Megawatt power generation of the dual-frequency gyrotron for TCV at 84 and 126 GHz, in long pulses
| Autor: | Jonathan Masur, Laura Savoldi, Etienne Perial, Theo Scherer, Francesca Cau, Rodolphe Marchesin, Alessandro Moro, Ioannis Gr. Pagonakis, Christian Moura, Saul Garavaglia, M. Toussaint, Manfred Thumm, B. Marletaz, Jianbo Jin, Stefano Alberti, Timothy Goodman, Jérémie Dubray, William Bin, Stefan Illy, Konstatinos A. Avramidis, Jean-Philippe Hogge, Francois Legrand, Alessandro Bruschi, U. Siravo, J. Genoud, Fabio Cismondi, Minh Quang Tran, Gerd Gantenbein, Damien Fasel |
|---|---|
| Předmět: |
Technology
Tokamak Radiowave and microwave technology Triodes Calorimetry 7. Clean energy 01 natural sciences 010305 fluids & plasmas law.invention Optics Triode law Transmission line Gyrotron 0103 physical sciences 010306 general physics Physics business.industry Pulse duration Power (physics) Electricity generation TCV business ddc:600 Waveguide Tokamaks |
| Zdroj: | AIP Conference Proceedings 23rd Topical Conference on Radiofrequency Power in Plasmas, pp. 090006-1–090006-4, Hefei, China, May 14-17, 2019 info:cnr-pdr/source/autori:Hogge, J-P; Alberti, S.; Avramidis, K. A.; Bruschi, A.; Bin, W.; Cau, F.; Cismondi, F.; Dubray, J.; Fasel, D.; Gantenbein, G.; Garavaglia, S.; Genoud, J.; Goodman, T. P.; Illy, S.; Jin, J.; Legrand, F.; Marchesin, R.; Marletaz, B.; Masur, J.; Moro, A.; Moura, C.; Pagonakis, I. Gr; Perial, E.; Savoldi, L.; Scherer, T.; Siravo, U.; Thumm, M.; Toussaint, M.; Tran, M-Q./congresso_nome:23rd Topical Conference on Radiofrequency Power in Plasmas/congresso_luogo:Hefei, China/congresso_data:May 14-17, 2019/anno:2020/pagina_da:090006-1/pagina_a:090006-4/intervallo_pagine:090006-1–090006-4 |
| ISSN: | 0094-243X |
| Popis: | In the frame of the TCV Tokamak upgrade, two 84/126 GHz/2 s dual frequency gyrotrons designed by SPC and KIT and manufactured by THALES will be added to the existing EC-System. The first unit has been delivered to EPFL-SPC and tested. In the commissioning configuration, a matching optics unit (MOU) is connected to the gyrotron window. The RF is then coupled to the HE11 mode of a 63.5mm corrugated waveguide and dissipated in a load procured by CNR after 4m of waveguide and 2 miter bends. Owing to the flexible triode gun design giving the possibility to adjust the pitch angle parameter, the specifications were met at both frequencies. At 84 GHz (TE17,5 mode), a power of 0.930 MW was measured in the calorimeter, with a pulse duration of 1.1 s. At the high frequency (126 GHz, TE26,7 mode), a power of 1.04 MW was reached for a pulse length of 1.2 s. Accounting for the load reflection and the ohmic losses in the various subcomponents of the transmission line and the tube, it is estimated that the output power at the gyrotron window is in excess of 1 MW at both frequencies, with an electronic efficiency of 32% and 34% at 84 GHz and 126 GHz respectively. The gyrotron behavior is remarkably robust and reproducible, and the pulse length is limited by external systems that will be improved shortly. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|