{"title":"Electron density measurement by the three boundary channels of HCOOH laser interferometer on the HL-3 tokamak","authors":"Junren Mou, Yonggao Li, Yuan Li, Zaihong Wang, Baogang Ding, Haoxi Wang, Jiang Yi, Zhongbing Shi","doi":"10.1088/2058-6272/ad127a","DOIUrl":null,"url":null,"abstract":"\n Far-infrared (FIR) interferometer is widely used to measure the electron density in the magnetically confined fusion plasma devices. A new FIR laser interferometer with a total of 13 channels (including 8 horizontal channels and 5 oblique channels) is under development for the HL-3 tokamak by using the formic-acid laser (HCOOH, f = 694 GHz). In order to investigate the boundary electron density activity, three horizontal interferometry channels located at Z = −97, −76, 76.5 cm have just been developed and put into operation in 2023 experimental campaign, with a time resolution of < 1.0 μs and line-integrated electron density resolution of ~ 7.0×1016 m−2. This paper mainly focuses on the optical design of the three-channel interferometry system, optical elements and recent experimental result on HL-3.","PeriodicalId":1,"journal":{"name":"Accounts of Chemical Research","volume":null,"pages":null},"PeriodicalIF":16.4000,"publicationDate":"2023-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Accounts of Chemical Research","FirstCategoryId":"1089","ListUrlMain":"https://doi.org/10.1088/2058-6272/ad127a","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Far-infrared (FIR) interferometer is widely used to measure the electron density in the magnetically confined fusion plasma devices. A new FIR laser interferometer with a total of 13 channels (including 8 horizontal channels and 5 oblique channels) is under development for the HL-3 tokamak by using the formic-acid laser (HCOOH, f = 694 GHz). In order to investigate the boundary electron density activity, three horizontal interferometry channels located at Z = −97, −76, 76.5 cm have just been developed and put into operation in 2023 experimental campaign, with a time resolution of < 1.0 μs and line-integrated electron density resolution of ~ 7.0×1016 m−2. This paper mainly focuses on the optical design of the three-channel interferometry system, optical elements and recent experimental result on HL-3.
期刊介绍：
Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance.
Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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