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Mirror development for the 140 GHz ECRH transmission system on the stellarator W7-X

W Kasparek, L Empacher, V Erckmann, G Gantenbein, H Zohm2001年Fusion Engineering and DesignIF 1.7出版社

AbstractFor the future stellarator W7-X of IPP at Greifswald, a powerful electron cyclotron resonance heating (ECRH) facility is under design, which will include ten gyrotrons at 140 GHz with a CW power of 1 MW each plus two optional gyrotrons at 70 GHz. The millimetre wave power will be transmitted via two multi-beam waveguides (MBWG) with a length of about 50 m. This paper shows results for the optimum shape of the mirrors and the mode conversion of the MBWG transmission system. The design which will be used for water-cooled mirrors and cooling structures is discussed. Concepts for the back reflectors, which will be mounted at the inner side of the vacuum vessel of W7-X to redirect the non-absorbed part of the beam back into the plasma are presented. A test facility to test the transmission properties of quasi-optical lines, including a measurement system for ohmic loss of mirrors, a reflectometer to detect possible surface deformations and an alignment control system is described.

日本語訳

将来のグライフスヴァルトにおけるIPPのステラレーターW7-Xのために、強力な電子サイクロトロン共鳴加熱(ECRH)設備が設計中であり、これには140 GHzで各1 MWの連続波出力を持つ10基のジャイロトロンに加え、70 GHzの2基のオプション用ジャイロトロンが含まれる。ミリ波電力は、約50 mの長さを持つ2本のマルチビーム導波管(MBWG)を介して伝送される。本論文では、MBWG伝送システムにおけるミラーの最適形状とモード変換の結果を示す。水冷ミラーに使用される設計と冷却構造について議論する。W7-Xの真空容器内側に取り付けられ、非吸収ビームの一部をプラズマへと再導向する背面反射鏡の概念を提示する。準光学ラインの伝送特性を試験するための試験設備について説明する。これには、ミラーのオーミック損失測定システム、可能な表面変形を検出するための反射計、およびアライメント制御システムが含まれる。

装置

wendelstein-7x高精度(タイトル一致)

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StellaratorElectron cyclotron heatingW7-X
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