Numerical Investigation on Spent Beam Deceleration Schemes for Depressed Collector of a High-Power Gyrotron

Pagonakis, I.; Illy, S.; Ioannidis, Zisis C.; Rzesnicki, T.; Avramidis, Konstantinos A.; Gantenbein, G.; Kobarg, T.; Piosczyk, B.; Thumm, M.; Jelonnek, John

doi:10.1109/ted.2017.2784185

Cited by 6 publications

(2 citation statements)

References 15 publications

(13 reference statements)

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“…Based on the performance of the gyrotron when the complete mirror box is set on high-voltage, a metallic construction that may be installed inside the mirror box and can bring the body voltage closer to the collector was developed and will be tested [5]. Fig.…”

Section: Modified Deceleration Setupsmentioning

confidence: 99%

Report of recent experiments with the European 1 MW, 170 GHz CW and SP prototype gyrotrons for ITER

et al. 2019

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The European 1 MW, 170 GHz industrial CW prototype gyrotron has been designed within EGYC (European GYrotron Consortium) in collaboration with the industrial partner Thales Electron Devices (TED) and under the coordination of Fusion for Energy (F4E). This is a conventional (hollow) cavity gyrotron that is based on the 1 MW, 170 GHz short-pulse (SP) modular gyrotron, which has been designed and manufactured by KIT in collaboration with TED. The SP prototype has been tested in multiple experimental campaigns since 2015 and the nominal cavity mode TE32,9 is exited at 170.1 GHz, producing RF power above 1 MW with 35 % interaction efficiency. The first phase of the experiments with the CW industrial gyrotron was successfully completed at KIT in 2016, verifying most of the ITER specifications. Short pulses (<10ms) deliver RF power higher than 0.9 MW with a total efficiency of 26 % (in non-depressed collector operation). The Gaussian mode content of the RF beam is 97 %. Pulses with duration of 180 s (limited by the high-voltage power supply at KIT) produce power more than 0.8 MW with maximum efficiency 38 % (in depressed collector operation). In this work the achievements with the SP and the CW prototype gyrotrons are summarized.

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Section: Modified Deceleration Setupsmentioning

confidence: 99%

Report of recent experiments with the European 1 MW, 170 GHz CW and SP prototype gyrotrons for ITER

et al. 2019

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“…Theoretical and experimental studies of the coaxial cavity gyrotron with an older MIG justify that the choice of a nominal body voltage at V b ¼ 35 kV was considered as a reasonable option. 27…”

Section: Operationmentioning

confidence: 99%

Triode magnetron injection gun for the KIT 2 MW 170 GHz coaxial cavity gyrotron

et al. 2020

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Considering the recent understanding of the physics of electron trapping mechanisms taking place in the magnetron injection gun (MIG) region of gyrotrons and the sensitivity of the emitter ring manufacturing tolerances on the electron beam quality, a MIG has been designed and manufactured for the 2 MW, 170 GHz coaxial cavity gyrotron developed at Karlsruhe Institute of Technology. The new MIG has the following novelties: (i) the design satisfies the criteria for the suppression of the electron trapping mechanisms, (ii) a new type of emitter ring is used for the suppression of the influence of the manufacturing tolerances and misalignments on the quality of the generated electron beam, and (iii) the design was optimized to generate a good beam quality in a wide variety of magnetic field profiles to increase the flexibility. An additional important feature of the new triode MIG design is the possibility to operate with only two power supplies by using a special start-up scenario. The first experimental results of the coaxial cavity gyrotron with the new MIG are presented.

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Magnetic Field Sensitivity in Depressed Collector for a Millimeter-Wave Gyrotron

Kesari

Seshadri

2018

Lecture Notes in Electrical Engineering

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Numerical Investigation on Spent Beam Deceleration Schemes for Depressed Collector of a High-Power Gyrotron

Cited by 6 publications

References 15 publications

Report of recent experiments with the European 1 MW, 170 GHz CW and SP prototype gyrotrons for ITER

Report of recent experiments with the European 1 MW, 170 GHz CW and SP prototype gyrotrons for ITER

Triode magnetron injection gun for the KIT 2 MW 170 GHz coaxial cavity gyrotron

Magnetic Field Sensitivity in Depressed Collector for a Millimeter-Wave Gyrotron

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