慣性核融合で得られる燃えるプラズマ

A B Zylstra¹, O A Hurricane², D A Callahan³

¹Lawrence Livermore National Laboratory, Livermore, CA, USA. zylstra1@llnl.gov.

Nature

|January 27, 2022

まとめ

科学者は核融合エネルギーの重要なステップである燃えるプラズマ状態を達成しました核融合反応が主にプラズマを熱するこの状態は強力なレーザーを使用して達成されました

科学分野:

核融合エネルギー研究
プラズマ物理学
高エネルギーレーザーシステム

背景:

燃えるプラズマは,自己持続的な核融合エネルギーにとって不可欠であり,核融合反応が主な熱源である必要があります.
燃えるプラズマ状態を達成することは核融合研究の長年の目標です

研究の目的:

実験室で燃えるプラズマ状態を達成し,実証する.
核融合の自己加熱メカニズムとそのエネルギー獲得との関係を調査する.

主な方法:

米国国立点火施設で行われた実験では,高電力レーザー (最大1.9MJ,500TW) を使用した.
レーザーによって生成されたX線アブレーション圧力を介して燃料カプセルを間接的に駆動する.
カプセル空間規模を拡大する戦略と 2つの異なるインプロージョンコンセプトを使用します.

主要な成果:

燃えるプラズマ状態を証明した. 溶融の自己加熱は,注入された機械的な作業を上回る.
燃えるプラズマ状態のキーメトリクスを満たした.
核融合加熱がエネルギー損失を上回る静的な自己加熱の境界を越えた実験を観察した.

結論:

この成果は,アルファ粒子が支配するプラズマと燃えるプラズマ物理学の研究のためのプラットフォームを提供します.
これらの結果は,実用的な核融合エネルギーの実現に向けた重要な前進を表しています.

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