Abstract
The purpose of this project is to develop a digital hadron calorimeter (DHCAL) using resistive plate chambers (RPCs) as active medium. RPCs are ideally suited for such a calorimeter: they are simple in design, cheap to build, reliable and robust, and the readout can be segmented into small pads of say 1 cm/sup 2/, as required for a DHCAL at the linear collider. Work on developing these chambers has been underway at Argonne for about two years. Several single-gap and multi-gap chambers operating in avalanche mode have been built and have been tested thoroughly with sources and cosmic rays. Tests with up to 64 pads of 1 cm/sup 2/ each are ongoing. Furthermore, considerable effort is dedicated to the development of the readout system, a challenge by itself given the large number of channels, of order 400K for the prototype and 50/spl times/106 for the entire DHCAL.
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