Recent results of the 1-MW, 140-GHz, TE/sub 22,6/-mode gyrotron

Dammertz, G.; Braz, O.; Chopra, Ayush; Koppenburg, K.; Kuntze, M.; Piosczyk, B.; Thumm, M.

doi:10.1109/27.772259

Cited by 51 publications

(18 citation statements)

References 6 publications

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“…(A.7) for details) and disturbs the electric field in the RF cavity. This phenomenon is affected by both the electron-beam alignment and the reflection conditions, and the same phenomenon has been reported in a MW-class gyrotron [5]. This effect was corrected by sampling the incident power (V in ) with the beam splitter shown in Fig.…”

Section: Correction Of the Reflection Effectmentioning

confidence: 82%

“…The conditions of the gyrotron oscillation were very sensitive to the fabrication accuracy of the RF cavity, the quality of the emitter surface of the MIG, and the alignment of the cavity in the magnetic field. In general, it was difficult to reproduce the same conditions for all gyrotron operations [5] (see Appendix A.6 for details). The output frequency of the gyrotron was measured using a hetero-dyne technique with a synthesizer (∼12 GHz) as the local oscillator.…”

Section: Properties Of the Gyrotron Fu Cw Gimentioning

confidence: 99%

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Experimental

Miyazaki¹

2015

Springer Theses

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Section: Correction Of the Reflection Effectmentioning

confidence: 82%

Section: Properties Of the Gyrotron Fu Cw Gimentioning

confidence: 99%

Experimental

Miyazaki¹

2015

Springer Theses

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“…The gun and magnet are the same as those used in [17], but the operating mode is different (TE 22,8 instead of the TE 22,6 mode). Table 5 shows a few results of calculations of beam properties for various accelerating voltages and beam currents, as in [9].…”

Section: Calculations Of Output Power and Efficiencymentioning

confidence: 99%

Effect of Resonator Parameters on Frequency and Quality Factor of Gyrotron Resonators

Borie¹

2007

Int J Infrared Milli Waves

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The influence of some cavity parameters on the resonance frequency and quality factor is investigated with the aim of comparing various methods of optimization. As an example, the geometry of the designed resonator for an experiment on a multifrequency gyrotron that would operate at 140 GHz in the TE 22,8 mode is considered. This is a weakly-tapered conventional cavity resonator with parabolicroundings. The influence of the roundings on the quality factor is at least as important as that of the cavity length and the output taper angle.

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“…Originally this device has been designed for the TE 22,6 mode operation at 140 GHz [11]. It was the first high power gyrotron operated with a Brewster angle window which in the early phase consisted of a fused silica quartz glass or SiN disk.…”

Section: Experimental Set_upmentioning

confidence: 99%

First Operation of a Step-Frequency Tunable 1-MW Gyrotron With a Diamond Brewster Angle Output Window

Gantenbein

Samartsev

Aiello

et al. 2014

IEEE Trans. Electron Devices

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Abstract-Experimental results using a step-frequency tunable D-band gyrotron are reported. The short-pulse (~3 ms) gyrotron is equipped with an elliptically brazed CVD diamond Brewster angle output window. It is designed for the operation in the frequency range from 111.6 GHz up to 165,7 GHz. Operating parameters for 10 different frequencies corresponding to an equal number of different cavity operating modes has been measured. A minimum output power of 830 kW and a peak output power of 1.3 MW have been realized. For all frequencies the parameters of the RF beam generated by the internal quasioptical converter, such as fundamental Gaussian contents and beam waist, are sufficiently good to allow an efficient coupling of the RF power out of the window. This is the first time a diamond Brewster angle window has been used in a high power gyrotron (~ 1 MW). Such a system offers the path to a simple and compact window solution for high power broadband applications using gyrotrons.

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Recent results of the 1-MW, 140-GHz, TE/sub 22,6/-mode gyrotron

Cited by 51 publications

References 6 publications

Experimental

Experimental

Effect of Resonator Parameters on Frequency and Quality Factor of Gyrotron Resonators

First Operation of a Step-Frequency Tunable 1-MW Gyrotron With a Diamond Brewster Angle Output Window

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