Bayesian modeling of collisional-radiative models applicable to thermal helium beam plasma diagnostics
Thermal helium beam diagnostics using the line ratio spectroscopy method are widely used to infer temperature and density in fusion-relevant edge plasmas. These diagnostics consist of an observational system which measures emitted line radiation from either intrinsic or injected helium plasma impuri...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-10-01
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| Series: | Nuclear Materials and Energy |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352179122001508 |
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| author | E. Flom M. Krychowiak O. Schmitz R. König T. Barbui F. Henke M. Jakubowski S. Kwak S. Loch J. Muñoz Burgos J. Svensson |
| author_facet | E. Flom M. Krychowiak O. Schmitz R. König T. Barbui F. Henke M. Jakubowski S. Kwak S. Loch J. Muñoz Burgos J. Svensson |
| author_sort | E. Flom |
| collection | DOAJ |
| description | Thermal helium beam diagnostics using the line ratio spectroscopy method are widely used to infer temperature and density in fusion-relevant edge plasmas. These diagnostics consist of an observational system which measures emitted line radiation from either intrinsic or injected helium plasma impurities. These spectral features are then compared to the output of a collisional-radiative model to infer plasma parameters (Te, ne) from the observed helium radiation. In order to investigate the systematic uncertainties of such a diagnostic, we present the results of a Bayesian treatment of a helium collisional-radiative model (Schmitz et al., 2008) using synthetic data modeled after an existing system on the plasma experiment Wendelstein 7-X (Barbui et al. 2016). From this study, we present a new method for comprehensively combining measurement uncertainties with underlying atomic rate parameter uncertainties in the inference of plasma parameters. Finally, we also demonstrate the utility of this Bayesian approach in targeting sensitivities within the model, allowing determination of high-priority atomic data for future refinement and comparison between differing atomic models. |
| first_indexed | 2024-04-13T18:35:49Z |
| format | Article |
| id | doaj.art-0719328df25c4bdba0e1658d4432f20d |
| institution | Directory Open Access Journal |
| issn | 2352-1791 |
| language | English |
| last_indexed | 2024-04-13T18:35:49Z |
| publishDate | 2022-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Materials and Energy |
| spelling | doaj.art-0719328df25c4bdba0e1658d4432f20d2022-12-22T02:34:53ZengElsevierNuclear Materials and Energy2352-17912022-10-0133101269Bayesian modeling of collisional-radiative models applicable to thermal helium beam plasma diagnosticsE. Flom0M. Krychowiak1O. Schmitz2R. König3T. Barbui4F. Henke5M. Jakubowski6S. Kwak7S. Loch8J. Muñoz Burgos9J. Svensson10Department of Engineering Physics, University of Wisconsin-Madison, 500 Lincoln Drive, Madison, 53703, WI, USA; Max Planck Institute for Plasma Physics, Wendelsteinstraße 1, Greifswald, 17489, Mecklenburg-Vorpommern, Germany; Corresponding author at: Department of Engineering Physics, University of Wisconsin-Madison, 500 Lincoln Drive, Madison, 53703, WI, USA.Max Planck Institute for Plasma Physics, Wendelsteinstraße 1, Greifswald, 17489, Mecklenburg-Vorpommern, GermanyDepartment of Engineering Physics, University of Wisconsin-Madison, 500 Lincoln Drive, Madison, 53703, WI, USAMax Planck Institute for Plasma Physics, Wendelsteinstraße 1, Greifswald, 17489, Mecklenburg-Vorpommern, GermanyPrinceton Plasma Physics Laboratory, 100 Stellarator Road, Princeton, 08536, NJ, USAMax Planck Institute for Plasma Physics, Wendelsteinstraße 1, Greifswald, 17489, Mecklenburg-Vorpommern, GermanyMax Planck Institute for Plasma Physics, Wendelsteinstraße 1, Greifswald, 17489, Mecklenburg-Vorpommern, GermanyMax Planck Institute for Plasma Physics, Wendelsteinstraße 1, Greifswald, 17489, Mecklenburg-Vorpommern, GermanyDepartment of Physics, Auburn University, 380 Duncan Drive, Auburn, 36849, AL, USAAstro Fusion Spectre, LLC, 1263 Avenida de los lobos unit D, San Diego, 92127, CL, USAMax Planck Institute for Plasma Physics, Wendelsteinstraße 1, Greifswald, 17489, Mecklenburg-Vorpommern, GermanyThermal helium beam diagnostics using the line ratio spectroscopy method are widely used to infer temperature and density in fusion-relevant edge plasmas. These diagnostics consist of an observational system which measures emitted line radiation from either intrinsic or injected helium plasma impurities. These spectral features are then compared to the output of a collisional-radiative model to infer plasma parameters (Te, ne) from the observed helium radiation. In order to investigate the systematic uncertainties of such a diagnostic, we present the results of a Bayesian treatment of a helium collisional-radiative model (Schmitz et al., 2008) using synthetic data modeled after an existing system on the plasma experiment Wendelstein 7-X (Barbui et al. 2016). From this study, we present a new method for comprehensively combining measurement uncertainties with underlying atomic rate parameter uncertainties in the inference of plasma parameters. Finally, we also demonstrate the utility of this Bayesian approach in targeting sensitivities within the model, allowing determination of high-priority atomic data for future refinement and comparison between differing atomic models.http://www.sciencedirect.com/science/article/pii/S2352179122001508Bayesian inferenceCollisional-radiative modelHelium spectroscopyPlasma diagnostics |
| spellingShingle | E. Flom M. Krychowiak O. Schmitz R. König T. Barbui F. Henke M. Jakubowski S. Kwak S. Loch J. Muñoz Burgos J. Svensson Bayesian modeling of collisional-radiative models applicable to thermal helium beam plasma diagnostics Nuclear Materials and Energy Bayesian inference Collisional-radiative model Helium spectroscopy Plasma diagnostics |
| title | Bayesian modeling of collisional-radiative models applicable to thermal helium beam plasma diagnostics |
| title_full | Bayesian modeling of collisional-radiative models applicable to thermal helium beam plasma diagnostics |
| title_fullStr | Bayesian modeling of collisional-radiative models applicable to thermal helium beam plasma diagnostics |
| title_full_unstemmed | Bayesian modeling of collisional-radiative models applicable to thermal helium beam plasma diagnostics |
| title_short | Bayesian modeling of collisional-radiative models applicable to thermal helium beam plasma diagnostics |
| title_sort | bayesian modeling of collisional radiative models applicable to thermal helium beam plasma diagnostics |
| topic | Bayesian inference Collisional-radiative model Helium spectroscopy Plasma diagnostics |
| url | http://www.sciencedirect.com/science/article/pii/S2352179122001508 |
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