Loaded Q's and field profiles of tapered axisymmetric gyrotron cavities

Derfler, H.; Grant, T.J.; Stone, D.S.

doi:10.1109/t-ed.1982.21052

Cited by 9 publications

(4 citation statements)

References 5 publications

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“…The resonance frequency ω and quality factor Q are determined by radiation boundary conditions at the resonator output section (Fliflet & Read 1981;Joye et al 2009). The eigenmodes in the open-ended cavity resonator are obtained by solving the wave equation in the cavity geometry and applying radiation boundary conditions for minimum reflections to obtain resonant frequencies of the eigenmodes (Bernstein, Divringi & Smith 1982;Derfler, Grant & Stone 1982). In our analysis, the results are obtained with a beam voltage of 60 kV and a pitch factor of 1.3.…”

Section: Fundamental Theorymentioning

confidence: 99%

Linear analysis of 170 GHz cylindrical and confocal gyrotron

Yang

Shen

2016

J. Plasma Phys.

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In this paper, the mode density, coupling coefficient, eigenfrequencies, quality factors and starting currents of a 170 GHz cylindrical and confocal gyrotron are studied based on the linear theory. Results show that the mode density in the confocal cavity greatly decrease due to the diffraction properties. Modes in the confocal cavity have lower quality factors than the modes in cylindrical cavity, hence the starting currents are higher than the latter. The confocal gyrotron is more stable than the cylindrical gyrotron when operating at large current. Meanwhile, through altering the mirror width, quality factors together with the starting current of the confocal modes are adjustable.

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Section: Fundamental Theorymentioning

confidence: 99%

Linear analysis of 170 GHz cylindrical and confocal gyrotron

Yang

Shen

2016

J. Plasma Phys.

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“…Cold tests of gyrotron cavities are difficult to perform in practice. Most cold-test schemes involve drilling coupling holes into the cavity walls [4], which can perturb the cavity mode severely. It is also difficult to couple efficiently to the mode of interest, which is frequently a high-order mode.…”

Section: Introductionmentioning

confidence: 99%

Cold tests of quasi-optical gyrotron resonators

Fischer

Hargreaves²,

Fliflet³

1991

IEEE Trans. Microwave Theory Techn.

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Cold tests are performed on quasi-optical gyrotron resonators at frequencies near 94 and 120 GHz to measure cavity Q. The separation between the resonator mirrors is varied between 0.15 and 0.35 m, with measured quality factors ranging from 10000 to 100000. Good agreement is obtained between the measured data and values calculated from scalar diffraction theory. The effeet of misaligning the mirrors is also examined experimentally.

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“…This The resonators of these and most gyrotrons are simple straight cylinders with tapers at either end [4].…”

Section: Introductionmentioning

confidence: 99%

“…It is based on a variation of the standard transmission resonance technique [6]. Drilling multiple holes into the cavity, as used in past application of this technique [4], is not required. Instead we make use of the resonator radiation pattern for coupling in and detecting the probing radiation.…”

Section: Introductionmentioning

confidence: 99%

Nondestructive Gyrotron Cold-Cavity Q Measurements

Woskoboinikow

Mulligan

1987

IEEE Trans. Microwave Theory Techn.

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A novel method for cold testing a gyrotron resonator for total Q is presented. Probing radiation is coupled into and out of the resonator through its radiation pattern. A sensitive heterodyne receiver is used in the far field to detect the cavity resonances. Good agreement between measurement and calculated total Q is found for several 140 GHz gyrotron resonators in the TE 0 3 1 , TE 0 32 , TE 2 3 1 , and TE 6 1 1 modes.

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Loaded Q's and field profiles of tapered axisymmetric gyrotron cavities

Cited by 9 publications

References 5 publications

Linear analysis of 170 GHz cylindrical and confocal gyrotron

Linear analysis of 170 GHz cylindrical and confocal gyrotron

Cold tests of quasi-optical gyrotron resonators

Nondestructive Gyrotron Cold-Cavity Q Measurements

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