The offline lead thickness measurement system for the ATLAS Electromagnetic Barrel Calorimeter

Abstract

We describe the apparatus that will be used to measure the thickness of the lead plates that are to be used for the production of the absorbers of the ATLAS Electromagnetic Barrel Calorimeter. Its performance is analysed, and the coherence between these measurements and the X-ray measurements obtained at the factory is studied, using the data that has been taken in view of the construction of Module 0. The results of the measurements that have been done in view of the construction of Module 0 are shown