Just how bad can an Ion burn be?

[Kevin Kuehn]

You don't suppose that the anode voltage in conjunction with the shape of the CRT envelope has some influence on the ion defection pattern? There's got to be some electrostatic effect involved between the anode and ions.

[jr_tech]

Originally Posted by Kevin Kuehn

You don't suppose that the anode voltage in conjunction with the shape of the CRT envelope has some influence on the ion defection pattern? There's got to be some electrostatic effect involved between the anode and ions.

Have we considered ion production in the space between the deflection yoke and the screen? For sure, there were a number of un-aluminized rectangular crts produced in the 50s that had an ion trap, but the screen possibly could have been bombarded by ions produced past the electron gun.

jr

[benman94]

Originally Posted by jr_tech

Have we considered ion production in the space between the deflection yoke and the screen?

jr

What's going to produce the ions? Are we assuming that the electron beam interacts with residual gas, and ionizes it post-deflection? That's an interesting angle, but I don't see how the X pattern results...

[jr_tech]

Originally Posted by benman94

What's going to produce the ions? Are we assuming that the electron beam interacts with residual gas, and ionozes it post-deflection? That's an interesting angle, but I don't see how the X pattern results...

Yes, but I don't have a clue as to how the x shape might be produced.

jr

Perhaps a bit of argon, as well?

.

[Kevin Kuehn]

I was thinking the geometry of the envelope could have some influence on the distributed static field. A round envelope would seem to have the most even distribution.