  Experiments at the future Electron Ion Collider require excellent hadron
identification in a broad momentum range, in harsh conditions. A RICH capable
to fulfill the PID requirements of the EIC could use MPGD-based photon
detectors with solid photocathodes for covering large surfaces at affordable
cost, providing good efficiency, high resolution and compatibility with
magnetic field. Photon detectors realized by coupling THGEMs and Micromegas
have been successfully operated at the RICH-1 detector of the COMPASS
Experiment at CERN since 2016. A similar technology could be envisaged for an
EIC RICH, provided a large improvement in the photon position resolution is
achieved. An R\&D effort in this direction is ongoing at INFN Trieste. Few
prototypes with smaller pixel size (down to 3 mm x 3 mm) have been built and
tested in the laboratory with X-Ray and UV LED light sources. A modular
mini-pad detector prototype has also been tested at the CERN SPS H4 beamline.
New data acquisition and analysis software called Raven DAQ and Raven Decoder
have been developed and used with the APV-25 based Scalable Readout System
(SRS), for the modular mini-pad prototype tests.
