{"title":"Full-image operation of fast charge exchange recombination spectroscopy with high-spatial and high-wavelength resolutions in large helical device.","authors":"T Kobayashi, M Yoshinuma, K Ida","doi":"10.1063/5.0251924","DOIUrl":null,"url":null,"abstract":"<p><p>Aiming at fully utilizing the spatial resolution of a fast charge exchange recombination spectroscopy (CXS) system, a full-image operation scenario is newly developed. A data analysis procedure is presented. Calibration using a white light source and a neon-enclosed hollow cathode lamp is performed, which provides vertical-stripe separation, horizontal-pixel vs wavelength conversion, and stripe sensitivity. Data from fast and slow CXS systems are compared, providing qualitatively equivalent emission spectra in the same time-integration duration. An asymptotically decreasing trend of noise level with respect to the amount of ensemble averaging (time integration) is confirmed for the fast CXS system. Radial profiles of emission intensity, ion temperature, and toroidal velocity obtained from slow and fast CXS systems are compared, and reasonable agreement is found.</p>","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"96 3","pages":""},"PeriodicalIF":1.3000,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Review of Scientific Instruments","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1063/5.0251924","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"INSTRUMENTS & INSTRUMENTATION","Score":null,"Total":0}
引用次数: 0
Abstract
Aiming at fully utilizing the spatial resolution of a fast charge exchange recombination spectroscopy (CXS) system, a full-image operation scenario is newly developed. A data analysis procedure is presented. Calibration using a white light source and a neon-enclosed hollow cathode lamp is performed, which provides vertical-stripe separation, horizontal-pixel vs wavelength conversion, and stripe sensitivity. Data from fast and slow CXS systems are compared, providing qualitatively equivalent emission spectra in the same time-integration duration. An asymptotically decreasing trend of noise level with respect to the amount of ensemble averaging (time integration) is confirmed for the fast CXS system. Radial profiles of emission intensity, ion temperature, and toroidal velocity obtained from slow and fast CXS systems are compared, and reasonable agreement is found.
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Review of Scientific Instruments, is committed to the publication of advances in scientific instruments, apparatuses, and techniques. RSI seeks to meet the needs of engineers and scientists in physics, chemistry, and the life sciences.
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