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Physics performance of the Joint European Torus

R J Bickerton1984年Plasma Physics and Controlled FusionIF 2.2出版社

JET has been operating for one year. The diagnostic capability has been progressively increased from the barely adequate initial level to the point where physics data on the internal plasma processes is available. The plasma current has been taken up to just over 3 MA with flat-top times of several seconds. Central electron temperatures are in the range 1-3 keV, mean electron densities (n) from 0.1-2.5*1019m-3 and the derived global energy confinement tau epsilon reaches 0.35s+or-30%. The radiation loss is substantial, ranging from 60-100% of the input power. The contamination of the plasma is high, giving typical values of Zeff approximately 5, limiting the maximum density, giving higher temperatures and lower (n tau epsilon ) products than expected. Experiments and machine changes are in hand to overcome this problem.

日本語訳

JETは1年間運転されてきた。診断能力は、かろうじて十分な初期レベルから、内部プラズマ過程に関する物理データが得られる段階まで段階的に向上してきた。プラズマ電流は、数秒のフラットトップ時間を伴い、ちょうど3 MAを超えるまで到達している。中心電子温度は1〜3 keVの範囲にあり、平均電子密度(n)は0.1〜2.5×10¹⁹ m⁻³、導出された全球エネルギー閉じ込め時間(τ_E)は0.35秒に達し、誤差は±30%である。放射損失は顕著であり、入力パワーの60〜100%に及ぶ。プラズマの不純物混入は高く、典型的なZ_eff値は約5であり、これにより最大密度が制限され、予想よりも高い温度と低い(nτ_E)積がもたらされている。この問題を克服するための実験および装置の改造が進行中である。

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