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Magnetically insulated and inertially confined fusion — MICF

A. Hasegawa, K. Nishihara, H. Daido, M. Fujita, R. Ishizaki, F. Miki, K. Mima, M. Murakami, S. Nakai, K. Terai1988年被引用 32Nuclear FusionIF 3出版社

By combining the benefits of magnetic and inertial fusion, a new fusion scheme is proposed. A plasma with a density of ≳1021 cm−3 is confined by the inertia of a heavy, cannonball-type metallic shell; its heat is insulated by a self-generated magnetic field of ≳100 T. The plasma and the magnetic field are produced by ablation due to direct impact of a laser (or particle) beam on solid fuel which constitutes the coating of the inner surface of the spherical metallic shell. Preliminary experimental and simulation results, using a 100 J CO2 laser on a target of a few millimetre parylene shell, gave nτ ≅ 5 · 1012 cm−3·S, with T ≅ 500 eV. A 1-D spherical hydrodynamic code, HISHO, with the radial heat conductivity reduced by an assumed magnetic field of 103 T, leads to ignition at an absorbed energy of the order of 20 MJ deposited during a confinement time of approximately 100 ns. These results provide supporting evidence for the feasibility of the scheme as a realistic reactor.

日本語訳

磁気核融合と慣性核融合の利点を組み合わせることで、新しい核融合スキームが提案される。≳1021 cm−3の密度を持つプラズマは、重い砲弾型金属シェルの慣性によって閉じ込められ、その熱は≳100 Tの自己生成磁場によって断熱される。プラズマと磁場は、球形金属シェルの内表面のコーティングを構成する固体燃料へのレーザー(または粒子)ビームの直接衝撃によるアブレーションによって生成される。100 J CO2レーザーを数ミリメートルのパリレンシェルターゲットに用いた予備的な実験およびシミュレーション結果は、T ≅ 500 eVでnτ ≅ 5 · 1012 cm−3·Sを与えた。仮定された103 Tの磁場によって径方向の熱伝導率が低減された1-D球面流体コードHISHOは、約100 nsの閉じ込め時間の間に堆積される約20 MJの吸収エネルギーで点火に至る。これらの結果は、このスキームが現実的な炉として実現可能であることを支持する証拠を提供する。

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