Physics of drift Alfvén instabilities and energetic particles in fusion plasmas
| العنوان: | Physics of drift Alfvén instabilities and energetic particles in fusion plasmas |
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| المؤلفون: | Yueyan Li, Matteo Valerio Falessi, Philipp Lauber, Yang Li, Zhiyong Qiu, Guangyu Wei, Fulvio Zonca |
| المصدر: | Plasma Physics and Controlled Fusion. |
| بيانات النشر: | IOP Publishing, 2023. |
| سنة النشر: | 2023 |
| مصطلحات موضوعية: | Nuclear Energy and Engineering, Condensed Matter Physics |
| الوصف: | Shear Alfvén wave (SAW)/drift Alfvén wave (DAW) fluctuations can be destabilized by energetic particles (EPs) as well as thermal plasma components, which play a key role in the EP energy and momentum transport processes in burning fusion plasmas. The drift Alfvén energetic particle stability (`DAEPS`) code, which is an eigenvalue code using the finite element method (FEM), was developed to analyze Alfvén instabilities excited by EPs. The model equations, consisting of quasi-neutrality condition and Schrödinger-like form of vorticity equation, are derived within the general fishbone-like dispersion relation (GFLDR) theoretical framework, which is widely used to analyze SAW/DAW physics. The mode structure decomposition (MSD) approach and asymptotic matching between the inertial/singular layer and ideal regions are adopted. Therefore, the `DAEPS` code can provide not only frequency and growth/damping rate, but also the parallel mode structure as well as the asymptotic behavior corresponding to the singular layer contribution. Thus, it fully describes fluid and kinetic continuous spectra as well as unstable and damped modes. The model equations have been extended to include general axisymmetric geometry, and to solve for the response of circulating and trapped particles by means of the action angle approach. In this work, we discuss linear dispersion relation and parallel mode structure of drift Alfvén instabilities excited by EPs, computed by the `DAEPS` code with realistic experimental plasma profile and magnetic configuration. Based on this information, we adopt the Dyson-Schrödinger Model (DSM) to further analyze EP energy and momentum flux. We will also briefly discuss how the parallel mode structure of the drift Alfvén instabilities can be used in the DSM to calculate the nonlinear radial envelope evolution and the EP transport. |
| تدمد: | 1361-6587 0741-3335 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::9a0795b353f5078ab3b76ef94e4754c7 https://doi.org/10.1088/1361-6587/acda5e |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi...........9a0795b353f5078ab3b76ef94e4754c7 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 13616587 07413335 |
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