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Improvement of energy confinement time by continuous pellet fuelling in beam-heated Doublet III limiter discharges

S. Sengoku, M. Nagami, M. Abe, K. Hoshino, A. Kameari, A. Kitsunezaki, S. Konoshima, T. Matoba, A. Oikawa, M. Shimada1985年被引用 41Nuclear FusionIF 3出版社

A centrifuge injector that repetitively fires 1.3 mm deuterium pellets (1 torr⋅L per pellet) at a rate of 32 pellets per second was used to build up and maintain a Doublet III 2.4 MW neutral-beam-heated limiter discharge at a line-averaged density of 1 × 1014 cm−3. When compared to a conventional gas-fuelled plasma at similar density, the pellet-fuelled plasma was characterized by a factor-of-three reduction in edge neutral density and limiter recycling, a centrally peaked profile, a 70% increase in global energy confinement, and a tenfold increase in the fusion reaction rate.

日本語訳

1.3 mmの重水素ペレット(1ペレット当たり1 torr⋅L)を毎秒32個の割合で繰り返し発射する遠心インジェクターを用いて、線平均密度1 × 10¹⁴ cm⁻³のDoublet III 2.4 MW中性粒子ビーム加熱リミター放電を構築・維持した。同程度の密度の従来のガス入射プラズマと比較して、ペレット入射プラズマは、周辺部中性粒子密度とリミターリサイクリングの3分の1への低減、中心部でピークを持つ密度分布、全体のエネルギー閉じ込めの70%向上、および核融合反応率の10倍の増加を特徴とした。

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LimiterEnergy confinementFuellingConfinement timeDoublet III
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