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Does Thermionic emission require vacuum? Answered

Will a hot cathode emit electrons outside of a vacuum? If that won't work, what other ways could I get electrons in a non-vacuum environment? The only thing I can think of is making some plasma and pulling the electrons out electrostaticaly.

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Re-design

Best Answer 8 years ago

IIRC. Thermionic emission will work off any hot metal but it works much more efficiently in a vacuum and without a vacuum the metal tend to burn up much sooner.

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JaycubRe-design

Answer 8 years ago

Thank you, that's close to the answer I was hoping for.