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where would be a good place to find an electron gun? Answered

I remember hearing that old tv's and possibly monitors have these, i'm thinking about making my own free electron laser, and i need a good source of, well, free electrons.

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The MadScientist
The MadScientist

10 years ago

The things in the TV's are the cathode ray tubes it uses 30000v to fire electrons at the fluorescent screen.

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kelseymh
kelseymh

10 years ago

Do you even know what an FEL is, or how it works? A source of electrons is the least of your problems.

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framistan
framistan

10 years ago

Lots of things are named oddly like that in electronics. An electron "Gun" is not any kind of gun. It is just a "heating element" that emitts electrons. It only works in a vacuum. Here are a couple more things named oddly:

A circuit called a "crowbar circuit" does not contain any "crowbars." but it figuratively hits the fuse with a "short" if the voltage goes too high...kind of like hitting it with a "crowbar."

A circuit in some color tv's called a "Jungle-circuit"... contains no jungles. It was named that because it had so many connections the designer thought it resembled the complexity of a jungle.

I think this is a kind of GEEK-HUMOR. Does anyone know of any more examples of this kind of funny-naming of electronic stuff?

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iceng
iceng

Answer 10 years ago

"Magnetic fields" are forever,
a "mega Cycle" is a very large Harley
and a "wave guide" is a useful surfing aid.

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iceng
iceng

10 years ago

If you could Lase free air electrons you might disintegrate matter.
Anyhow electrons just like pennies from he_ven are free.