Design and experimental operation of a 165-GHz, 1.5-MW, coaxial-cavity gyrotron with axial RF output

Iatrou, C.T.; Braz, O.; Dammertz, G.; Kern, Stefan; Kuntze, M.; Piosczyk, B.; Thumm, M.

doi:10.1109/27.597262

Cited by 44 publications

(9 citation statements)

References 10 publications

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“…If all the distances between adjacent coupling holes are equal to for multihole coupling, i.e., for for (5) then for for (6) and now for for (7) Comparing (6) with (3), it can be seen that constructive interference will occur under the condition (8) and the condition for destructive interference is (9) 2) Equal-Intensity Coupling: If all the radii of the coupling holes are equal, the coupling intensity will also be identical for all the holes, i.e.,…”

Section: ) Equal-interval Couplingmentioning

confidence: 99%

“…On the basis that the energy of the microwave field can scorch a piece of paper [1] or change the color of thermosensitive paper [2], or break down the gas in a low pressure cell [3], or illumine a neon tube [4], or heat a dielectric target plate to form an infrared picture [5], the image of an electric field structure can be displayed directly. The advantages of this imaging method are visual, simple, and independent of the microwave frequency.…”

Section: Introductionmentioning

confidence: 99%

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Mode discriminator based on mode-selective coupling

Wang

Gong

Gao

et al. 2003

IEEE Trans. Microwave Theory Techn.

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Mode discriminators based on mode-selective coupling principle have a series of advantages. The designing method of this type of discriminator is presented in this paper. The emphasis is put on the mode-selective coupler with a multihole and multigroup of coupling holes. All of the dimensions of the discriminator are determined by this method. The calibration and power measurement of the discriminator are also investigated. Some design examples of discriminators for 35-and 70-GHzgyrotrons, which can be applied to discriminate the TE 11 , TE 01 , and TE 02 modes and the TE 01 , TE 02 , and TE 03 modes, respectively, are given.

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Section: ) Equal-interval Couplingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mode discriminator based on mode-selective coupling

Wang

Gong

Gao

et al. 2003

IEEE Trans. Microwave Theory Techn.

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“…Attention has been paid to the coaxial-cavity gyrotrons, which are expected to operate with high power and high efficiency in the millimeter wave and sub-millimeter wave ranges [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. Generally, a coaxial-cavity gyrotron operates in a higher-order azimuthal mode index.…”

Section: Introductionmentioning

confidence: 99%

Higher-order mode operation of a high-power gyrotron

Zhang

APMC 2001. 2001 Asia-Pacific Microwave Conference (Cat. No.01TH8577)

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A gyrokinetic analysis is presented to the influence of the electron beam eccentricity on the power and starting current of a coaxial cavity gyrotron, which operates in a higher-order mode TE31, 11, I with a frequency of 165 GHz. It is found that the starting current becomes larger because of the existence of the electron-beam eccentricity. Especially, the power will be decreased substantially by the electron beam eccentricity, for example, down to 93% of the power without any eccentricity even if the eccentricity is 1% of the outer conductor radius. The acceptable range of the electron beam voltage and operating magnetic field for the establishment of the electromagnetic oscillation is narrowed by the electron-beam eccentricity.

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Section: Introductionmentioning

confidence: 99%

“…Generally, a coaxial-cavity gyrotron operates in a higher-order azimuthal mode index. In recent, the cavity of the 140 GHz I TE2II ,16,l coaxial gyrotron in FZK [9] has been replaced by a coaxial cavity in a higher-order mode TE31,I7,I with a frequency of 165 GHz and a power of 1.5 MW [10].…”

Section: Introductionmentioning

confidence: 99%

Study of frequency of a coaxial-cavity gyrotron oscillator

Zhang

APMC 2001. 2001 Asia-Pacific Microwave Conference (Cat. No.01TH8577)

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The eigenvalues of a coaxial cavity must be modified by the structural eccentricity (for instance. by the misalignment of the TImer rod), which causes an eigenfrequency shift. In this paper the eigenfrequency shift of the lrigher-order modes is numerically investigated in terms of the eigenvalue equation. Taking the TE,I,I"I, TE,l, 17 , 1 ,TE'l, 17,1 and TE,4, 17, I modes as examples, calculations show that the eigenfrequency of a mode may have a down-shift or up-shift.. which depends on the ratio of the outer conductor radius to the inner rod radius Raul ! R In' For a higher-order mode, the greater the value of Rou'! R ,. , the smaller the influence of the structural eccentricity on the eigenfrequency shift. Moreover, the structural eccentricity may have a weaker influence if the azimuthal index of tlle mode is higher.

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Design and experimental operation of a 165-GHz, 1.5-MW, coaxial-cavity gyrotron with axial RF output

Cited by 44 publications

References 10 publications

Mode discriminator based on mode-selective coupling

Mode discriminator based on mode-selective coupling

Higher-order mode operation of a high-power gyrotron

Study of frequency of a coaxial-cavity gyrotron oscillator

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