A novel technique for longitudinal segmentation of shashlik calorimeters has been tested in the CERN West Area beam facility. A 25 tower very fine samplings e.m. calorimeter has been built with vacuum photodiodes inserted in the first 8 radiation lengths to sample the initial development of the shower. Results concerning energy resolution, impact point reconstruction and electron/pion separation are reported.
@article{arxiv.hep-ex/9902008,
title = {An electromagnetic shashlik calorimeter with longitudinal segmentation},
author = {CALEIDO collaboration and A. C. Benvenuti and I. Britvich and T. Camporesi and P. Checchia and A. Feniouk and V. Hedberg and V. Lishin and M. Margoni and M. Mazzucato and V. Obraztsov and M. Paganoni and V. Poliakov and F. Simonetto and F. Terranova and E. Vlasov},
journal= {arXiv preprint arXiv:hep-ex/9902008},
year = {2009}
}