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Recent DHCAL Developments

This talk reports on recent progress concerning the development of a Digital Hadron Calorimeter with Resistive Plate Chambers as active elements. After the successful testing of a Digital Hadron Calorimeter prototype, the DHCAL, in the Fermilab and CERN test beams, the DHCAL group is now tackling some of the remaining technical issues which were not addressed specifically with the prototype. The talk reports on developments related to the RPC chamber design, to improvements in the RPC rate capabilities, the high voltage distribution system, and a gas recirculation system.