The CALICE collaboration investigates diferent technology options for highly
granular calorimeters for detectors at a future electron-positron collider. One
of the devices constructed and tested by this collaboration is a 1m3 prototype
of a scintillator-steel sampling calorimeter for hadrons with analogue readout
(AHCAL). The light from 7608 small scintillator cells is detected with silicon
photomultipliers. The AHCAL has been successfully operated during electron and
hadron test-beam measurements at DESY, CERN, and Fermilab since 2005. One of
main tasks for the successful data taking is to establish procedures for the
equalization of cell responses and calibration of such a large number of
channels.Comment: Proceedings of the International Workshop on Future Linear Colliders
LCWS11, Granada, Spain, 2011. 8 pages, 8 figure