Technical specification for the procurement of wavelength-shifting fibres for the LHCb calorimeters

For the optics systems of the Electromagnetic (ECAL) and Hadronic (HCAL) Calorimeters of the LHCb Experiment at the future Large Hadron Collider (LHC) at CERN in Geneva Switzerland, large quantities of wavelength-shifting (WLS) fibres will be used. The fibres collect and transmit to photomultiplier tubes the light produced by ionising particles in scintillator tiles. In the ECAL the fibres penetrate the scintillator tiles perpendicularly through holes, while in the HCAL the fibres are running along the edge of a tile. In this document we define the exact quantity and quality of the required WLS fibres, and the delivery schedule

LHCb hadron trigger and Hcal cell size and length optimization

LHCB 99-035 CALO LHCb Hadron Trigger and HCAL Cell Size and Length Optimization R.I.Dzhelyadin, V.F.Obraztsov, O.P.Yushchenko IHEP, Protvino, Russia Abstract: LHCb hadron trigger performance is studied from the points of view of different ECAL-HCAL matching schemes, cell sizes and HCAL length