[time-nuts] homebrew maser
bruce.griffiths at xtra.co.nz
Tue Aug 31 20:23:30 UTC 2010
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
A sual hexapole state selector is probably a little more effective than
the cruder method used in the Russian masers.
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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