Simulations of the experimental operation of the EU 170 GHz, 1 MW short-pulse prototype gyrotron for ITER

Avramidis, Konstantinos A.; Pagonakis, I.; Chelis, Ioannis; Gantenbein, G.; Ioannidis, Zisis C.; Peponis, Dimitrios V.; Rzesnicki, T.; Jelonnek, John

doi:10.1109/irmmw-thz.2016.7758517

Cited by 2 publications

(2 citation statements)

References 8 publications

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“…2 presents a typical example of the output RF power with respect to the accelerating voltage. For both operating points the nominal mode TE32,9 is easily excited at the frequency 170.1 GHz and it is possible to generate power higher than 1 MW with 30 % total efficiency in non-depressed collector operation, which corresponds to an electronic efficiency of 35 %, as expected from theory [3]. It is interesting to note that by significantly increasing the beam current to 63 A, more than 1.2 MW power was generated (in non-depressed collector operation) with an efficiency of approximately 30%.…”

Section: Operation With the Basic Configurationsupporting

confidence: 53%

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: Operation With the Basic Configurationsupporting

confidence: 53%

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 ED model has already been successfully validated against experimental results for a number of operating points, involving various high-power gyrotrons in short-pulse operation (<10 ms), e.g., the European 170 GHz 1 MW gyrotron for ITER [43], the 170 GHz 2 MW coaxial gyrotron at KIT [44] or the 140 GHz 1.5 MW gyrotron for W7-X [45]. Note that, in short-pulse operation, the cavity thermal expansion is negligible; hence, the ED model can be validated against experimental results without the need of TH and TM simulations.…”

Section: Validation Of the Ed Modelmentioning

confidence: 99%

A Validation Roadmap of Multi-Physics Simulators of the Resonator of MW-Class CW Gyrotrons for Fusion Applications

et al. 2021

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For a few years the multi-physics modelling of the resonance cavity (resonator) of MW-class continuous-wave gyrotrons, to be employed for electron cyclotron heating and current drive in magnetic confinement fusion machines, has gained increasing interest. The rising target power of the gyrotrons, which drives progressively higher Ohmic losses to be removed from the resonator, together with the need for limiting the resonator deformation as much as possible, has put more emphasis on the thermal-hydraulic and thermo-mechanic modeling of the cavity. To cope with that, a multi-physics simulator has been developed in recent years in a shared effort between several European institutions (the Karlsruher Institut für Technologie and Politecnico di Torino, supported by Fusion for Energy). In this paper the current status of the tool calibration and validation is addressed, aiming at highlighting where any direct or indirect comparisons with experimental data are missing and suggesting a possible roadmap to fill that gap, taking advantage of forthcoming tests in Europe.

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Simulations of the experimental operation of the EU 170 GHz, 1 MW short-pulse prototype gyrotron for ITER

Cited by 2 publications

References 8 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

A Validation Roadmap of Multi-Physics Simulators of the Resonator of MW-Class CW Gyrotrons for Fusion Applications

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