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公开(公告)号：US3912930A
公开(公告)日：1975-10-14
申请号：US40096273
申请日：1973-09-26
Applicant: PHYSICS INT CO
Inventor： CREEDON JOHN MICHAEL , PUTNAM SIDNEY DARWIN
CPC classification number: H01J3/029
Abstract: An apparatus for focusing electrons incorporates a cathode and an anode in which electrons are caused to flow along equipotential lines or surfaces that converge toward a common point at or near the anode with the end of the cathode facing the anode having a cavity and with a wire or conductor connected to the anode or an independent electron beam injected along the axis to establish a conducting path to the anode through the focal point of the electron flow pattern.
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