DESIGN OF A SCINTILLATOR TILE HADRONIC CALORIMETER FOR THE COMPACT MUON SOLENOID (CMS) EXPERIMENT FOR LHC

The design of a large hadron scintillator tile calorimeter for the CMS experiment has led to novel solutions to maximize compactness. Taking into account important constraints like minimizing space for bindings and clearances, finishing all heavy work before inserting any scintil lator tray, reducing installation time, a solution based on self-suppo rting rings has been preferred. The copper absorber plates are fully e lectron beam welded, creating a rigid self-supporting structure withou t any external frame. This concept has been qualified through prototyp e manufacturing and tests, and a thorough structural analysis. These t est results and the finite element analysis will be presented. The lat ter has been performed to a high degree of accuracy despite the high g ranularity of the ring structure, using a non-standard approach.