The DHCAL Results from Fermilab Beam Tests: Calibration

The large CALICE Digital Hadron Calorimeter prototype (DHCAL) was built in 2009-2010 and was tested in the Fermilab and CERN test beams. The DHCAL uses Resistive Plate Chambers (RPCs) as active media and is read out with $1 \times 1$ cm$^2$ pads and digital (1-bit) resolution. With a world record of about 480k readout channels, the DHCAL offers the possibility to study hadronic interactions with unprecedented spatial resolution. Here we report on the results from the analysis of pion events of momenta between 2 to 60 GeV/c collected in the Fermilab test beam. We present the details of the intricate calibration procedures and the utilization of detailed event topologies.