Electron Guns

[AuroraIndust]

Does anyone know of a good source for small electron guns? Just a simple one. I was using a TV CRT gun but the filaments don't last when exposed to atmosphere. I obviously operate under vacuum but I have no way to store my device in a vacuum for a long period.

[berkeman]

Does anyone know of a good source for small electron guns? Just a simple one. I was using a TV CRT gun but the filaments don't last when exposed to atmosphere. I obviously operate under vacuum but I have no way to store my device in a vacuum for a long period.

I googled electron gun buy, and got some reasonable hits. See if any would work for you:

http://www.google.com/search?sourceid=navclient&aq=6&oq=electron+gun&ie=UTF-8&rlz=1T4GGLL_enUS301US302&q=electron+gun+buy

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[AuroraIndust]

The only supplier of them that I found was Kimball Physics, however those seem to be more complicated and advanced guns, which are most likely out of my ~500$ price range. I haven't received a quote from them as of now.