Title :
Mode selective properties of coaxial gyrotron resonators
Author :
Iatrou, Christos T.
Author_Institution :
Inst. fur Tech. Phys., Forschungszentrum Karlsruhe, Germany
fDate :
6/1/1996 12:00:00 AM
Abstract :
In this paper, the mode-selective properties of coaxial gyrotron resonators are discussed for different cavity configurations. Expressions are derived for the ohmic loading of a coaxial conductor with longitudinal corrugations where the RF field inside the corrugations is fully taken into account, and for the diffractive quality factor in coaxial cavities with tapered inner conductor relative to that of an empty cylindrical cavity. The competing action of a kind of “surface mode” that appears in corrugated structures is investigated by considering its diffractive and ohmic quality factors. Additional mode competition problems that can arise in coaxial cavities with corrugated inner conductor due to second cyclotron harmonic interaction are investigated and solutions to the problem are proposed
Keywords :
cavity resonators; gyrotrons; millimetre wave tubes; RF field; cavity configurations; coaxial conductor; coaxial gyrotron resonators; longitudinal corrugations; mode competition; mode selective properties; ohmic loading; quality factor; second cyclotron harmonic interaction; tapered inner conductor; Coaxial components; Corrugated surfaces; Cutoff frequency; Gyrotrons; Magnetic field measurement; Rectangular waveguides; Surface impedance; Tellurium; Voltage; Waveguide components;
Journal_Title :
Plasma Science, IEEE Transactions on
