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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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slide1

Alors, c’est fini!

Et maintenant?

slide2

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)
indicative physics reach
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)

precision physics at the terascale
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

slide7

Higgs Event Topology

LHC

ILC

e+ e– → Z H

Z → e+ e–, H → b b

slide8

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.

slide9

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
slide10

SM

“Beyond SM”

ILC Precision

Precision Measurement of Higgs Couplings

slide11

SUSY and Dark Matter

LSP neutralino mass and precision on relic density at LCC1

Dark Matter favored regions in cMSSM parameter space

slide14

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.
theoretical limitation on accelerating field
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 .
slide16

Why Aim for Higher Gradient ?

TESLA

ILC BC

Relative Cost

ILC AC (acceptance)

Eacc [MV/m]

ILC500 Gradient dependence with tunnel length and cost

slide18

ICHIRO Cavity

.

Goal: 51 MV/m

slide19

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.