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Nice Pix! Some that I have seen use 3-5 "wall bands" that are operated at ever increasing potential as the screen is approached. The idea here is to deflect electrons as they are moving slowly (for high deflection sensitivity) then accelerate the electrons as they approach the screen (for high brightness). The trick is to do this without loosing too much of the deflection sensitivity or producing distortions as the beam is accelerated. The "scan expansion mesh" was one of the better solutions.
I have attached a Pix of another early scheme that worked fairly well...a resistive spiral is deposited on the inside of the bottle. At the end near the deflection plates the spiral is connected to a low voltage (similar to that on the deflection plates)... the other end, to 10kV or so, to produce a nice bright image.
jr
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