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The reconstruction and research progress of the TEXT-U tokamak in China

G. Zhuang, Y. Pan, X.W. Hu, Z.J. Wang, Y.H. Ding, M. Zhang, L. Gao, X.Q. Zhang, Z.J. Yang, K.X. Yu2011年被引用 153Nuclear FusionIF 3出版社

The TEXT/(TEXT-U) tokamak, formerly built and operated by the University of Texas at Austin in USA, was dismantled and shipped to China in 2004, and renamed as the Joint TEXT (J-TEXT) tokamak. The reconstruction work, which included reassembly of the machine and development of peripheral devices, was completed in the spring of 2007. Consequently, the first plasma was obtained at the end of 2007. At present, a typical J-TEXT ohmic discharge can produce a plasma with flattop current up to 220 kA and lasting for 300 ms, line-averaged density above 2 × 1019 m−3, and an electron temperature of about 800 eV, with a toroidal magnetic field of 2.2 T. A number of diagnostic devices used to facilitate the routine operation and experimental scenarios were developed on the J-TEXT tokamak. Hence, the measurements of the electrostatic fluctuations in the edge region and conditional analysis of the intermittent burst events near the last closed flux surface were undertaken. The observation and simple analysis of MHD activity and disruption events were also performed. The preliminary experimental results and the future research plan for the J-TEXT are described in detail.

日本語訳

米国テキサス大学オースティン校で以前に建設され運転されていたTEXT/(TEXT-U)トカマクは、2004年に解体され中国へ輸送され、J-TEXT(Joint TEXT)トカマクと改名された。再建作業は、装置の再組み立てと周辺機器の開発を含み、2007年春に完了した。その結果、最初のプラズマは2007年末に得られた。現在、典型的なJ-TEXTオーミック放電では、フラットトップ電流が最大220 kA、持続時間300 ms、線平均密度が2 × 10¹⁹ m⁻³以上、電子温度が約800 eVのプラズマを、トロイダル磁場2.2 Tで生成できる。J-TEXTトカマクでは、日常的な運転と実験シナリオを容易にするための多数の診断装置が開発された。さらに、周辺領域における静電揺動の測定と、最終閉鎖磁気面近傍での間欠的バースト事象の条件付き解析が実施された。また、MHD活動とディスラプション事象の観測と簡単な解析も行われた。J-TEXTに関する予備的な実験結果と今後の研究計画が詳細に記述されている。

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