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The Art and Science of Planning for the International Linear Collider Barry Barish Caltech CERN Colloquium 13-Nov-07 Possible TeV Scale Lepton Colliders ILC < 1 TeV Technically possible ~ 2019 ILC QUAD QUAD POWER EXTRACTION STRUCTURE Drive beam - 95 A, 300 ns from 2.4 GeV to 240 MeV CLIC ACCELERATING STRUCTURES Main beam – 1 A, 200 ns from 9 GeV to 1.5 TeV Much R&D Needed • Neutrino Factory R&D + • bunch merging • much more cooling • etc BPM Muon Collider CLIC < 3 TeV Feasibility? ILC + 5-10 yrs Muon Collider < 4 TeV FEASIBILITY?? ILC + 15 yrs? ILC – Global Design Phase 2005 2006 2007 2008 2010 CLIC 2009 Global Design Effort Baseline configuration Reference Design Project LHC Physics Engineering Design ILC R&D Program Expression of Interest to Host International Management Example: Beam Delivery EDR + ‘Deliverables’ Overall tentative schedule to get general idea. Detailed (and more accurate) tables for several systems will be shown ILC Reference Design – 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 Reference Design – Feb 2007 Documented in Reference Design Report RDR Design Parameters Max. Center-of-mass energy Peak Luminosity 500 ~2x1034 GeV 1/cm2s Beam Current 9.0 mA Repetition rate 5 Hz Average accelerating gradient 31.5 MV/m Beam pulse length 0.95 ms 31 km ~230 MW Total Site Length Total AC Power Consumption • • Science 11 January 2008: Vol. 319. no. 5860, p. 142 DOI: 10.1126/science.319.5860.142 News of the Week • PARTICLE PHYSICS: Budget Cuts Mean Layoffs at Two DOE Labs, End for SLAC Collider • Adrian Cho • An unexpectedly tight science budget this year at the U.S. Department of Energy (DOE) will shut down a particle collider in California and curtail activities at another accelerator lab in Illinois. In addition, up to 325 scientists, technicians, and workers are facing layoffs. • • Published online 9 January 2008 | Nature 451, 112-113 (2008) | doi:10.1038/451112a News • Accelerator plans stalled after US and UK cuts • Budget woes spell trouble for International Linear Collider. • The machine on which the world's particle physicists have staked the future of their discipline hangs in the balance owing to budget cuts. • On 18 December, the US Congress passed a spending bill slashing funding for the International Linear Collider (ILC), a 31-kilometre machine to collide electrons with positrons, by three-quarters to just $15 million in 2008, money that has already been spent. MAIS • • Editorial Nature 451, 108 (10 January 2008) | doi:10.1038/451108a; Published online 9 January 2008 • Don't panic • Whether to build the International Linear Collider is an open question, but R&D on it should be supported. • Big science has taken a hit in recent budget cuts both in the United States, where significant lay-offs at Fermilab in Batavia, Illinois, are now threatened, and in the United Kingdom, which is to chop tens of millions of pounds over the next few years from astronomy and high-energy physics (HEP) budgets. In both cases, one significant casualty has been participation in the development of the International Linear Collider (ILC; see page 112), the envisaged successor to CERN's Large Hadron Collider (LHC). The latter has suffered delays; and is not likely to see its first useful collisions until 2009. Time to take stock. Réunion avec Troïka GDE-EDR • GDE et Barry Barish sont en train de se réunir à DESY pour organiser la “résistance” • Mot d’ordre: • On maintient les échéances EDR et ATF2 même si le EDR risque d’être moins épais et ATF2 peut démarrer avec quelques éléments en moins. • Le groupe LAViSta en sera très peu affecté car les aimants FD de ATF2 sont à l’heure et nous faisons surtout de la stabilisation aux spécifs CLIC.