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Physics
Atomic and Condensed Matter
Characterizing Electron Beam w/ CMOS-Camera or Faraday Cup
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[QUOTE="Philip Koeck, post: 6856897, member: 586311"] It's really just an electron gun similar to what's used in an SEM, but with a different purpose. I want to use it as a phase plate in a TEM. The idea is actually published, so it's not secret. You can find it on ResearchGate. At the moment I'm thinking of using a Tungsten filament which gives a source diameter of about 50 μm, a current density around 5 A/cm[SUP]2[/SUP], a brightness of 10[SUP]6[/SUP] A/cm[SUP]2[/SUP] sr and a total current around 200 μA, all at 100 keV electron energy. At 1 keV the current should be smaller by a factor 10. So, if I can demagnify the source by a factor 50 without too much loss of electrons I have what I need. A LaB6 "filament" might be an alternative since it gives a smaller source diameter (more like 10 to 20 μm). [/QUOTE]
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Physics
Atomic and Condensed Matter
Characterizing Electron Beam w/ CMOS-Camera or Faraday Cup
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