Optical design of the Lyman alpha based beam emission spectroscopy (LAB) diagnostic on the HL-2A tokamak

Optical design of the Lyman alpha based beam emission spectroscopy (LAB) diagnostic on the HL-2A tokamak
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HL-2A 托卡马克莱曼 α 光束发射光谱 (LAB) 诊断的光学设计

DOI:
10.1088/2058-6272/ac0327
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发表时间:
2021-06
影响因子:
1.7
通讯作者:
Ye Minyou
Ye Minyou
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Zhou Yixuan;Wang Huajie;Yu Yi;Chen Yihang;Ke Rui;Xu Min;Xiao Chijie;Wang Zhanhui;Li Jiquan;Duan Xuru;Ye Minyou

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In this article, we present the optical design of a novel diagnostic on the HL-2A tokamak, i.e. the 20-channel edge Lyman-alpha beam emission spectroscopy, which is a promising solution for edge density turbulence research on tokamaks, as it offers the possibility of density fluctuation measurement with a 3.3 mm spatial resolution while maintains a high temporal resolution of 1 μs. The optical path, including the reflective collection optics, the high-dispersion spectrometer, and the linear detector array, is carefully optimized to obtain a good image quality and a high throughput. The maximum root mean square radius of the collection optics is 64 μm. The detected photon flux is estimated to be about 1011 photons/s/channel.
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