The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 03, 1999
Filed:
Feb. 24, 1997
Robert Spencer Symons, Los Altos, CA (US);
Litton Systems, Inc., Woodland Hills, CA (US);
Abstract
An electron gun provides multiple convergent beamlets in a rectilinear flow for use in multiple drift tubes of a multiple beam klystron. The electron gun comprises a cathode having a concave emitting surface and an anode having a concave surface defined by respective ends of a plurality of hollow drift tubes. The anode surface is spaced from the cathode surface and has a positive voltage potential applied thereto to define a series of equipotential contour surfaces between the cathode and the anode. A plurality of grids are located between the cathode and the anode, with each one of the grids being disposed coincident with a respective one of the equipotential contour surfaces with a first one of the grids located closely adjacent to the cathode surface. Each one of the grids further has a plurality of perforations extending therethrough in substantial registration with each other and with respective openings of the plurality of drift tubes. A plurality of electron beamlets are drawn from the cathode surface through respective ones of the plurality of perforations and into respective ones of the plurality of drift tubes.