Finite element calculations on rear calorimetermodules for the Zeus experiment

The Zeus detector is developed to study electron-proton collisions at HERA storage ring at DESY in Hamburg. The detector is presently assembled and should be operational early 1991. The interaction point is amongst other things completely surrounded by a calorimeter, that is subdivided in 3 parts: the forward (FCAL), the barrel (BCAL) and the rear calorimeter (RCAL). Both FCAL and RCAL is made of 24 modules, each 200 mm wide, the height is a function of its position and varies between 2.5 and 5 m. The depth of FCAL is about 2 m and for RCAL about 1.5 m. This report describes the results of a series of finite element calculations on the RCAL modules. The main motivation is to find out where in the module the maximum forces and stresses occur under different boundary and load-conditions. Chapters 2-3 give a short description of the module and a short introduction to the finite element methods. Chapters 4-5 describe the calculated loadcases and the resulting forces and stresses. (author). 4 refs.; 44 figs.; 24 tabs