Design and test of Cesium atomic concentration detection system based on TDLAS
作者机构：Hefei Institutes of Physical Science Chinese Academy of Sciences School of Science Shandong Jianzhu University School of Electronic and Information Engineering Anhui Jianzhu University
出 版 物：《Optoelectronics Letters》 (光电子快报(英文))
年 卷 期：2024年
学科分类：08[工学] 082701[工学-核能科学与工程] 0827[工学-核科学与技术]
基 金：supported by the HFIPS Director’s Fund (No. YZJJQY202204 No. 2021YZGH02) Comprehensive Research Facility for Fusion Technology Program of China (No. 2018-000052-73-01-001228) the Natural Science Foundation of Anhui Province (No. 2208085MA19) National Key R&D Program of China (No. 2017YFE300103 No. 2017YFE300503)
摘 要：In order to better build the Neutral Beam Injector with Negative Ion Source (NNBI)， the pre-research on key technologies has been carried out for the Comprehensive Research Facility for Fusion Technology (CRAFT). Cesium seeding into negative-ion sources is a prerequisite to obtain the required negative hydrogen ion. The performance of ion source largely depends on the cesium conditions in the source. It is very necessary to quantitatively measure the amount of cesium in the source during the plasma on and off periods (vacuum stage). This article uses the absorption peak of cesium atoms near 852.1nm to build a cesium atom concentration detection system based on Tunable Diode Laser Absorption Spectroscopy (TDLAS) technology. The test experiment based on the cesium cell is carried out， obtained the variation curve of cesium concentration at different temperatures. The experimental results indicate that: the system detection range is within 5 × 106-2.5 × 107pieces/cm3and the system resolution better than 1 × 106pieces/cm3.
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