Electric lamp and discharge devices: systems – Cathode ray tube circuits – Combined cathode ray tube and circuit element structure
Patent
1993-02-05
1995-10-24
Lee, Benny T.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Combined cathode ray tube and circuit element structure
315 533, 315 535, 313453, 313455, 313448, 313157, H01J 2307
Patent
active
054612829
ABSTRACT:
An advanced center post (ACP) gun is provided which is capable of producing either a large orbit or small orbit electron beam. The gun comprises an annular shaped cathode, a control electrode adjacent the cathode, and an annular anode having an opening therethrough. A center post is disposed axially within the center region of the cathode and the control electrode along a center line of the electron gun and interaction region of a microwave device. The anode is shaped in conjunction with the center post to control position of equipotential lines of an electric field provided in an inter-electrode space between the cathode and the anode so that an electron beam emitted by the cathode converges at the anode opening. The control electrode provides electrostatic focusing of the beam to further control the beam convergence. Multiple polepieces provide accurate control of the magnetic field in the interaction region to shape the beam and control the orbit size and velocity spread.
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Vanderplaats, N. R., et al; "Magnetically Shielded Electron Guns with a Center Magnetic Post"; Int'l Electron Devices Meeting Proceedings; Washington D.C. U.S.A; (7-9 Dec. 1981: pp. 336-338.
Scheitrum, G. P. et al; "A Triple Pole Piece Magnetic Field Reversal Element for Generation of High Rotational Energy Beams"; Int'l Electron Devices Meeting Proceedings; Wash. D.C. USA (7-9 Dec 1981); pp. 332-335.
Scheitrum Glenn P.
True Richard B.
Lee Benny T.
Litton Systems Inc.
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