PTFE wall storage bulb wall coatings haven't been used for some decades,
FEP (or the Russian fluoropolymer ) is better in that a smoother coat is
achievable see:
http://www.dtic.mil/cgi-bin/GetTRDoc?Location=U2&doc=GetTRDoc.pdf&AD=ADA509340
<http://www.dtic.mil/cgi-bin/GetTRDoc?Location=U2&doc=GetTRDoc.pdf&AD=ADA509340>
A sual hexapole state selector is probably a little more effective than
the cruder method used in the Russian masers.
Bruce
Mark Sims wrote:
Same general idea, but an image intensifier plate would probably not work
well. They are usually thinner and are cut at a bias so the electrons ricochet
along its length. You might be able to mount one so that it cancels the bias
angle.
They are made by stretching a bundle of hollow glass tubes that have been
filled with solid glass rods of a different composition. The original bundle
can be very large (like over a meter) and is shrunk down to like 100 fibers per
millimeter. It is then sliced and polished. Often the slices (or the pulled
bundles) are joined into a bigger plate. Then the inner solid glass is
dissolved out with a strong alkali. The hollow tubes are coated with a
photoelectric material.
The image from the tube is inverted using a "twister"... a coherent fiber
optic rod that has a 180 degree twist.
---------------
Do you know if the collimator is made from an uncoated microchannel plate?
If so, an old, broken Gen II image intensifier might be a viable source.
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