Electric lamp and discharge devices – Cathode ray tube – Ray generating or control
Patent
1993-08-03
1995-05-16
O'Shea, Sandra L.
Electric lamp and discharge devices
Cathode ray tube
Ray generating or control
445 34, H01J 2946
Patent
active
054163811
ABSTRACT:
A compact, high power electron gun having enhanced thermal and mechanical stability which incorporates a mechanically coupled, self aligning structure for the anode and cathode. The enhanced stability, and reduced need for realignment of the cathode to the anode and downstream optics during operation are achieved by use of a common support structure for the cathode and anode which requires no adjustment screws or spacers. The electron gun of the present invention also incorporates a modular design for the cathode, in which the electron emitter, its support structure, and the hardware required to attach the emitter assembly to the rest of the gun are a single element. This modular design makes replacement of the emitter simpler and requires no realignment after a new emitter has been installed. Compactness and a reduction in the possibility of high voltage breakdown are achieved by shielding the "triple point" where the electrode, insulator, and vacuum meet. The use of electric discharge machining (EDM) for fabricating the emitter allows for the accurate machining of the emitter into intricate shapes without encountering the normal stresses developed by standard emitter fabrication techniques.
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patent: 4607187 (1986-08-01), Villanyi
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Book, Introduction to Electron Beam Technology, Chapter 3, "Electron gun design," by L. H. Leonard, Published by John Wiley & Sons, Inc., pp. 70-95. undated.
Advertisement by Von Ardenne Anlagentechnik GmbH, "EH 30/20 High-Power Electron Beam Gun," 1 page in length. undated.
Advertisement by Von Ardenne Anlagentechnik GmbH, "EN 80/30 High-Power Electron Beam Gun," 1 page in length. undated.
Advertisement by Von Ardenne Anlagentechnik GmbH, "EH 300/35 High-Power Electron Beam Gun," 1 page in length. undated.
Advertisement by Von Ardenne Anlagentechnik GmbH, "EH 600/40 High-Power Electron Beam Gun," 1 page in length. undated.
Advertisement by Von Ardenne Anlagentechnik GmbH, "EH 1200/50 High-Power Electron Beam Gun," 1 page in length. undated.
Book, Electron Beam Technologies, Chapter 2, "Electron Guns", Section 2.5, by S. Schiller, U. Heisig, and S. Panzer, Published by John Wiley & Sons, Inc., 1982, pp. 134-137.
Lee Young J.
Parkison Clarence D.
Sawyer William C.
Scarpetti, Jr. Raymond D.
Switzer Vernon A.
Gaither Roger S.
Moser William R.
O'Shea Sandra L.
Patel Vip
The United States of America as represented by the United States
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