Development of a Hamiltonian Formulation for the Anomalous Particle Transport in Confined Plasmas

• Grant number: 12/20452-0
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Start date: March 01, 2013
• End date: February 28, 2017
• Field of knowledge: Physical Sciences and Mathematics - Physics - Physics of Fluids, Plasma Physics and Electrical Discharge
• Principal Investigator: Iberê Luiz Caldas
• Grantee: Thiago de Freitas Viscondi
• Host Institution: Instituto de Física (IF). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Associated research grant: 11/19296-1 - Nonlinear dynamics, AP.TEM

Abstract

The anomalous transport of particles represents a major limitation to the magnetic confinement of plasmas in toroidal devices, such as tokamaks and stellarators. Recent surveys indicate that this phenomenon represents a direct manifestation of the electrostatic turbulence in the plasma edge. In this region of the system, the dynamical behavior of the low-frequency turbulent waves can be described by the generalized Charney-Hasegawa-Mima equation. Considering a four-mode approximation, we can use this result in the description of a non-linear interaction between a zonal-flow fluctuation and three drift waves.In this project, we propose to study the dynamical mechanisms underlying the anomalous transport in the plasma edge. For this purpose, we intend to develop a Hamiltonian formulation for the four-wave model. From this, we will examine several relevant concepts in particle transport, such as chaos and stickiness. The understanding of these dynamical properties has direct influence on the instability control of confined plasmas. For this reason, we also aim to compare our theoretical predictions with experimental results.

Scientific publications

(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)

GRIGOLO, ADRIANO; VISCONDI, THIAGO F.; DE AGUIAR, MARCUS A. M.. Multiconfigurational quantum propagation with trajectory-guided generalized coherent states. Journal of Chemical Physics, v. 144, n. 9, MAR 7 2016. (12/20452-0, 11/20065-4, 14/04036-2, 08/09491-9)

VISCONDI, THIAGO F.; CALDAS, IBERE L.; MORRISON, PHILIP J.. Beatification: Flattening the Poisson bracket for two-dimensional fluid and plasma theories. Physics of Plasmas, v. 24, n. 3, MAR 2017. (12/20452-0, 11/19296-1)

VISCONDI, THIAGO F.; CALDAS, IBERE L.; MORRISON, PHILIP J.. A method for Hamiltonian truncation: a four-wave example. Journal of Physics A-Mathematical and Theoretical, v. 49, n. 16, APR 22 2016. (12/20452-0, 11/19296-1)