Development of a low-frequency magnetic probe array for the quasi-axisymmetric stellarator CFQS-T

IF 2 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Fusion Engineering and Design Pub Date : 2025-09-18 DOI:10.1016/j.fusengdes.2025.115442

H. Lan , J.D. Li , Y.H. Cao , J.F. Shen , J.C. Li , Y. Xu , T.F. Sun , M.Y. He , Y.X. Feng , D.N. Wu , J. Cheng , H.F. Liu , A. Shimizu , X.Q. Wang , W.M. Xuan , M.Y. Zhang , Q. Zou , X. Zhang , H. Liu , J. Huang , C.J. Tang

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引用次数: 0

Abstract

The quasi-axisymmetric magnetic configuration and the subsequent experimental campaign were successfully achieved in the first experimental phase of the Chinese First Quasi-axisymmetric Stellarator (CFQS) in 2024, which is also called CFQS-Test, abbreviated as CFQS-T. A first low-frequency magnetic probe array (LFMPA) diagnostic has been developed for measuring the magnetic field and fluctuations in the CFQS-T. The LFMPA diagnostic is composed of 12 identical three-dimensional magnetic probes, and each magnetic probe can provide toroidal, poloidal, and radial magnetic field and fluctuation measurements. The dedicated mechanical system, electric system, data acquisition, and control system of the LFMPA are developed based on the CFQS-T experimental conditions, which are briefly described in this paper. The calibrations of effective area and in-situ frequency response of each LFMPA magnetic probe have been done, which are important for quantitatively studying the magnetic field and fluctuations (of frequency

f \leq 50 k H z

) measured by the LFMPA. Preliminary application of the LFMPA in CFQS-T experiments shows that the LFMPA works well for the magnetic field measurements, as partially verified by the simulation results of the three-dimensional equilibrium code VMEC. And the LFMPA diagnostic, without connecting the integrator, works well for measuring the magnetic fluctuations. A low-frequency coherent mode is first observed by the LFMPA and briefly reported in this article. The LFMPA can be a useful diagnostic for various physical topic studies on CFQS-T.

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准轴对称仿星器CFQS-T低频磁探头阵列的研制

2024年，中国首个准轴对称仿星器（CFQS）的第一阶段实验（也称为CFQS- test，简称CFQS- t）成功实现了准轴对称磁组态和随后的实验运动。研制了第一台低频磁探头阵列（LFMPA）诊断装置，用于测量CFQS-T的磁场和波动。LFMPA诊断由12个相同的三维磁探头组成，每个磁探头可以提供环向、极向和径向磁场和波动测量。基于CFQS-T试验条件，研制了LFMPA专用的机械系统、电气系统、数据采集和控制系统，并对其进行了简要介绍。对每个LFMPA磁探头的有效面积和现场频率响应进行了标定，这对定量研究LFMPA测得的磁场及其波动（频率f≤50kHz）具有重要意义。LFMPA在CFQS-T实验中的初步应用表明，LFMPA能很好地测量磁场，三维平衡程序VMEC的仿真结果也部分验证了该方法的有效性。在不连接积分器的情况下，LFMPA诊断可以很好地测量磁波动。LFMPA首次观测到一种低频相干模式，本文作了简要报道。LFMPA可用于CFQS-T的各种物理主题研究。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.