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Over the five experiments (ALICE, ATLAS, CMS, LHCb and TOTEM) taking data at the CERN Large Hadron Collider (LHC) more than 28 gas systems are delivering the proper gas mixture to the corresponding detectors. In some cases the use of expensive and/or greenhouse gases cannot be avoided because of physics requirements that impose certain choice on the gas mixture. Typical example is the use of Freon...
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