MIDAS (MIcrostrip Detector Array System) is a compact telescope for charged particles in which the active layers consist of silicon detectors. It has been designed to extend the angular acceptance of the DAPHNE detector, previously used at MAMI to study photoreactions up to 800 MeV. The device will be used in the experimental program of the GDH collaboration to check the Gerasimov-Drell-Hearn sum rule.
MIDAS enables particle tracking and discrimination and energy measurement.
The mechanics and the readout electronics have been realized by I.N.F.N.
and University of Pavia.
The software for acquisition tests, detector polarization and control has been
developed using the Labview code.
The detector resolution has been measured both by internal
conversion electrons from a 
Cs radioactive source and by
m.i.p. from cosmic rays.