magnetically focused tube

magnetically focused tube

[mag′ned·ə·klē ¦fō·kəst ′tüb]
(electronics)
An image tube in which electrons from the photocathode are accelerated by electric fields and forced into tight spiral paths as they are further accelerated by a uniform magnetic field down the center of the tube.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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