[time-nuts] homebrew maser

[Bruce Griffiths]

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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