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:
Jul. 28, 1992
Filed:
Aug. 22, 1990
Hans-Gunter Mathews, Oberehrendingen, CH;
Asea Brown Boveri Ltd., Baden, CH;
Abstract
For the purpose of generating an electron beam (5), a quasi-optical gyrotron comprises an electron-beam gun (1) with an annular cathode (2). The electron beam (5) passes along an electron beam axis (6) and in so doing is compressed by a static magnetic field and forced into gyration, so that it excites in a quasi-optical resonator a standing alternating electromagnetic field of specific wavelength. The resonator exhibits two mirrors (9a, 9b) arranged opposite to one another on a resonator axis (8) aligned perpendicular to the electron beam axis (6). In order to increase the efficiency of the gyrotron, the annular cathode (2) alternately exhibits segments of high and low emitting power such that the electron beam (5) has an azimuthally varying current density, values of low current density in the resonator coinciding spatially with nodal surfaces of the standing alternating electromagnetic field.