Status of Dual-readout R&D for a linear collider in T1015 Collaboration

The hadronic energy resolution required for an hadronic operating at lepton collider is at the limits or even exceeds that obtained with traditional techniques. Furthermore, it is a well established fact that the presence of an electromagnetic section in front of an hadron calorimeter, as occurs in the layouts of the majority of detectors operating at a collider, would deteriorate the hadronic energy resolution of the device. The novel ADRIANO technology (A Dual-readout Integrally Active Non-segmented Option), currently under development at Fermilab, overcomes the above limitations by complementing an integrally active calorimeter with the dual-readout technique. Detailed Monte Carlo studies indicate that the energy resolution is in the 25%= p E - 38%= p E interval with a linear response of the detector up to an energy of 200 GeV. A baseline conguration is chosen with an estimated energy resolution of (E)=E 30%= p E. Several prototypes have been built by T1015 Collaboration at Fermilab, to explore the eect of modications of the layout from the baseline conguration. Preliminary results from several test beams at the Fermilab Test Beam Facility (FTBF) of 1 I prototypes are presented. Future prospects with ultra-heavy glass are, also, summarized.