Calorimeters play a very important role in all present and planned High Energy Physics experiments. The next generation of planned experiments puts quite stringent
requirements on energy resolution both for hadrons and jets on one side, and electrons and gammas on the other one. Present standard calorimetric techniques do not
comply with these requirements.
A new method to overcome these limitations, called Dual-readout, has been recently proposed and tested. It is based on the simultaneous measurement of the
scintillation and Cherenkov light signals produced in the shower development. In this way one can improve the resolution reducing the effects due to fluctuations of
the electromagnetic fraction of hadron showers.
We propose to further investigate with a view of optimizing this technique testing different options for the passive materials in sampling calorimeters. The main goal of the experiment is to build a full containment hadron calorimeter to fully prove this technique. Moreover light detectors and dedicated electronics will be developed. Simulations will help in the process.