Turbulence and transport models for the Texas Helimak

• Grant number: 17/23128-3
• Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
• Start date: February 01, 2018
• End date: July 31, 2018
• Field of knowledge: Physical Sciences and Mathematics - Physics - Physics of Fluids, Plasma Physics and Electrical Discharge
• Principal Investigator: Iberê Luiz Caldas
• Grantee: Felipe Augusto Cardoso Pereira
• Supervisor: Dr. Igor Michailovitsch Sokolov
• Host Institution: Instituto de Física (IF). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Institution abroad: Humboldt University, Germany
• Associated to the scholarship: 14/07043-0 - Analysis of turbulence and structures propagation on plasma, BP.PD

Abstract

The development of a nuclear fusion reactor involves to efficiently confine the plasma in tokamaks. However, the particle transport due the plasma edge turbulence limits the confinement. It makes the investigation on the turbulence nature necessary to improve the plasma confinement. On this post-doctorate fellowship, the Texas Helimak (University of Texas at Austin) plasma turbulence is being studied, as the plasma of this machine is similar to the border and scrape-off layer of tokamaks and it has a large set of Langmuir probes available to measure fluctuations. We collected a large amount of data, for many machine configurations, and studied how the imposition of a electrostatic potential changes the turbulence properties, specially in the situation which intermittent turbulence is enhanced. In this Research Internship Abroad (BEPE), we plan to develop and apply statistical analysis methods and models to get a better understanding of the turbulence and particle transport during my stay at Humboldt-Universität zu Berlin. My work will be supervised by Prof. Igor Sokolov, a international renowned specialist in anomalous diffusion and turbulent dispersion. (AU)

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)

PEREIRA, F. A. C.; SOKOLOV, I. M.; TOUFEN, D. L.; GUIMARAES-FILHO, Z. O.; CALDAS, I. L.; GENTLE, K. W.. Statistical properties of intermittent bursts in the Texas Helimak. Physics of Plasmas, v. 26, n. 5, MAY 2019. (18/03211-6, 14/07043-0, 15/50122-0, 17/23128-3)

PEREIRA, F. A. C.; TOUFEN, D. L.; GUIMARAES-FILHO, Z. O.; CALDAS, I. L.; VIANA, R. L.; GENTLE, K. W.. Coexistence of turbulence regimes in the Texas Helimak. Physics of Plasmas, v. 28, n. 3, MAR 2021. (18/03211-6, 15/50122-0, 17/23128-3)