Title :
Loaded Q´s and field profiles of tapered axisymmetric gyrotron cavities
Author :
Derfler, Heinrich ; Grant, Thomas J. ; Stone, David S.
Author_Institution :
Max Planck Institute for Plasma Physics, Garching, West Germany
fDate :
12/1/1982 12:00:00 AM
Abstract :
A theoretical investigation of the vacuum electromagnetic properties of a class of tapered cylindrical resonant cavities employed in gyrotron design is reported. The cavity properties which determine gyrotron interaction efficiency-field profiles and loaded Q\´s-are predicted as a function of the geometric parameters. We show that this resonator geometry is superior to other designs for several reasons: 1) its properties are less sensitive to machining tolerances; 2) it produces negligible mode conversion at the output; and 3) in contrast with the limitations of iris-coupled designs, is capable of providing loaded Q\´s as low as ∼0.3 Qdiffwhere Qdiff= 4π(L/λ)2is the "diffraction limit." Cold tests in the millimeter bands are reported which verify these conclusions.
Keywords :
Fabrication; Forward contracts; Frequency; Geometry; Gyrotrons; Machining; Magnetic flux; Resonance; Tellurium; Testing;
Journal_Title :
Electron Devices, IEEE Transactions on
DOI :
10.1109/T-ED.1982.21052