Quasilinear theory of energetic particles interaction with toroidicity-induced Alfvén eigenmodes

• Grant number: 14/03289-4
• Support type: Scholarships abroad - Research Internship - Doctorate
• Effective date (Start): June 02, 2014
• Effective date (End): June 01, 2015
• 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
• Supervisor abroad: Nikolai Gorelenkov
• Home Institution: Instituto de Física (IF). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Research place: Princeton University, United States
• Associated to the scholarship: 12/22830-2 - Geodesic Acoustic Modes and Alfvén Continuum in Plasma Columns with Rotation, BP.DR

Abstract

Energetic particles (EPs) are used in fusion grade plasma experiments as a source of heat to overcome energy losses. It turns out however that they play a major role on instability excitations of magnetohydrodynamic modes. EPs can interact resonantly with these modes, causing particle and heat losses that degrade the confinement. We propose to study the interaction of EPs and toroidicity-induced Alfvén eigenmodes (TAEs) using a two-dimensional line-broadened quasilinear approach, which captures the interaction in both regimes of isolated and overlapping modes. Initially, analytical works will be performed and then, the numerical implementation on NOVA code is intended. (AU)

Scientific publications

(6)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

DUARTE, V. N.; GORELENKOV, N. N.; SCHNELLER, M.; FREDRICKSON, E. D.; PEDESTA, M.; BERK, H. L. Study of the likelihood of Alfvenic mode bifurcation in NSTX and predictions for ITER baseline scenarios. NUCLEAR FUSION, v. 58, n. 8 AUG 2018. Web of Science Citations: 2.

GORELENKOV, N. N.; DUARTE, V. N.; PODESTA, M.; BERK, H. L. Resonance broadened quasi-linear (RBQ) model for fast ion distribution relaxation due to Alfvenic eigenmodes. NUCLEAR FUSION, v. 58, n. 8 AUG 2018. Web of Science Citations: 10.

MENG, G.; GORELENKOV, N. N.; DUARTE, V. N.; BERK, H. L.; WHITE, R. B.; WANG, X. G. Resonance frequency broadening of wave-particle interaction in tokamaks due to Alfvenic eigenmode. NUCLEAR FUSION, v. 58, n. 8 AUG 2018. Web of Science Citations: 7.

WOODS, B. J. Q.; DUARTE, V. N.; DE-GAL, A. J.; GORELENKOV, N. N.; VANN, R. G. L. Stochastic effects on phase-space holes and clumps in kinetic systems near marginal stability. NUCLEAR FUSION, v. 58, n. 8 AUG 2018. Web of Science Citations: 3.

DUARTE, V. N.; BERK, H. L.; GORELENKOV, N. N.; HEIDBRINK, W. W.; KRAMER, G. J.; NAZIKIAN, R.; PACE, D. C.; PODESTA, M.; VAN ZEELAND, M. A. Theory and observation of the onset of nonlinear structures due to eigenmode destabilization by fast ions in tokamaks. Physics of Plasmas, v. 24, n. 12 DEC 2017. Web of Science Citations: 14.

DUARTE, V. N.; BERK, H. L.; GORELENKOV, N. N.; HEIDBRINK, W. W.; KRAMER, G. J.; NAZIKIAN, R.; PACE, D. C.; PODESTA, M.; TOBIAS, B. J.; VAN ZEELAND, M. A. Prediction of nonlinear evolution character of energetic-particle-driven instabilities. NUCLEAR FUSION, v. 57, n. 5 MAY 2017. Web of Science Citations: 20.