Coaxial cavity gyrotron- recent experimental results

Piosczyk, B.; Arnold, A.; Dammertz, G.; Dumbrājs, O.; Kuntze, M.; Thumm, M.

doi:10.1109/tps.2002.801557

Cited by 68 publications

(16 citation statements)

References 14 publications

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“…Strong LFOs in the 100 MHz range can interfere with the diagnostic and control system of the gyrotron as was observed in General Atomics [7]. Similar problems have been reported in a coaxial gyrotron [8].…”

Section: Introductionmentioning

confidence: 60%

Observation and Study of Low-Frequency Oscillations in a 1.5-MW 110-GHz Gyrotron

Cerfon

Choi

Marchewka

et al. 2009

IEEE Trans. Plasma Sci.

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Section: Introductionmentioning

confidence: 60%

Observation and Study of Low-Frequency Oscillations in a 1.5-MW 110-GHz Gyrotron

Cerfon

Choi

Marchewka

et al. 2009

IEEE Trans. Plasma Sci.

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“…conventional cavity [4] and coaxial cavity [5] are the two popular type of cavities inherited for gyrotron design. In case of High Power Gyrotron ex.…”

Section: Cavity Designmentioning

confidence: 99%

Proposal of Mode Selection Criterian for Advanced KDEMO Gyrotron

2017

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Abstract. We proposed the design of a 255 GHz advanced gyrotron for Korea demonstration power plant (KDEMO) operation. Mode selection criterian for this DEMO gyrotron (output power > 1 MW) is discussed and a conventional cavity is designed for selected TE 55,13 mode. The designed cavity also excites the TE 37,9 mode at 170 GHz frequency. Beam wave interaction at both the frequencies are also analysed in our study.

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“…Frequently, spurious radiation in various spectrum regions, which is indicative of the presence of such fields, accompanies the operation of high-power gyrotrons and prevents achievement of calculated values of the output parameters of the tubes. In the case of high radiation intensity it can even cause deterioration of the tube elements and failure of measuring tools (e.g., see [1][2][3][4][5][6]). Appearance of high-frequency fields can be caused by various instabilities, which can develop in the electron beam due to spurious resonance cavities in the device or to external circuits.…”

Section: Introductionmentioning

confidence: 99%

Simulation of low-frequency collective processes in gyrotron electron beams

Luksha

2009

Radiophys Quantum El

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UDC 621.385We simulate collective processes in an electron space charge trapped between the cathode and the magnetic mirror in gyrotron-type systems using the particle-in-cell method. Threshold conditions of excitation and frequency-amplitude characteristics of low-frequency oscillations connected with the development of an instability in a space charge in the trap are determined using a gyrotron with an output power of 100 kW and a radiation wavelength of 4 mm as an example. The mechanism of the instability development in an ensemble of anharmonic electron oscillators is proposed and used to analyze the method of oscillation suppression based on varying the magnetic-field distribution in the region of the beam compression. The influence of low-frequency oscillations on the parameters of the electron beam entering the cavity is studied. The obtained calculation data are compared with the results of the experiments studying the parameters of low-frequency collective processes in gyrotrons.

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Coaxial cavity gyrotron- recent experimental results

Cited by 68 publications

References 14 publications

Observation and Study of Low-Frequency Oscillations in a 1.5-MW 110-GHz Gyrotron

Observation and Study of Low-Frequency Oscillations in a 1.5-MW 110-GHz Gyrotron

Proposal of Mode Selection Criterian for Advanced KDEMO Gyrotron

Simulation of low-frequency collective processes in gyrotron electron beams

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