A Cost-Effective Polychromator with a Single Interference Filter for Thomson Scattering Diagnostics

IF 1.9 4区 工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY
Shun Kamiya, Haruka Yamaguchi, Jungkyun Kim, Shun-ichi Himeno, Hiroshi Tanabe, Yasushi Ono
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Abstract

We propose a cost-effective polychromator with a single interference filter, because interference filters account for large parts of polychromator costs in the conventional Thomson scattering diagnostics with a Nd:YAG laser. Since the interference filters are used to transmit the scattered light in a specific wavelength range, one polychromator tends to have as many interference filters as its spectral channels, which makes high-resolution measurement with a number of polychromators expensive. However, we can save the number of interference filters and thus their costs by reentering reflected light from an interference filter into the same filter at different angles. This is possible, because the larger angle of incidence on the interference filter makes the wavelength of the transmitted light shorter. We measured dependence of transmitted wavelengths on the angles of incidence on one interference filter custom-ordered to transmit 1059 nm and developed the cost-effective polychromator using this dependence. The developed polychromator with a single filter successfully separated three different spectral channels (1043.2, 1051.9, and 1058.4 nm), enabling us to realize the cost-effective Thomson scattering diagnostics.

Abstract Image

一种经济高效的多色仪,具有单一干扰滤光器,用于汤姆逊散射诊断
由于干扰滤光片在传统的Nd:YAG激光汤姆逊散射诊断中占多色仪成本的很大一部分,我们提出了一种具有成本效益的单干涉滤光片多色仪。由于干涉滤光片用于传输特定波长范围内的散射光,一个多色仪往往具有与其光谱通道一样多的干涉滤光片,这使得使用多个多色仪进行高分辨率测量的成本很高。然而,我们可以节省干涉滤光片的数量,从而节省它们的成本,方法是将来自干涉滤光片的反射光以不同的角度重新进入同一滤光片。这是可能的,因为干涉滤光片的入射角越大,透射光的波长就越短。我们测量了透射波长与入射角的关系,在一个定制的干涉滤光片上传输1059 nm,并利用这种关系开发了具有成本效益的多色仪。该多色仪采用单滤光片,成功分离了三个不同的光谱通道(1043.2、1051.9和1058.4 nm),使我们能够实现经济高效的汤姆逊散射诊断。
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来源期刊
Journal of Fusion Energy
Journal of Fusion Energy 工程技术-核科学技术
CiteScore
2.20
自引率
0.00%
发文量
24
审稿时长
2.3 months
期刊介绍: The Journal of Fusion Energy features original research contributions and review papers examining and the development and enhancing the knowledge base of thermonuclear fusion as a potential power source. It is designed to serve as a journal of record for the publication of original research results in fundamental and applied physics, applied science and technological development. The journal publishes qualified papers based on peer reviews. This journal also provides a forum for discussing broader policies and strategies that have played, and will continue to play, a crucial role in fusion programs. In keeping with this theme, readers will find articles covering an array of important matters concerning strategy and program direction.
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