ECAL-CMS Project: Anti Vibration Cage for Transporting Electromagnetic Calorimeter Modules from C.R. Casaccia (Rome) to CERN (Geneva)

Abstract eng:
A protective anti vibration cage have been developed by ENEA to protect delicate instrumentation and goods of art from vibrations and shocks induced by natural or mechanical events like earthquake or transportation. The anti vibration cage has been used to transport very delicate crystals within the ECAL-CMS experiment. The Compact Muon Solenoid (CMS) is a detector for the Large Hadron Collider (LHC) at the CERN laboratory of Geneva. The Electromagnetic Calorimeter (ECAL) inside the CMS is an ensemble of modules made by special crystals of Led-Tungstate. These modules have been assembled in two regional centres located at the CERN laboratory of Geneva, Switzerland, and at the ENEA laboratories of the R.C. CASACCIA, Rome, Italy, where the crystals have been tested and assembled in special modules. At the end of the assembling process the modules have been delivered at CERN to be packed and installed in the ECAL configuration. Once assembled, the modules must be very carefully handled to avoid any undesired shock or vibration which could cause relative motions between crystals. The target design of the protection system in the transportation tool is to maximize the isolation of the module from any vibration source, both inside the regional Centre and during the transportation from the Casaccia Regional Centre the CERN.

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