Test beam performance of the CALICE Si–W electromagnetic calorimeter physics prototype

The CALICE Collaboration is studying several designs of calorimeters for the International Linear Collider project. The reference option for electromagnetic calorimeter is a high granularity sampling calorimeter with tungsten as radiator and silicon diodes as sensitive material. It is optimised for the Particle Flow Approach. A small but full depth “physics prototype” has been already constructed and tested in test beam conditions. Results from the calibration and resolution measurements are shown here. A technological prototype (the EUDET module) is under construction.