QCALT: A tile calorimeter for KLOE-2 experiment

The upgrade of the DA Φ NE machine layout requires a modification of the size and position of the inner focusing quadrupoles of KLOE-2 thus asking for the realization of two new calorimeters covering the quadrupoles area. To improve the reconstruction of K L → 2 π 0 events with photons hitting the quadrupoles a calorimeter with high efficiency to low energy photons (20–300 MeV), time resolution of less than 1 ns and space resolution of few cm, is needed. To match these requirements, we are designing a tile calorimeter, QCALT, where each single tile is readout by SiPM for a total granularity of 2400 channels. We show first tests of the different calorimeter components.