Recurrence quantification analysis of turbulent fluctuations in the plasma edge of Tokamak Chauffage Alfven Bresilien tokamak

Journal Article · Fri Jan 15 04:00:00 EST 2010 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3280010· OSTI ID:21344651

Guimaraes-Filho, Z O; Caldas, I L; Nascimento, I C; Kuznetsov, Yu K ^[1]; Viana, R L ^[2]; Kurths, J ^[3]

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1. Instituto de Fisica, Universidade de Sao Paulo, 05315-970 Sao Paulo, Sao Paulo (Brazil)
2. Departamento de Fisica, Universidade Federal do Parana, 81531-990 Curitiba, Parana (Brazil)
3. Humboldt Universitaet, Berlin 10115 (Germany)

Recurrences are close returns of a given state in a time series, and can be used to identify different dynamical regimes and other related phenomena, being particularly suited for analyzing experimental data. In this work, we use recurrence quantification analysis to investigate dynamical patterns in scalar data series obtained from measurements of floating potential and ion saturation current at the plasma edge of the Tokamak Chauffage Alfven Bresilien [R. M. O. Galvao et al., Plasma Phys. Controlled Fusion 43, 1181 (2001)]. We consider plasma discharges with and without the application of radial electric bias, and also with two different regimes of current ramp. Our results indicate that biasing improves confinement through destroying highly recurrent regions within the plasma column that enhance particle and heat transport.

• OSTI ID: 21344651
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 1 Vol. 17; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CLOSED PLASMA DEVICES
CONFINEMENT
ELECTRIC DISCHARGES
FLUCTUATIONS
PLASMA
PLASMA CONFINEMENT
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TURBULENCE
VARIATIONS