  A neutron imaging detector based on neutron-sensitive microchannel plates
(MCPs) was constructed and tested at beamlines of thermal and cold neutrons.
The MCPs are made of a glass mixture containing B-10 and natural Gd, which
makes the bulk of the MCP an efficient neutron converter. Contrary to the
neutron sensitive scintillator screens normally used in neutron imaging,
spatial resolution is not traded off with detection efficiency. While the best
neutron imaging scintillators have a detection efficiency around a percent, a
detection efficiency of around 50% for thermal neutrons and 70% for cold
neutrons has been demonstrated with these MCPs earlier.
  Our tests show a performance similar to conventional neutron imaging
detectors, apart from the orders of magnitude better sensitivity. We
demonstrate a spatial resolution better than 150 um. The sensitivity of this
detector allows fast tomography and neutron video recording, and will make
smaller reactor sites and even portable sources suitable for neutron imaging.
