Industry and the ILC B Barish 16-Aug-05

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

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

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

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 MW Periodic Permanent Magnet (PPM) klystrons arranged in groups of 8, followed by 2032 SLED-II rf pulse compression systems

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.

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.

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

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).

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.)

Schedule Global Design EffortProject Baseline configuration Reference Design ILC R&D Program Technical Design Bids to Host; Site Selection; International Mgmt LHC Physics

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

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

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

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

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

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)

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

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 MV/m 30 MV/m would give safety margin C. Adolphsen (SLAC)

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

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)

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