Utilization of D2 molecular band emission for electron density measurement
D2 molecular band emission observed at a wavelength range of λ∼557−643nm is utilized to measure electron density, ne, in D plasmas of the PISCES-A and PISCES-RF linear plasma devices. The D2 band is divided at λ=593nm to make an intensity ratio, D2L (∼557–593nm)/D2R (∼593–643nm), where D2L consists...
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| Language: | English |
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Elsevier
2024-12-01
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| Series: | Nuclear Materials and Energy |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352179124002199 |
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| author | D. Nishijima M.J. Baldwin F. Chang D. Hwangbo G.R. Tynan |
| author_facet | D. Nishijima M.J. Baldwin F. Chang D. Hwangbo G.R. Tynan |
| author_sort | D. Nishijima |
| collection | DOAJ |
| description | D2 molecular band emission observed at a wavelength range of λ∼557−643nm is utilized to measure electron density, ne, in D plasmas of the PISCES-A and PISCES-RF linear plasma devices. The D2 band is divided at λ=593nm to make an intensity ratio, D2L (∼557–593nm)/D2R (∼593–643nm), where D2L consists predominantly of the g3Σg+3dσ, h3Σg+3sσ, i3Πg3dπ, j3Δg3dδ → c3Πu2pπ transitions, while D2R mainly includes the d3Πu3pπ → a3Σg+2sσ Fulcher band emission. It is experimentally found that D2L/D2R depends strongly on ne with little Te dependence in ranges of ne∼(0.031−6.1)×1018 m−3 and Te∼2.3−13.9eV. This observed trend is consistent with collisional-radiative model calculations using Yacora on the Web. |
| format | Article |
| id | doaj-art-b6d0ebd7078a42a787cc1212754ce0de |
| institution | Kabale University |
| issn | 2352-1791 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Materials and Energy |
| spelling | doaj-art-b6d0ebd7078a42a787cc1212754ce0de2024-12-21T04:28:27ZengElsevierNuclear Materials and Energy2352-17912024-12-0141101796Utilization of D2 molecular band emission for electron density measurementD. Nishijima0M.J. Baldwin1F. Chang2D. Hwangbo3G.R. Tynan4Center for Energy Research, University of California San Diego, 9500 Gilman Dr., La Jolla, CA 92093-0417, USA; Corresponding author.Center for Energy Research, University of California San Diego, 9500 Gilman Dr., La Jolla, CA 92093-0417, USACenter for Energy Research, University of California San Diego, 9500 Gilman Dr., La Jolla, CA 92093-0417, USAInstitute of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-5877, JapanCenter for Energy Research, University of California San Diego, 9500 Gilman Dr., La Jolla, CA 92093-0417, USAD2 molecular band emission observed at a wavelength range of λ∼557−643nm is utilized to measure electron density, ne, in D plasmas of the PISCES-A and PISCES-RF linear plasma devices. The D2 band is divided at λ=593nm to make an intensity ratio, D2L (∼557–593nm)/D2R (∼593–643nm), where D2L consists predominantly of the g3Σg+3dσ, h3Σg+3sσ, i3Πg3dπ, j3Δg3dδ → c3Πu2pπ transitions, while D2R mainly includes the d3Πu3pπ → a3Σg+2sσ Fulcher band emission. It is experimentally found that D2L/D2R depends strongly on ne with little Te dependence in ranges of ne∼(0.031−6.1)×1018 m−3 and Te∼2.3−13.9eV. This observed trend is consistent with collisional-radiative model calculations using Yacora on the Web.http://www.sciencedirect.com/science/article/pii/S2352179124002199DeuteriumMolecular band emissionOptical emission spectroscopyCollisional-radiative modelMachine learning |
| spellingShingle | D. Nishijima M.J. Baldwin F. Chang D. Hwangbo G.R. Tynan Utilization of D2 molecular band emission for electron density measurement Nuclear Materials and Energy Deuterium Molecular band emission Optical emission spectroscopy Collisional-radiative model Machine learning |
| title | Utilization of D2 molecular band emission for electron density measurement |
| title_full | Utilization of D2 molecular band emission for electron density measurement |
| title_fullStr | Utilization of D2 molecular band emission for electron density measurement |
| title_full_unstemmed | Utilization of D2 molecular band emission for electron density measurement |
| title_short | Utilization of D2 molecular band emission for electron density measurement |
| title_sort | utilization of d2 molecular band emission for electron density measurement |
| topic | Deuterium Molecular band emission Optical emission spectroscopy Collisional-radiative model Machine learning |
| url | http://www.sciencedirect.com/science/article/pii/S2352179124002199 |
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