Your Search Results

Use this resource - and many more! - in your textbook!

AcademicPub holds over eight million pieces of educational content for you to mix-and-match your way.

Experience the freedom of customizing your course pack with AcademicPub!
Not an educator but still interested in using this content? No problem! Visit our provider's page to contact the publisher and get permission directly.

The aluminization of 600 k WLS fibers for the TileCal/ATLAS/LHC

By: Wemans, A.; Saraiva, J.G.; Patriarca, J.; Maio, A.; Maneira, M.J.P.;

2004 / IEEE

Description

This item was taken from the IEEE Periodical ' The aluminization of 600 k WLS fibers for the TileCal/ATLAS/LHC ' The TILE CALorimeter, the hadronic sampling calorimeter of ATLAS/LHC/CERN, is made of iron and polystyrene scintillating tiles. The light produced in scintillating tiles is absorbed and guided to the photomultipliers (PMTs) through wave length shifter (WLS) optical fibers. To optimize the detection of jets and muons, the top of the fibers away of the PMTs is coated with an aluminum mirror. This aluminum mirror is produced by planar magnetron sputtering. This process adds to an excellent reproducibility a minimal thermal aggression, important for a proper film adhesion to the plastic surface. To satisfy schedule and optical critical requirements, a dedicated mass production machine named SIDELO II was projected and constructed. A reflectivity of R/spl sim/75% is achieved and the light output uniformity improved by /spl sime/10%. The aluminization of the fibers and their quality control started in August 1999 and went on continuously until May 2002. The quality control results showed a reproducibility over the optical characteristics of the fibers that fully accomplish the ATLAS requirements.