14. 12-May-05ILC Consultations - Washington DC14 Cost Breakdown by Subsystem Civil SCRF Linac

15. 12-May-05ILC Consultations - Washington DC15 TESLA Cavity 9-cell 1.3GHz Niobium Cavity Reference design: has not been modified in 10 years ~1m

16. 12-May-05ILC Consultations - Washington DC16 What Gradient to Choose?

17. 12-May-05ILC Consultations - Washington DC17 Gradient Results from KEK-DESY collaboration must reduce spread (need more statistics) single-cell measurements (in nine-cell cavities)

18. 12-May-05ILC Consultations - Washington DC18 (Improve surface quality -- pioneering work done at KEK) BCPEP Several single cell cavities at g > 40 MV/m 4 nine-cell cavities at ~35 MV/m, one at 40 MV/m Theoretical Limit 50 MV/m Electro-polishing

19. 12-May-05ILC Consultations - Washington DC19 How Costs Scale with Gradient? Relative Cost Gradient MV/m 35MV/m is close to optimum Japanese are still pushing for 40- 45MV/m 30 MV/m would give safety margin C. Adolphsen (SLAC)

20. 12-May-05ILC Consultations - Washington DC20 Evolve the Cavities Minor Enhancement Low Loss Design Modification to cavity shape reduces peak B field. (A small Hp/Eacc ratio around 35Oe/(MV/m) must be designed). This generally means a smaller bore radius Trade-offs (Electropolishing, weak cell-to-cell coupling, etc) KEK currently producing prototypes

21. 12-May-05ILC Consultations - Washington DC21 New Cavity Design More radical concepts potentially offer greater benefits. But require time and major new infrastructure to develop. 28 cell Super-structure Re-entrant single-cell achieved 45.7 MV/m Q 0 ~10 10 (Cornell)

22. 12-May-05ILC Consultations - Washington DC22 How and when to involve industry Large Scale Project Characterization –Large Project Management –Precision Engineering –International Coordination Industrialization –Civil Construction & Infrastructure –Cryogenics –Superconducting RF structures, couplers, etc –Electronics and Control Systems –Large Scale Computing