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Alors, c’est fini! Et maintenant?

Alors, c’est fini! Et maintenant?. Machine Upgrade in Stages. Push LHC performance without new hardware luminosity →2.3x10 34 cm -2 s -1 , E b =7→7.54 TeV LHC IR upgrade replace low- b quadrupoles after ~7 years peak luminosity →4.6x10 34 cm -2 s -1 LHC injector upgrade

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Alors, c’est fini! Et maintenant?

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  1. Alors, c’est fini! Et maintenant?

  2. Machine Upgrade in Stages • Push LHC performance without new hardware • luminosity →2.3x1034 cm-2s-1, Eb=7→7.54 TeV • LHC IR upgrade • replace low-b quadrupoles after ~7 years • peak luminosity →4.6x1034 cm-2s-1 • LHC injector upgrade • peak luminosity →9.2x1034 cm-2s-1 • LHC energy upgrade • Eb→13 – 21 TeV (15 → 24 T dipole magnets)

  3. Indicative Physics Reach Ellis, Gianotti, ADR hep-ex/0112004+ updates Units are TeV (except WLWL reach) Ldt correspond to 1 year of running at nominal luminosity for 1 experiment Approximate mass reach machines: s = 14 TeV, L=1034 (LHC) : up to  6.5 TeV s = 14 TeV, L=1035 (SLHC) : up to  8 TeV s = 28 TeV, L=1034 : up to  10 TeV † indirect reach (from precision measurements)

  4. ILC as N’th Generation e+e- Collider 2010 …

  5. Precision Physics at the Terascale Elementary particles Well-defined energy angular momentum Uses full CoM energy Produces particles democratically Can mostly fully reconstruct events Need to know what energy is interesting

  6. Higgs Event Topology LHC ILC e+ e– → Z H Z → e+ e–, H → b b

  7. LHC & ILC Higgs Signals ５００ｆｂ－１ H  Typical numbers Tagging efficiency ~ 30-50 % S/N > 1 ILC（e+e-→HZ production） ttHWbWbbblnjjbbbb ATLAS 30fb-1 Bkg.

  8. Mh = 120 GeV What Kind of “Higgs” is it ? Measure the quantum numbers. The Higgs is a scalar • The ILC can measure the spin of any “Higgs” produced • Measure the energy dependence of the production cross section from threshold

  9. SM “Beyond SM” ILC Precision Precision Measurement of Higgs Couplings

  10. SUSY and Dark Matter LSP neutralino mass and precision on relic density at LCC1 Dark Matter favored regions in cMSSM parameter space

  11. ILC Reference Design 12

  12. A Primary Cost Driver for ILC -- Superconducting RF Technology • Basic element of the technology is a nine-cell 1.3 GHz niobium cavity. • Approximately 160 of these cavities have been fabricated by industry as part of R&D program at DESY.

  13. Theoretical Limitation on Accelerating Field • Type II Superconductor can support a magnetic field before quench. • Formerly optimized to control field emission. Cf. TESLA • New surface treatments stop field emission from being limitation. • Allow optimization of for highest .

  14. Why Aim for Higher Gradient ? TESLA ILC BC Relative Cost ILC AC (acceptance) Eacc [MV/m] ILC500 Gradient dependence with tunnel length and cost

  15. ICHIRO Cavity . Goal： 51 MV/m

  16. Light Chemical Polishing Annealing - Degassing • Light Chemical Polishing (CP) HF(46%) : HNO3(60%) : H3PO4(85%) 1 :1 : 1 in volume • CP for 1 minute at 25 OC. • Removal thickness = 10 μm. • Prepare smooth surface before EP. • Annealing/Degassing in furnace • 750 OC for 3 hours • Degassing of hydrogen important. • Temperature and time optimized for cavity softness and cost.

  17. Tests @ TRIUMF

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