The LUCID detector 
The LUCID detector surrounds the beampipe on both sides of the interaction point at a distance of 17 m.
Each LUCID vessel contains 20 Cherenkov detectors (1.5 m long) consisting of aluminium tubes with
15 mm diameter pointing towards the interaction region.
The gas in the detector is C4F10 at 1.1-1.5 bar pressure. The Cherenkov light is collected in 16 of the tubes at
the back by 15 mm diameter photomultipliers. These photomultipliers have quartz windows to
make them more radiation hard than normal photomultipliers. In 4 of the tubes the light is collected
by a cone and then transmitted by optical quartz fibres to the outside
of the Forward Shielding. Quartz fibres are used since they are more radiation-hard than plastic fibres.
The same type of multi-anode photomultipliers that are used for ALFA will also be used to
read-out the light from the fibers in LUCID and it has been decided to use the same type of
front-end electronics to read-out LUCID as what the Lund group has already developed for ALFA.
Installation of LUCID:
The CERN bulletin ,
ATLAS enews ,
Photos ,
Video .