Study of the granular electromagnetic calorimeter with PPDs and scintillator strips for ILC

A prototype module of a fine-granular electromagnetic calorimeter has been constructed by the CALICE collaboration and tested in the period August–September 2008 at the FNAL meson beam test facility. The calorimeter is one of the proposed concepts for a highly granular electromagnetic calorimeter for the International Linear Collider (ILC) experiment, which is designed to have an effective 10 mm×10 mm lateral segmentation using 10 mm×45 mm scintillator strips. The strips in the 15 odd layers are orthogonal with respect to those in the 15 even layers. A total of 2160 strip scintillators are individually read out using a Pixelated Photon Detector (PPD) or MPPC. As a preliminary result of the first stage analysis, we obtain a relative energy resolution for single electrons of σE/E=(15.15±0.03)%/Ebeam(GeV)⊕(1.44±0.02)%, the quoted uncertainties are purely statistical.