Cathode Ray Tube: Electron Source & Ionization

AI Thread Summary
Electrons in a cathode ray tube (CRT) originate from a filament through a process called thermionic emission. This process does not ionize the filament, as it remains grounded. The discussion also raises the question of whether electrons are cycled back through the circuit. The CRT operates by directing these emitted electrons to create images on the screen. Understanding these mechanisms is essential for grasping how CRT technology functions.
cragar
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When my Tv shoots electrons from the cathode ray tube , where do these electrons come from and is it ionizing whatever they come from.
 
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cragar said:
When my Tv shoots electrons from the cathode ray tube , where do these electrons come from and is it ionizing whatever they come from.

The came from a filament. The electrons are ejected via thermionic emission.

It is not ionizing for the filament. The filament is connected to ground.

Zz.
 
ok thanks for the answer , so then are the electrons cycled back through the circuit somehow
 

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