The results outlined here support the feasibility of using
microcolumnar CsI(Tl) films for thermal neutron imaging
with a suitable converter. We designed and tested a ‘‘sandwich’’
configuration for maximizing the neutron sensitivity
of the imaging screen while reducing its gamma sensitivity.
The deposition of the triple layer was performed on fiberoptic
as well as aluminum substrates of various dimensions
up to 3 in. · 3 in. The future work will include optimization
of the detector components including the layers’ thickness,
and further development of a protocol for sensor
fabrication.
These data demonstrate the feasibility of developing a
large area, high resolution, thermal neutron imaging system
for crystallographic studies as well as neutron radiography.
In the future, larger area screens can be produced on
inexpensive and durable aluminum substrates.