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Charged Particle Emitting Assembly

Sanderson Allan

In the present invention, there is disclosed a charged particle emitting assembly comprising an emitter (5) for emitting charged particles of one polarity; a tubular shield electrode (6) circumferentially surrounding the emitter and held in use at the same polarity as the charged particles; and a tubular accelerating electrode (7) positioned substantially coaxially with the shield electrode (6) and held in use at the opposite polarity to the shield electrode, the arrangement being such that charged particles from the emitter (5) initially spread laterally outwardly and then are focused into a beam which passes through the tubular accelerating electrode (7).

CZ 2000749 A

2004

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