X-ray observations of medium Z H- and He-like ions with satellites from C-Mod tokamak plasmas
X-ray spectra of H- and He-like ions (and satellites) from argon, calcium and chlorine have been measured in Alcator C-Mod tokamak plasmas using a high wavelength resolution imaging x-ray spectrometer system. For H-like charge states, the Lyα doublet intensity ratio is found to be slightly greater t...
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| Format: | Article |
| Language: | en_US |
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IOP Publishing
2017
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| Online Access: | http://hdl.handle.net/1721.1/111169 https://orcid.org/0000-0001-8319-5971 https://orcid.org/0000-0002-9604-204X https://orcid.org/0000-0002-0026-6939 |
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| author | Reinke, M L Ashbourn, J M A Bitter, M Delgado-Aparicio, L Hill, K Safronova, U I Gao, Chi Howard, Nathaniel Thomas Hughes Jr, Jerry Rice, John E. |
| author2 | Massachusetts Institute of Technology. Department of Nuclear Science and Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Nuclear Science and Engineering Reinke, M L Ashbourn, J M A Bitter, M Delgado-Aparicio, L Hill, K Safronova, U I Gao, Chi Howard, Nathaniel Thomas Hughes Jr, Jerry Rice, John E. |
| author_sort | Reinke, M L |
| collection | MIT |
| description | X-ray spectra of H- and He-like ions (and satellites) from argon, calcium and chlorine have been measured in Alcator C-Mod tokamak plasmas using a high wavelength resolution imaging x-ray spectrometer system. For H-like charge states, the Lyα doublet intensity ratio is found to be slightly greater than 1/2 due to interaction with the [superscript 2]S[subscript 1/2] fine structure sub-level. Neighbouring satellites with spectator electrons occupying n = 2 through n = 7 have been modelled. The Lyα doublet ratio scalings with electron density and temperature are shown to be in good agreement with collisional–radiative modelling. For He-like ions, the n = 2 satellite intensities are in good agreement with calculations and can be used to determine the electron temperature. The high n Rydberg series has been resolved up to 1s[superscript 2]–1s14p, and satellites with spectator electrons up to the n = 12 level have been identified. |
| first_indexed | 2024-09-23T10:50:20Z |
| format | Article |
| id | mit-1721.1/111169 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T10:50:20Z |
| publishDate | 2017 |
| publisher | IOP Publishing |
| record_format | dspace |
| spelling | mit-1721.1/1111692023-02-26T02:50:50Z X-ray observations of medium Z H- and He-like ions with satellites from C-Mod tokamak plasmas Reinke, M L Ashbourn, J M A Bitter, M Delgado-Aparicio, L Hill, K Safronova, U I Gao, Chi Howard, Nathaniel Thomas Hughes Jr, Jerry Rice, John E. Massachusetts Institute of Technology. Department of Nuclear Science and Engineering Massachusetts Institute of Technology. Plasma Science and Fusion Center Rice, John E Gao, Chi Howard, Nathaniel Thomas Hughes Jr, Jerry X-ray spectra of H- and He-like ions (and satellites) from argon, calcium and chlorine have been measured in Alcator C-Mod tokamak plasmas using a high wavelength resolution imaging x-ray spectrometer system. For H-like charge states, the Lyα doublet intensity ratio is found to be slightly greater than 1/2 due to interaction with the [superscript 2]S[subscript 1/2] fine structure sub-level. Neighbouring satellites with spectator electrons occupying n = 2 through n = 7 have been modelled. The Lyα doublet ratio scalings with electron density and temperature are shown to be in good agreement with collisional–radiative modelling. For He-like ions, the n = 2 satellite intensities are in good agreement with calculations and can be used to determine the electron temperature. The high n Rydberg series has been resolved up to 1s[superscript 2]–1s14p, and satellites with spectator electrons up to the n = 12 level have been identified. United States. Department of Energy (Contract DE-FC02-99ER54512) 2017-09-11T18:53:10Z 2017-09-11T18:53:10Z 2015-05 2014-12 Article http://purl.org/eprint/type/JournalArticle 0953-4075 1361-6455 http://hdl.handle.net/1721.1/111169 Rice, J E et al. “X-Ray Observations of Medium Z H- and He-Like Ions with Satellites from C-Mod Tokamak Plasmas.” Journal of Physics B: Atomic, Molecular and Optical Physics 48, 14 (May 2015): 144013 © 2015 IOP Publishing https://orcid.org/0000-0001-8319-5971 https://orcid.org/0000-0002-9604-204X https://orcid.org/0000-0002-0026-6939 en_US http://dx.doi.org/10.1088/0953-4075/48/14/144013 Journal of Physics B: Atomic, Molecular and Optical Physics Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf IOP Publishing MIT Plasma Science & Fusion Center |
| spellingShingle | Reinke, M L Ashbourn, J M A Bitter, M Delgado-Aparicio, L Hill, K Safronova, U I Gao, Chi Howard, Nathaniel Thomas Hughes Jr, Jerry Rice, John E. X-ray observations of medium Z H- and He-like ions with satellites from C-Mod tokamak plasmas |
| title | X-ray observations of medium Z H- and He-like ions with satellites from C-Mod tokamak plasmas |
| title_full | X-ray observations of medium Z H- and He-like ions with satellites from C-Mod tokamak plasmas |
| title_fullStr | X-ray observations of medium Z H- and He-like ions with satellites from C-Mod tokamak plasmas |
| title_full_unstemmed | X-ray observations of medium Z H- and He-like ions with satellites from C-Mod tokamak plasmas |
| title_short | X-ray observations of medium Z H- and He-like ions with satellites from C-Mod tokamak plasmas |
| title_sort | x ray observations of medium z h and he like ions with satellites from c mod tokamak plasmas |
| url | http://hdl.handle.net/1721.1/111169 https://orcid.org/0000-0001-8319-5971 https://orcid.org/0000-0002-9604-204X https://orcid.org/0000-0002-0026-6939 |
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