High power gyrotron development at KIT for ECH&amp;amp;CD of fusion plasmas

Jelonnek, John; Alberti, S.; Avramidis, K.A.; Braune, H.; Erckmann, V.; Gantenbein, G.; Hogge, J.‐P.; Illy, S.; Jin, Jianbo; Kern, Stefan; Noke, F.; Pagonakis, I.; Piosczyk, B.; Purps, F.; Rzesnicki, T.; Samartsev, A.; Schlaich, A.; Schmid, Martin; Thumm, M.

doi:10.1109/ivec.2012.6262094

Cited by 2 publications

(1 citation statement)

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“…1b. As very high heat fluxes are expected on the inner collector surface, different strategies for sweeping the spent electron beam are being considered [13]. Here we consider the simplest one, i.e., the so-called vertical sweeping.…”

Section: Gyrotron Collector Geometry and Heat Loadmentioning

confidence: 99%

Numerical investigation of collector cooling for a 1 MW ITER gyrotron operated with vertical sweeping

Savoldi

Bertani

Cau

et al. 2015

Fusion Engineering and Design

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Section: Gyrotron Collector Geometry and Heat Loadmentioning

confidence: 99%

Numerical investigation of collector cooling for a 1 MW ITER gyrotron operated with vertical sweeping

Savoldi

Bertani

Cau

et al. 2015

Fusion Engineering and Design

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State-of-the-Art of High-Power Gyro-Devices and Free Electron Masers

Thumm

2020

J Infrared Milli Terahz Waves

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STATE-OF-THE-ART OF HIGH POWER GYRO-DEVICES AND FREE ELECTRON MASERSAt present, gyrotron oscillators are mainly used as high power millimeter wave sources for electron cyclotron resonance heating (ECRH) and diagnostics of magnetically confmed plasmas for generation of energy by controlled thermonuclear fusion. 140 GHz gyrotrons with output power Pout = 0.58 MW, pulse length 't = 2.0 s and efficiency 11 = 34 % are commercially available. Diagnostic gyrotrons deliver P out = 40 kW with 't = 40 J-lS at frequencies up to 650 GHz (11 2_ 4 %). Recently, gyrotron oscillators have also been successfully used in matedal processing and plasma chemistry. Such technological applications require gyrotrons with the following parameters: f 2. 28 GHz , Pout = 10-30 kW, CW, 11 2. 30 %. This paper reports on achievements and problems related to the development of very high power mm-wave gyrotrons for long pulse or CW operation and describes the microwave technological pecularities of the different development steps. In addition, this work gives a short overview of the present development of gyrotrons for technological applications, quasi-optical gyrotrons, cyclotron autoresonance masers (CARMs), gyro-ldystrons, gyro-TWT amplifiers, gyro-BWO's and free electron masers (FEMs). The most impressive FEM output parameters are: Pout = 2GW, 't = 20 ns, 11 = 13 % at 140 GHz (LLNL) and Pout = 15 kW, 't = 20 J-tS, 11 = 5 % in the range from 120 to 900 GHz (UCSB). ENTWICKLUNGSSTAND VON HOCHLEISTUNGS-GYRO-RÖHREN UND FREI-ELEKTRONEN-MASERN Übersiebt Gyrotronoszillatoren werden derzeit vorwiegend als Hochleistungsmillimeterwellenquellen für die Elektron-Zyklotron-Resonanzheizung (ECRH) und Diagnostik von magnetisch eingeschlossenen Plasmen zur Erforschung der Energiegewinnung durch kontrollierte Kernfusion eingesetzt. 140 GHz Gyrotrons mit einer Ausgangsleistung von Pout = 0.58 MW bei Pulslängen von 't = 2.0 s und Wirkungsgraden von • 11 = 34% sind kommerziell erhältlich. Gyrotrons zur Plasmadiagnostik erreichen Frequenzen bis zu 650 GHz bei P out = 40 kW und 't = 40 ~-ts (11 2. 4 %). In jüngster Zeit jedoch finden Gyrotronoszillatoren auch für technologische Prozesse und in der Plasmachemie erfolgreich Verwendung. Dabei werden Röhren mit folgenden Parametern eingesetzt: f 2_ 28 GHz, Pout = 10-30 kW, CW, 11 2. 30 %. In diesem Beitrag wird auf den aktuellen Stand und die Probleme bei der Entwicklung von Hochleistungs-mm-Wellen-Gyrotrons für Langpuls-und Dauerstrichbetrieb sowie auf die mikrowellentechnischen Besonderheiten der einzelnen Entwicklungsphasen eingegangen: Außerdem wird auch kurz über den neuesten Stand der Entwicklung von Gyrotrons für technologische Anwendungen, quasi-optischen Gyrotrons, Zyklotron-Autoresonanz-Masern (CARMs), Gyroklystrons, Gyro-TWT-Verstärkern, Gyro-Rückwärtswellenoszillatoren (BWOs) und Frei-Elektronen-Maser (FEM) berichtet. FEM-Rekordausgangsparameter sind hier: Pout = 2 GW, 't = 20 ns, 11 = 13 % bei 140 GHz (LLNL) und Pout = 15 kW, 't = 20 J-lS, 11 = 5 % im Bereich von 120 bis 900 GHz (UCSB). Contents

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High power gyrotron development at KIT for ECH&CD of fusion plasmas

Cited by 2 publications

References 4 publications

Numerical investigation of collector cooling for a 1 MW ITER gyrotron operated with vertical sweeping

Numerical investigation of collector cooling for a 1 MW ITER gyrotron operated with vertical sweeping

State-of-the-Art of High-Power Gyro-Devices and Free Electron Masers

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