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Design and initial tests of a low voltage stacked stripline fast wave launcher in the Phaedrus-T tokamak

P.H. Probert, S.P. Oliva, G.R. Winz, D.J. Hoffman, J.B.O. Caughman II, W.L. Gardner1996年Nuclear FusionIF 3出版社

A new type of antenna for launching waves in the ion cyclotron frequency range in toroidal plasma devices has been developed and tested in the Phaedrus-T tokamak. This antenna, a stacked stripline (SSL), generates a radiofrequency (RF) magnetic field similar to that of a conventional strap antenna but develops voltages 2 orders of magnitude less, and can operate without a Faraday shield. In comparison tests with a conventional strap antenna at a power level of 69 kW, the RF induced density rise and the impurity production (as indicated by soft X ray and loop voltage increases) were reduced by a factor of 3. In addition, it was demonstrated that capacitive loading effects were reduced or eliminated in comparison with those observed on a conventional strap antenna operated without a Faraday shield, and in the operation of a pair of SSL antennas at 90 degrees phase, small current drive effects were observed

日本語訳

トロイダルプラズマ装置におけるイオンサイクロトロン周波数帯の波動を励起するための新型アンテナが開発され、Phaedrus-Tトカマクにおいて試験が行われた。このアンテナは、積層ストリップライン(SSL)であり、従来のストリップアンテナと同様の高周波(RF)磁場を生成するが、発生電圧は2桁低く、ファラデーシールドなしで動作可能である。従来のストリップアンテナとの比較試験(電力レベル69 kW)において、RF誘起密度上昇および不純物生成(軟X線およびループ電圧の増加によって示される)は、3分の1に低減された。さらに、ファラデーシールドなしで動作する従来のストリップアンテナと比較して、容量性負荷効果が低減または除去されることが実証された。また、2基のSSLアンテナを90度の位相差で動作させた場合、小さな電流駆動効果が観測された。

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