  We are developing imaging and photon counting UV-MCP detectors, which are
sensitive in the wavelength range from far ultraviolet to near ultraviolet. A
good quantum efficiency, solar blindness and high spatial resolution is the aim
of our development. The sealed detector has a Cs-activated photoactive layer of
GaN (or similarly advanced photocathode), which is operated in semitransparent
mode on (001)-MgF 2 . The detector comprises a stack of two long-life MCPs and
a coplanar cross strip anode with advanced readout electronics. The main
challenge is the flawless growth of the GaN photocathode layer as well as the
requirements for the sealing of the detector, to prevent a degradation of the
photocathode. We present here the detector concept and the experimental setup,
examine in detail the status in the production and describe the current status
of the readout electronics development.
