| Grant number: | 12/22830-2 |
| Support type: | Scholarships in Brazil - Doctorate |
| Effective date (Start): | March 01, 2013 |
| Effective date (End): | June 30, 2017 |
| Field of knowledge: | Physical Sciences and Mathematics - Physics - Physics of Fluids, Plasma Physics and Electrical Discharge |
| Principal researcher: | Ricardo Magnus Osório Galvão |
| Grantee: | Vinícius Njaim Duarte |
| Home Institution: | Instituto de Física (IF). Universidade de São Paulo (USP). São Paulo , SP, Brazil |
| Associated research grant: | 11/50773-0 - Center of excellence in physics and applications of plasmas, AP.TEM |
| Associated scholarship(s): | 14/03289-4 - Quasilinear theory of energetic particles interaction with toroidicity-induced Alfvén eigenmodes, BE.EP.DR |
Abstract In the context of the current research in controlled nuclear fusion, mechanisms that allow the existence of improved regimes of confinement (or H mode) have been drawing much attention. This kind of regime, characterized by an effective anomalous transport self-control, is triggered by mechanisms of suppression of intabilities, associated to geodesic acoustic modes (GAMs) and zonal flows (ZF). In studying these modes with realistic plasma configurations, effects due to the plasma column rotation (both poloidal and toroidal) should be taken into account. These effects, object of several studies in recent years, can substantially modify the modes frequency and besides, it may introduce new frequency branches associated to the modified dispertion relation. This project aims to study the column rotation effects on GAMs, ZF and the Alfvén Continuum. The latter may have a frequency coinciding with the GAMs one. We intend to analyze configurations with realistic experimental parameters, with a special focus on TCABR and JET tokamaks. Both fluid and kinetic descriptions will be considered. The work will be mostly analytical however, numerical works will be eventually performed. | |
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