Alors, c’est fini!Et maintenant?

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- 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

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

Units are TeV (except WLWL reach) Ldt correspond to 1 year of running at nominal luminosity for 1 experiment

† indirect reach (from precision measurements)

Ellis, Gianotti, ADRhep-ex/0112004+ updates

PROCESS

LHC

14TeV

100 fb-1

SLHC

14TeV

1000 fb-1

SLHC

28TeV

100 fb-1

LinCol

0.8 TeV

500 fb-1

LinCol

5 TeV

100 fb-1

Squarks 2.5 3 4 0.4 2.5

WLWL 2σ 4σ 4.5σ

Z’ 5 6 8 8† 8†

Extra Dim (δ=2) 9 12 15 5 - 8.5† 30 - 55†

q* 6.5 7.5 9.5 0.8 5

Λcomp 30 40 40 100 400

TGC (λγ) 0.0014 0.0006 0.0008 0.0004 0.00008

ILC as N’th Generation e+e- Collider

2010 …

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

LHC ILC

Higgs Event Topology

e+ e– → Z H Z → e+ e–, H → b b

H

ttHWbWbbbljjbbbb

Bkg.

ATLAS

ILC （ e+e-→HZ production ）

Typical numbers

Tagging efficiency~ 30-50 %

S/N > 130fb-1

５００ｆｂ－１

LHC & ILC Higgs Signals

Mh = 120 GeV

• The ILC can measure the spin of any “Higgs” produced

• Measure the energy dependence of the production cross section from threshold

What Kind of “Higgs” is it ?

Measure the quantum numbers. The Higgs is a scalar

Precision Measurement of Higgs Couplings

i im v

SM

“Beyond SM”

ILC Precision

SUSY and Dark Matter

Dark Matter favored regions in cMSSM parameter space

LSP neutralino mass and precision on relic density at LCC1

ILC Reference Design

12

• 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.

A Primary Cost Driver for ILC -- Superconducting RF Technology

Theoretical Limitation on Accelerating Field accE

pH pE

• 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 .

p accE E

pH

p accH E

accE

2 2

2T CM RF Cryplant Cryoop Beampower

Total cost = Tunnel(1 Eacc )+Cryomodul(1 Eacc )+RF(Eacc)+Cryoplant(Eacc ) Cryo-Operation(Eacc ) Beampower(const)

1 =[C +C ] C Eacc + [C C ] Eacc C

Eacc

ILC500 Gradient dependence with tunnel length and cost

20 25 30 35 40 45 5020

25

30

35

40

45

50

ILC500 LT=500E3/(0.7*Eacc)+7

Fill factor=0.7, BDS=7km

Eacc [MV/m]

TESLA

ILC BC

ILC AC(acteptance)

20 25 30 35 40 45 50 55 600.98

1

1.02

1.04

1.06

1.08

1.1

1.12

1.14

1.16

1.18

1.2

Rela

tive C

ost

Eacc [MV/m]

TESLA

ILC BC

ILC AC (acceptance)

Why Aim for Higher Gradient ?

ICHIRO Cavity

Goal ： 51 MV/m

.

• 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.

Light Chemical Polishing Annealing - Degassing

Tests @ TRIUMF