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Plasma Spraying of a Microwave Absorber Coating for an RF Dummy Load

Killinger, Andreas; Gantenbein, Gerd 1; Illy, Stefan 1; Ruess, Tobias ORCID iD icon 1; Weggen, Jörg 1; Martinez-Garcia, Venancio
1 Institut für Hochleistungsimpuls- und Mikrowellentechnik (IHM), Karlsruher Institut für Technologie (KIT)

Abstract (englisch):
The European fusion reactor research facility, called International Thermonuclear Experimental Reactor (ITER), is one of the most challenging projects that involves design and testing of hundreds of separately designed reactor elements and peripheric modules. One of the core elements involved in plasma heating are gyrotrons. They are used as a microwave source in electron–cyclotron resonance heating systems (ECRH) for variable injection of RF power into the plasma ring. In this work, the development and application of an alumina-titania 60/40 mixed oxide ceramic absorber coating on a copper cylinder is described. The cylinder is part of a dummy load used in gyrotron testing and its purpose is to absorb microwave radiation generated by gyrotrons during testing phase. The coating is applied by means of atmospheric plasma spraying (APS). The absorber coating is deposited on the inner diameter of a one-meter cylindrical tube. To ensure homogeneous radiation absorption when the incoming microwave beam is repeatedly scattered along the inner tube surface, the coating shows a varying thickness as a function of the tube length. By this it is ensured that the thermal power is distributed homogeneously on the entire inner tube surface. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000135154
Veröffentlicht am 09.07.2021
DOI: 10.3390/coatings11070801
Zitationen: 2
Web of Science
Zitationen: 1
Zitationen: 3
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Hochleistungsimpuls- und Mikrowellentechnik (IHM)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 2079-6412
KITopen-ID: 1000135154
HGF-Programm 31.13.02 (POF IV, LK 01) Plasma Heating & Current Drive Systems
Erschienen in Coatings
Verlag MDPI
Band 11
Heft 7
Seiten Article no: 801
Vorab online veröffentlicht am 02.07.2021
Schlagwörter microwave; absorber coating; Al2O3/TiO2; APS; 170 GHz; gyrotron; fusion reactor
Nachgewiesen in Dimensions
Web of Science
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