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Perspectives for the high field approach in fusion research and advances within the Ignitor Program

B. Coppi, A. Airoldi, R. Albanese, G. Ambrosino, G. Belforte, E. Boggio-Sella, A. Cardinali, G. Cenacchi, F. Conti, E. Costa2015年被引用 14Nuclear FusionIF 3出版社

The Ignitor Program maintains the objective of approaching D–T ignition conditions by incorporating systematical advances made with relevant high field magnet technology and with experiments on high density well confined plasmas in the present machine design. An additional objective is that of charting the development of the high field line of experiments that goes from the Alcator machine to the ignitor device. The rationale for this class of experiments, aimed at producing poloidal fields with the highest possible values (compatible with proven safety factors of known plasma instabilities) is given. On the basis of the favourable properties of high density plasmas produced systematically by this line of machines, the envisioned future for the line, based on novel high field superconducting magnets, includes the possibility of investigating more advanced fusion burn conditions than those of the D–T plasmas for which Ignitor is designed. Considering that a detailed machine design has been carried out (Coppi et al 2013 Nucl. Fusion53 104013), the advances made in different areas of the physics and technology that are relevant to the Ignitor project are reported. These are included within the following sections of the present paper: main components issues, assembly and welding procedures; robotics criteria; non-linear feedback control; simulations with three-dimensional structures and disruption studies; ICRH and dedicated diagnostics systems; anomalous transport processes including self-organization for fusion burning regimes and the zero-dimensional model; tridimensional structures of the thermonuclear instability and control provisions; superconducting components of the present machine; envisioned experiments with high field superconducting magnets.

日本語訳

イグニター計画は、関連する高磁場磁石技術と高密度・高閉じ込めプラズマに関する実験において成し遂げられた体系的な進歩を現在の装置設計に組み込むことにより、D-T点火条件への接近という目標を維持している。追加の目標は、アルカトル装置からイグニター装置に至る高磁場実験の系統的発展を明示することである。この種の実験の論理的根拠は、既知のプラズマ不安定性の安全係数と両立する最高値のポロイダル磁場を生成することを目的としており、ここに示される。この系統の装置によって体系的に生成される高密度プラズマの好ましい特性に基づき、新型の高磁場超伝導磁石に基づくこの系統の将来構想には、イグニターが設計されているD-Tプラズマの燃焼条件よりもさらに高度な核融合燃焼条件を研究する可能性が含まれる。詳細な装置設計が実施されていることを考慮し(Coppi et al 2013 Nucl. Fusion 53 104013)、イグニター計画に関連する物理学と技術の様々な分野における進展が報告される。これらは本論文の以下の各節に含まれる:主要構成要素の問題点、組立と溶接手順、ロボット工学の基準、非線形フィードバック制御、三次元構造を考慮したシミュレーションとディスラプション研究、ICRHおよび専用計測システム、核融合燃焼プラズマの自己組織化を含む異常輸送過程とゼロ次元モデル、熱核不安定性の三次元構造とその制御、本装置の超伝導構成要素、高磁場超伝導磁石を用いた将来実験の構想。

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