ILC intro

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ILC intro
Links Presentation B. Barish at CERN SPC, Sept.
2005 http//ab-div.web.cern.ch/ab-div/Info/2005/Ba
rishSPC050913.ppt ILC news and
ILC-home http//www.linearcollider.org/newsline/a
rchive/08092005.html ECFA-ILC pages http//www.d
esy.de/conferences/ecfa-lc-study.html Vienna,
ECFA-ILC workshop Nov. 2005 http//wwwhephy.oeaw.
ac.at/p3w/ilc/ws05/ Detector concepts http//phy
sics.uoregon.edu/lc/wwstudy/concepts/ Tizianos
presentation, PH senior staff 23/11/200 http//ph
-dep.web.cern.ch/ph-dep/News/FacultyMtg25Nov05/cam
poresi.pdf
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basic ILC performance aims

• Ecm adjustable from 200 500 GeV (or even down
  to Z0 peak)
• Upgradable to Ecm 1 TeV
• 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

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schematic machine layout
single arm drawn
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Beam Delivery

• 2820 bunches, 300 µm, 300 ns separtion
• bunch train duration 0.9 ms, 5Hz repetition
  rate
• Optional 20 mrad or 2 mrad beam crossing
• 1 or 2 interaction points ?
• gamma-gamma and e-gamma options

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machine bunch parameters
0.9 ms bunch train duration
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main accelerator physics challenges

• Develop High Gradient Superconducting RF systems
• Achieve nm scale beam spots
• Reach Luminosity Requirements

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main machine parameter decisions to be taken
Critical choices luminosity parameters gradient
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global plan (accelerator)
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main detector requirements

• Momentum resolution
• ?(1/p) 4 10-5
• magnetic field, point resolution, track length,
  number of points,
• low density
• Precise EM calorimetry Energy flow in jets
• Jet resolution ?E/E 30/vE
• through particle flow method in fine-grained
  calorimeter
• Efficient B-tagging
• precise vertex detector placed at low radius,
  low density

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the SiD concept

• High field solenoid (5T)
• Vertex (small pixels, e.g. CCD), with timing
• Tracker silicon only, with timing (R1.3 m)
• ECAL SiW
• HCAL optional (Steel, W) with (scint, GEM, RPC)
  with either analog or digital readout

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the SiD concept
vertex detector
tracker
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the LDC concept

• Solenoid (4T)
• Inner tracker pixels silicon
• TPC (200 pad rows, GEM or micromegas), R1.7 m
• ECAL SiW
• HCAL similar to SiD

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the LDC concept
vertextracking
vertical cut LDC
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the GDC concept

• Solenoid (3T)
• Inner tracker pixels silicon
• TPC (gt100 pad rows, GEM or micromegas), R2.1 m
• ECAL Scintillator W
• HCAL Scintillator - W

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the GLD concept
vertical cut GLD
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the 4th concept

• 2 air-coil Solenoids (2T)
• Vertex pixels (5 µm)
• TPC with silicon strips at inner and outer radii,
  R1.4 m
• Calorimeters triple readout fibres
  (scintillation/cherencov/neutron)
• Muon detection ATLAS drift tubes

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main RD activities

• Vertexing
• Small pixels, thin integrated detectors, low
  power
• ? MAPS, DEPFET, CCDs
• Trackers, silicon
• High resolution, low power (pulsed), low
  material, time info
• TPC
• Resolution 80 µm, high density readout, low
  material, low power

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main RD activities

• ECAL/HCAL
• High granularity, small Rmol, high density,
  excellent jet resolution (separation of
  electromagnetic hadronic neutron components)
• ? Silicon-tungsten RD
• ? Scintillator (tile/strip/fiber)

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ILC physics

• e,e- (gamma-gamma and e-gamma) interactions
• Electroweak precision measurements
• Higgs couplings, Higgs spin
• Electroweak symmetry breaking
• SUSY (precision parameters, LHC discovery)
• Extra dimensions, new theories
• Impacts on cosmology (e.g. dark matter)