دورية أكاديمية
Experimental characterization of the active and passive fast-ion H-alpha emission in W7-X using FIDASIM
| العنوان: | Experimental characterization of the active and passive fast-ion H-alpha emission in W7-X using FIDASIM |
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| المؤلفون: | W7-X Team, Poloskei, Peter Zs, Geiger, B., Jansen van Vuuren, A., Äkäslompolo, S., Ford, O. P., Spanier, A., Neelis, T. W. C., McNeely, P., Hartmann, D. |
| المصدر: | Nuclear Fusion, 64 (2), Art.-Nr.: 026008 ; ISSN: 0029-5515, 1741-4326 |
| بيانات النشر: | International Atomic Energy Agency |
| سنة النشر: | 2024 |
| المجموعة: | KITopen (Karlsruhe Institute of Technologie) |
| مصطلحات موضوعية: | lasma physics, stellarator, forward modelling, fast-particle diagnostic, ddc:600, Technology, info:eu-repo/classification/ddc/600 |
| الوصف: | This paper presents the first results from the analysis of Balmer-alpha spectra at Wendelstein 7-X which contain the broad charge exchange emission from fast-ions. The measured spectra are compared to synthetic spectra predicted by the FIDASIM code, which has been supplied with the 3D magnetic fields from VMEC, 5D fast-ion distribution functions from ASCOT, and a realistic Neutral Beam Injection geometry including beam particle blocking elements. Detailed modeling of the beam emission shows excellent agreement between measured beam emission spectra and predictions. In contrast, modeling of beam halo radiation and Fast-Ion H-Alpha signals (FIDA) is more challenging due to strong passive contributions. While about 50% of the halo radiation can be attributed to passive signals from edge neutrals, the FIDA emission—in particular for an edge-localized line of sights—is dominated by passive emission. This is in part explained by high neutral densities in the plasma edge and in part by edge-born fast-ion populations as demonstrated by detailed modeling of the edge fast-ion distribution. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| العلاقة: | info:eu-repo/grantAgreement/EC/H2020/633053/EU//EUROfusion_H2020; info:eu-repo/semantics/altIdentifier/wos/001128967800001; info:eu-repo/semantics/altIdentifier/issn/0029-5515; info:eu-repo/semantics/altIdentifier/issn/1741-4326; https://publikationen.bibliothek.kit.edu/1000167436Test; https://publikationen.bibliothek.kit.edu/1000167436/152044389Test; https://doi.org/10.5445/IR/1000167436Test |
| DOI: | 10.5445/IR/1000167436 |
| الإتاحة: | https://doi.org/10.5445/IR/1000167436Test https://doi.org/10.1088/1741-4326/ad0dd4Test https://publikationen.bibliothek.kit.edu/1000167436Test https://publikationen.bibliothek.kit.edu/1000167436/152044389Test |
| حقوق: | https://creativecommons.org/licenses/by/4.0/deed.deTest ; info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.9AFD38B7 |
| قاعدة البيانات: | BASE |
| DOI: | 10.5445/IR/1000167436 |
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