Development of liquid spray neutralizer for neutral beam injection (NBI) for fusion devices

IF 1.9 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Fusion Engineering and Design Pub Date : 2025-06-13 DOI:10.1016/j.fusengdes.2025.115262

Sargis Ter-Avetisyan

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引用次数: 0

Abstract

High energy negative ion and neutral atom beams have been observed by irradiating the liquid spray of sub-micron droplets with laser-accelerated positive ions, namely hydrogen and carbon. It is shown that the electron capture by positive ions in the spray environment enables the production of negative ions

H^{-}

and

C^{-}

and neutral atoms of

H^{0}

and

C^{0}

. The energy dependent conversion efficiency of positive ions to negative and neutral atoms is shown. For

C^{0}

and

C^{-}

at projectile energies above 600 keV, saturation is observed at about 40 % and 13 %, respectively, while for

H^{0}

and

H^{-}

the conversion efficiency decreases with increasing energy. This proof of principle experiment promises increased neutralization efficiency of positive ion beams in neutral beam injection beamlines. This much simple system as compared to gas neutralizers can be an attractive option and require further study.

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核聚变装置中性束注入液体喷雾中和剂的研制

用激光加速的正离子（氢和碳）照射亚微米液滴的液体喷雾，观察到高能负离子和中性原子束。结果表明，在喷雾环境中，正离子对电子的捕获使负离子H -和C -以及中性原子H0和C0的生成成为可能。显示了正离子到负离子和中性原子的能量依赖转换效率。对于C0和C - at弹能在600 keV以上时，饱和率分别约为40%和13%，而对于H0和H -，转换效率随着能量的增加而降低。该原理证明实验有望提高中性束注入束线中正离子束的中和效率。与气体中和剂相比，这个简单得多的系统可能是一个有吸引力的选择，需要进一步研究。

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来源期刊

Fusion Engineering and Design 工程技术-核科学技术

CiteScore

3.50

自引率

23.50%

发文量

275

审稿时长

3.8 months

期刊介绍： The journal accepts papers about experiments (both plasma and technology), theory, models, methods, and designs in areas relating to technology, engineering, and applied science aspects of magnetic and inertial fusion energy. Specific areas of interest include: MFE and IFE design studies for experiments and reactors; fusion nuclear technologies and materials, including blankets and shields; analysis of reactor plasmas; plasma heating, fuelling, and vacuum systems; drivers, targets, and special technologies for IFE, controls and diagnostics; fuel cycle analysis and tritium reprocessing and handling; operations and remote maintenance of reactors; safety, decommissioning, and waste management; economic and environmental analysis of components and systems.