基于莱曼-阿尔法的光束发射光谱（LyBES）在 HL-2A 托卡马克上的诊断进展

IF 1.6 3区物理与天体物理 Q3 PHYSICS, FLUIDS & PLASMAS

Plasma Science & Technology Pub Date : 2023-12-15 DOI:10.1088/2058-6272/ad162a

Yixuan Zhou, Yi Yu, Min Xu, Rui Ke, Lin Nie, Hao Xu, Guangyi Zhao, Hao Liu, Zihao Yuan, Chenyu Xiao, Jiquan Li, Chijie Xiao

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引用次数: 0

摘要

目前正在 HL-2A 托卡马克上利用加热 NBI（中性束注入）系统开发边缘莱曼-阿尔法束发射光谱（LyBES）诊断仪。20 通道边缘 LyBES 旨在测量等离子体边缘（从 R = 1960 毫米到 R = 2026 毫米）的密度波动，空间分辨率提高到 3.3 毫米，是对现有常规束发射光谱诊断的补充。在本文中，我们将介绍 LyBES 诊断的进展情况，包括收集光学系统、单色器和探测器系统。采集镜的反射率在122 nm波长处测得约为82%，采集光学镜的像差几何半径在瞄准区测得约为150 μm。LyBES 单色仪的线性色散设计为 ~0.09 nm mm-1。在 5×107 V A-1 的前置放大器增益下，探测器系统的带宽被测量为 ~280 kHz，探测器系统的峰-峰噪声被测试为 ~16 mV。目前，LyBES 诊断仪的最终设计、部件开发和测试已经完成，LyBES 诊断仪的总体性能将在下一次 HL-2A 活动中得到确认。

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Progress of Lyman-alpha-based beam emission spectroscopy (LyBES) diagnostic on the HL-2A tokamak

An edge Lyman-alpha-based beam emission spectroscopy (LyBES) diagnostic, using a heating NBI (neutral beam injection) system, is currently under development on the HL-2A tokamak. The 20-channel edge LyBES, which is intended to measure the density fluctuation in plasma edge (from R = 1960 mm to R = 2026 mm) with an improved spatial resolution of 3.3 mm, is a complement to the existing conventional beam emission spectroscopy (BES) diagnostic. In this article, we introduce the progress of LyBES diagnostic, including the collection optics, the monochromator, and the detector system. The reflectance of the collection mirrors is measured to be ~82% at 122 nm, and the aberration geometrical radius of the collection optics is tested to be ~150 μm in the aimed area. The linear dispersion of the LyBES monochromator is designed to be ~0.09 nm mm−1. The bandwidth of the detector system with the 5×107 V A−1 preamplifier gain is measured to be ~280 kHz, and the peak-to-peak noise of the detector system is tested to be ~16 mV. The finalized design, components development and testing of the LyBES diagnostic have been completed at present, and an overall performance of the LyBES diagnostic is to be confirmed in the next HL-2A campaign.

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来源期刊

Plasma Science & Technology 物理-物理：流体与等离子体

CiteScore

3.10

自引率

11.80%

发文量

3773

审稿时长

3.8 months

期刊介绍： PST assists in advancing plasma science and technology by reporting important, novel, helpful and thought-provoking progress in this strongly multidisciplinary and interdisciplinary field, in a timely manner. A Publication of the Institute of Plasma Physics, Chinese Academy of Sciences and the Chinese Society of Theoretical and Applied Mechanics.