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タイトル: | Measurement of the helium 2[3]S metastable atom density by observation of the change in the 2[3]S–2[3]P emission line shape due to radiation reabsorption |
著者: | Shikama, T https://orcid.org/0000-0001-7331-5204 (unconfirmed) Ogane, S Iida, Y Hasuo, M https://orcid.org/0000-0001-8441-2640 (unconfirmed) |
著者名の別形: | 四竈, 泰一 |
キーワード: | helium metastable atom absorption spectroscopy radiation trapping Zeeman effect |
発行日: | 15-Dec-2015 |
出版者: | IOP Publishing |
誌名: | Journal of Physics D: Applied Physics |
巻: | 49 |
号: | 2 |
論文番号: | 025206 |
抄録: | In helium discharge plasmas, the relative emission intensities of the fine-structure transitions belonging to the HeI 2[3]S–2[3]P transition can be affected by radiation reabsorption. Since the magnitude of the reabsorption depends on the density and temperature of the 2[3]S metastable atoms, their density can be determined by measuring the 2[3]S–2[3]P emission line shape using a high wavelength-resolution spectrometer. In this study, the applicable conditions of the method in terms of the opacity and line broadening are revealed, and possible causes of errors in the measurement, i.e. spatial distributions of the density and temperature and the effects of external magnetic and electric fields, are investigated. The effect of reabsorption under an external magnetic field is experimentally confirmed using a glow discharge plasma installed in a superconducting magnet. |
著作権等: | This is an author-created, un-copyedited version of an article accepted for publication in 'Journal of Physics D: Applied Physics'. The publisher is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at http://dx.doi.org/10.1088/0022-3727/49/2/025206. The full-text file will be made open to the public on 15 December 2016 in accordance with publisher's 'Terms and Conditions for Self-Archiving'. This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。 |
URI: | http://hdl.handle.net/2433/208397 |
DOI(出版社版): | 10.1088/0022-3727/49/2/025206 |
出現コレクション: | 学術雑誌掲載論文等 |
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