First results of the SDHCAL technological prototype

Abstract

The CALICE Semi-digital hadronic calorimeter built in 2011, was installed and tested during two periods of two weeks each in 2012 at CERN SPS facilities. The detector has more than 450000 channels with a semi-digital readout distributed on 48 layers with efficiency exceeding 95%. It has been run using the trigger-less and power pulsing modes. Data have been collected with muon, electron and hadron beams in the energy range between 5 and 80 GeV. This contribution focuses on the performances, the shower selection methods and on the first results on the calibration using pions.