The LAr cryostats
The basic constituents of the T600 cryostats are the aluminium LAr containers, the thermal insulation and the cooling system. The cryostat is surrounded by a set of passive thermal insulation layers based on honeycomb structure made of Nomex and polyurethane foam panels. The cooling is provided by an external cryogenics system using liquid nitrogen to keep the LAr volume at the stable temperature of about 89K. The cooling pipes transporting the liquid nitrogen are directly inserted into the panel honeycomb structure in case of one half-module. For the second one the solution of cooling shield surrounding the whole cryostat was chosen.