Preliminary experimental results of tungsten wire calorimeter for CRAFT NNBI

IF 1.3 4区工程技术 Q3 INSTRUMENTS & INSTRUMENTATION

Journal of Instrumentation Pub Date : 2024-01-01 DOI:10.1088/1748-0221/19/01/C01004

L. Yu, Y.Z. Xu, Y.J. Xu, X.B. Mou, L.P. Chen, X.F. Peng

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Abstract

The comprehensive Research Facility for Fusion Technology(CRAFT) has been carried out since 2019 in China and as an important component of CRAFT, a negative ion-based neutral beam injection sysgem(NNBI) (200–400 keV, 2 MW) is under construction. In order to realize online diagnosis of beam uniformity, a tungsten wire calorimeter is developed. The tungsten wire calorimeter is characterized by double-layer tungsten wire mesh structure. During beam bombardment, the tungsten wire mesh is heated and emits light, a visible light camera is used to photograph the tungsten wire calorimeter. The beam profile is obtained by digitizing the light intensity distribution map. In this paper, through the thermal simulation anslysis of tungsten wire, the installation position of tungsten wire calorimeter are determined and the spatial resolution under different beam divergence are also analyzed.The tungsten wire calorimeter was tested on the beam source test platform, the light intensity distribution maps of the tungsten wire calorimeter under 15 keV–40 keV beam energy were obtained. The work above will accumulate experience for the operation of tungsten wire calorimeter for full scale beam source in the next stage, and provide technical means for the conditioning of negative beam sources.

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用于 CRAFT NNBI 的钨丝热量计的初步实验结果

中国核聚变技术综合研究装置（CRAFT）自2019年开始实施，作为CRAFT的重要组成部分，基于负离子的中性束注入系统（NNBI）（200-400 keV，2 MW）正在建设中。为了实现光束均匀性的在线诊断，研制了钨丝量热计。钨丝量热计采用双层钨丝网状结构。在光束轰击过程中，钨丝网被加热并发光，可见光相机用于拍摄钨丝量热计。通过对光强分布图进行数字化处理，可获得光束轮廓。本文通过对钨丝的热模拟分析，确定了钨丝量热计的安装位置，并分析了不同光束发散下的空间分辨率。在光束源测试平台上对钨丝量热计进行了测试，获得了 15 keV-40 keV 光束能量下钨丝量热计的光强分布图。上述工作将为下一阶段钨丝量热计在全规模光束源上的运行积累经验，并为负光束源的调理提供技术手段。

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

Journal of Instrumentation 工程技术-仪器仪表

CiteScore

2.40

自引率

15.40%

发文量

827

审稿时长

7.5 months

期刊介绍： Journal of Instrumentation (JINST) covers major areas related to concepts and instrumentation in detector physics, accelerator science and associated experimental methods and techniques, theory, modelling and simulations. The main subject areas include. -Accelerators: concepts, modelling, simulations and sources- Instrumentation and hardware for accelerators: particles, synchrotron radiation, neutrons- Detector physics: concepts, processes, methods, modelling and simulations- Detectors, apparatus and methods for particle, astroparticle, nuclear, atomic, and molecular physics- Instrumentation and methods for plasma research- Methods and apparatus for astronomy and astrophysics- Detectors, methods and apparatus for biomedical applications, life sciences and material research- Instrumentation and techniques for medical imaging, diagnostics and therapy- Instrumentation and techniques for dosimetry, monitoring and radiation damage- Detectors, instrumentation and methods for non-destructive tests (NDT)- Detector readout concepts, electronics and data acquisition methods- Algorithms, software and data reduction methods- Materials and associated technologies, etc.- Engineering and technical issues. JINST also includes a section dedicated to technical reports and instrumentation theses.