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Low-density tokamak reactor ignition by fast-neutral-atom injection and build-up of higher density by use of a moving limiter

J.P. Girard, M. Khelladi, D.A. Marty1973年被引用 15Nuclear FusionIF 3出版社

A simple global-balance model shows the possibility of reaching the ignition of a low-density (3 − 4 × 1013 cm−3) tokamak reactor. This requires the use of fast-neutral injection at already achievable energy (100 keV). With the help of their complete cylindrical code, the authors have found for a typical reactor (q = 1.5) that the total injected power has to be about 25 MW. To increase the density up to about 1014 cm−3, the authors propose the use of a moving limiter, the plasma radius being increased from 90 to 300 cm during about 10 s. Plasma ignition is still possible with fast-neutral injection of similar energy. The total injected power for a reactor with q = 3 has been found to be about 80 MW. This power decreases if during expansion q changes from q = 3 (a = 90 cm) to q = 2 (a = 300 cm).

日本語訳

単純な全球バランスモデルは、低密度(3〜4×10¹³ cm⁻³)トカマク炉の点火に到達する可能性を示している。これには、すでに達成可能なエネルギー(100 keV)での高速中性粒子入射が必要である。完全な円筒コードを用いて、著者らは典型的な炉(q = 1.5)について、全入射出力が約25 MWでなければならないことを見出した。密度を約10¹⁴ cm⁻³まで増加させるために、著者らは可動リミターの使用を提案しており、プラズマ半径は約10秒の間に90 cmから300 cmへ増加する。同様のエネルギーの高速中性粒子入射でも、プラズマ点火は依然として可能である。q = 3の炉に対する全入射出力は約80 MWであることが見出された。この出力は、膨張中にqがq = 3(a = 90 cm)からq = 2(a = 300 cm)へ変化する場合に減少する。

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