Design of a Large Scale Prototype for a SiW Electromagnetic Calorimeter for the ILC - EUDET Module

Abstract : The CALICE collaboration is preparing large scale prototypes for highly granular calorimeters for detectors to be operated at the International Linear Collider, ILC. During the year 2009 a prototype of a SiW electromagnetic calorimeter will be assembled which in terms of dimensions and layout meets already most of the requirements given by the ILC Physics Program and hence the detector design. In particular the Very Front End electronics will have to fit within alveolar layers with less than 1\,cm in height. In this contribution the design of the protoype is presented and the steps towards the realisation will be presented. At the time of the conferences it is expected that first results on thermal dissipation and mechanical stress the module will suffer from can be reported. These results will be obtained with a first version of the module which will be ready in January 2009.