Removal of deuterium retention by various helium discharge cleanings under strong magnetic field in EAST superconducting tokamak

IF 2.7 2区物理与天体物理 Q1 NUCLEAR SCIENCE & TECHNOLOGY Nuclear Materials and Energy Pub Date : 2024-12-01 DOI:10.1016/j.nme.2024.101834

Yaowei Yu, Hao Sun, Chao Wang, Bin Cao, Guizhong Zuo, Jiansheng Hu

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Abstract

Fuel (deuterium) removal by various helium (He) discharge cleanings under strong magnetic field are studied in EAST superconducting tokamak, including deuterium-to-helium changeover by main plasma operation, glow discharge cleaning (GDC), and ion cyclotron wall conditioning (ICWC). The study demonstrates that He-GDC works well in strong magnetic field, but the cleaning is poloidally located near the GDC anodes. Both He-GDC and He-ICWC are effective in removing deuterium under strong magnetic field. Moreover, deuterium-to-helium changeover by main plasma operation is highly effective in rapidly reducing the deuterium from the first wall surface. A comprehensive comparison of the three techniques shows that deuterium-to-helium changeover and He-GDC exhibit higher deuterium removal rate, and the pulse duration and duty cycle of He-ICWC should be optimized to improve the deuterium removal. These studies present a comprehensive investigation on fuel removal techniques in EAST tokamak, providing valuable insights into the optimization of tritium removal strategies for future fusion reactors.

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强磁场下EAST超导托卡马克中不同氦放电清洗去除氘潴留

在EAST超导托卡马克上研究了强磁场下不同氦（He）放电清洗方法对燃料（氘）的去除，包括主等离子体操作氘-氦转换、辉光放电清洗（GDC）和离子回旋加速器壁面调节（ICWC）。研究表明，He-GDC在强磁场下工作良好，但清洗多极性地位于GDC阳极附近。在强磁场作用下，He-GDC和He-ICWC均能有效脱除氘。此外，主等离子体操作的氘-氦转换对于快速减少第一壁面的氘是非常有效的。三种技术的综合比较表明，氘-氦转换和He-GDC具有更高的脱氘率，需要优化He-ICWC的脉冲持续时间和占空比以提高脱氘率。这些研究对EAST托卡马克的燃料去除技术进行了全面的研究，为未来聚变反应堆的氚去除策略优化提供了有价值的见解。

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来源期刊

Nuclear Materials and Energy Materials Science-Materials Science (miscellaneous)

CiteScore

3.70

自引率

15.40%

发文量

175

审稿时长

20 weeks

期刊介绍： The open-access journal Nuclear Materials and Energy is devoted to the growing field of research for material application in the production of nuclear energy. Nuclear Materials and Energy publishes original research articles of up to 6 pages in length.