RICH

1
RICH

• LHCb RICH
• HPD testing
• Laser Alignment System
• LHCb VELO
• Module reception burn-in tests
• High Voltage System

RICH2
VELO

• Critical Detectors for LHCb Physics
• Example Bs?KK-
• Key Elements
• Particle ID
• Proper-time Resolution

No RICH
38.0 1.2 fs
VELO
RICH
RICH
VeLo
Module reception at CERN
Hybrid Photon Detectors
Modules to be manufactured in the UK and shipped
to CERN.   Aim Determine the integrity of the
module after arriving from the UK.

• Requires
• Visual Inspection of each module.
• Tests on the front end electronics.

HPD testing

• Test, characterise half 550 HPDs manufactured by
  DEP. Populate conditions database
• Test 1 HPD/day
• (18 months) good progress

Burn-in system at CERN
The operation of modules during the experiment
can be compromise by

• Latent manufacturing defects
• Infant mortality of the electronics.
•  
• Aim Uncover by stressing modules under
  experimental conditions.

95 HPDs pass

•  Requires
• Operating modules for 64 hours
• under vacuum (10-6mbar).
• Thermal cycle modules in
• within experiment range
• (-30C to 40C).

RICH2 Laser Alignment

•  Module quality determined by
• Results from tests on its front end electronics
  (Noise,
• pedestal, test-pulse analysis).
• Comparison of before and after thermal
  tomography.