Development and testing of 140GHz absorber coatings for the water baffle of W7-X cryopumps

Miriam Floristán,Philipp Müller,Andreas Gebhardt,Andreas Killinger,Rainer Gadow,Antonio Cardella,Chuanfei Li,Reinhold Stadler,Günter Zangl,Matthias Hirsch,Heinrich P. Laqua,Walter Kasparek

Fusion Engineering and Design（2011）

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摘要

Due to the relatively high strayfield radiation (140GHz) from the electron cyclotron radio frequency heating system to which the W7-X cryopumps are expected to be subjected, coating systems acting as an efficient absorber for 140GHz radiation have been developed for the water-cooled baffle shield in order to reduce the thermal load on the liquid N shield and the liquid He cryopanel.

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关键词

Wendelstein 7-X cryopump,Atmospheric Plasma Spraying,Microwave absorption,Al2O3/TiO2 coatings,Coating thickness

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