From ILC to CLIC: Working with Detectors

1
From ILC to CLICWorking with Detectors

• André, Jacob, Katja, Peter

2
Outline

• Beam-Beam Background
• Tracking Detectors
• Particle Flow Algorithms (PFA)
• Hadronic Calorimeter

3
Beam-Beam Background at ILC and CLIC

• Incoherent pairs produced in a single bunch
  crossing (BX)

• Radial position of incoherent pairs. Have to move
  Vertex Detector outward to avoid getting hit.

SiD ECAL
ILD tracking
ILD ECAL
Plots by D. Schulte
4
Beam-Beam Background II

• Different Crossing Angle
• 14 (ILC) to 20 (CLIC) mrad
• Larger Background
• Coherent Pairs (108) ? Larger aperture for
  outgoing beams
• Have to reduce backscattering
• Magnetic Field
• Cant use AntiDID because it lowers Luminosity by
  20

Hits mm-2
Hit distribution on the ILD-flavor VXD from 10 BX
at CLIC
Plots by André Sailer
5
Tracking Detectors

• Increased Beam Beam Background
• Move Vertex Detector Outward
• Still more hits from Background
• Pattern Recognition (B Tagging) might be hurt
• Different Bunch structure (0.5 ns) might require
  time stamping
• Still has to be shown that TPC works, might be
  easier with Silicon Trackers

6
Particle Flow

• For CLIC separation between neutral and charged
  particles is reduced
• Adds Confusion, reduces jet energy resolution

Plot by M. Thomson
7
HCal

• In order to keep a good energy resolution at
  higher energies requires more radiation length in
  the HCal
• To keep it short (Coil diameter) use tungsten (or
  something heavy)
• In the end Particle Flow performance is more
  crucial and not too dependent on HCal resolution,
  but leakage has to be avoided.

Plots by Peter Speckmayer
8
Conclusions

• Both SiD and ILD are being optimized for ILC
• With some changes both concepts can be adapted to
  CLIC
• Still ongoing work at the LCD group at CERN

9
References

• www.ilcild.org
• www.silicondetector.org
• http//lcd.web.cern.ch
• www.linearcollider.org