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The single crystal diamond-based diagnostic suite of the JET tokamak for 14 MeV neutron counting and spectroscopy measurements in DT plasmas

D. Rigamonti, A. Dal Molin, A. Muraro, M. Rebai, L. Giacomelli, G. Gorini, M. Nocente, E. Perelli Cippo, S. Conroy, G. Ericsson2024年Nuclear FusionIF 3出版社

The Joint European Torus (JET) has recently conducted its second deuterium–tritium (DT) experimental campaign DTE2, providing unique opportunity for studying both physics and engineering aspects of nuclear fusion plasmas. This also allowed the exploitation of new diagnostics and technologies that were not available during the first JET DT campaign held in 1997. Among these new instruments, the enhancement projects of the JET nuclear diagnostics lead to the development and installation of synthetic single crystal diamond detectors along different collimated line of sights. This paper describes the single crystal diamond-based diagnostic suite of the JET tokamak and the enhanced 14 MeV neutron diagnostic capabilities in terms of neutron yield and high resolution neutron spectroscopy. The diamond characterization measurements and the calibration procedure at JET are shown, together with performance of the diamond based neutron spectrometer as 14 MeV neutron yield monitor which allows the separation of 2.5 MeV and 14 MeV neutrons in trace tritium plasmas. The first high-resolution 14 MeV neutron spectroscopy measurements in neutral beam injection-heated DT plasmas are presented, allowing thermal and non-thermal neutron component separation. Prospects for the diagnose of DT burning plasmas such as ITER and SPARC will be presented.

日本語訳

欧州共同トーラス(JET)は最近、2回目の重水素–トリチウム(DT)実験キャンペーンであるDTE2を実施し、核融合プラズマの物理的および工学的側面の両方を研究するまたとない機会を提供した。これにより、1997年に開催された最初のJET DTキャンペーンでは利用できなかった新しい診断装置や技術の活用も可能になった。これらの新しい機器の中で、JET核診断装置の改良プロジェクトは、異なるコリメートされた視線に沿った合成単結晶ダイヤモンド検出器の開発と設置につながった。本論文では、JETトカマクの単結晶ダイヤモンドベースの診断システムと、中性子収量および高分解能中性子分光の観点から強化された14 MeV中性子診断能力について述べる。JETでのダイヤモンドの特性評価測定と較正手順を示すとともに、微量トリチウムプラズマにおいて2.5 MeVと14 MeV中性子の分離を可能にする14 MeV中性子収量モニターとしてのダイヤモンドベース中性子スペクトロメータの性能を示す。中性子ビーム入射加熱DTプラズマにおける最初の高分解能14 MeV中性子分光測定が提示され、熱的および非熱的中性子成分の分離が可能になる。ITERやSPARCのようなDT燃焼プラズマの診断への展望が示される。

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jet高精度(タイトル一致)iter中精度(概要文一致)

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JETPlasma diagnosticsDeuterium-tritium
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