Why is the Plate Tilted in an Electron Gun?

[SWKatzen]

Hi,
I was wondering if anybody knows why the plate in an electron gun is tilted with respect to the electron path? Or has any resources that I could read to better understand? Thanks.

 

[A.T.]

I was wondering if anybody knows why the plate in an electron gun is tilted with respect to the electron path?

Tilted plate in an electron gun? Did you mean an X-ray tube?
https://en.wikipedia.org/wiki/X-ray_tube

 

[SWKatzen]

No sorry, the sheet between the two plates is at an angle to the electron stream. This is what I’m not sure about-

 

[berkeman]

Hi,
I was wondering if anybody knows why the plate in an electron gun is tilted with respect to the electron path? Or has any resources that I could read to better understand? Thanks.

Can you link to some pages that show this? That would help us out. Thanks.

https://en.wikipedia.org/wiki/Electron_gun

 

[davenn]

No sorry, the sheet between the two plates is at an angle to the electron stream. This is what I’m not sure about-

So that the electron beam will scan the whole screen rather than just a small region in the central area

 

[sophiecentaur]

So that the electron beam will scan the whole screen rather than just a small region in the central area

In a CRT TV tube, the deflection is magnetic and comes after the beam leaves the gun. We'd really need to see the particular gun that you are discussing.

 

[davenn]

n a CRT TV tube, the deflection is magnetic and comes after the beam leaves the gun.

Yes, I know that

 

[sophiecentaur]

Yes, I know that

Yeah, I thought you would but did the OP know? It could be that the throat of the gun is flared because there is a finite magnetic deflection, even that far back.
Electron optics is pretty damn hard stuff and the particular situation determines a lot about the gun design. Like, for instance, the high frequency oscilloscope tubes that used post deflection acceleration in order to get a bright line plus a fast scan. (Now that came out of my memory from a long time ago.)