[Table of Contents]

Plasma and Fusion Research

Volume 9, 1203044 (2014)

Rapid Communications

Statistical Analysis of Ballistic Propagation Distance in Edge Turbulence
Satoru SUGITA, Kimitaka ITOH1,2), Masatoshi YAGI2,3), Sanae-I. ITOH2,4), Guillaume FUHR5), Peter BEYER5) and Sadruddin BENKADDA5)
Chubu Institute for Advanced Studies, Chubu University, Kasugai 487-8501, Japan
1)
National Institute for Fusion Science, Toki 509-5292, Japan
2)
Itoh Research Center for Plasma Turbulence, Kyushu University, Kasuga 816-8580, Japan
3)
Japan Atomic Energy Agency, Rokkasho 039-3212, Japan
4)
Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan
5)
International Institute for Fusion Science, Aix-Marseille University-CNRS, Marseille Cedex20 13397, France
(Received 9 April 2013 / Accepted 5 March 2014 / Published 7 May 2014)

Abstract

The nonlinear simulation of resistive ballooning turbulence is performed in tokamak edge geometry. The spatiotemporal autocorrelation is calculated for the gradient of turbulent heat flux. The typical ballistic nature in the correlation plot is introduced by the “Lagrangian correlation,” which has spatial and temporal dependence. Propagation distances of the ballistic pulses of the gradient of turbulent heat flux are quantified and are about four times the characteristic size of the front.

Keywords

edge turbulence, fluid simulation, ballistic dynamics, statistical analysis

DOI: 10.1585/pfr.9.1203044

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This paper may be cited as follows:

Satoru SUGITA, Kimitaka ITOH, Masatoshi YAGI, Sanae-I. ITOH, Guillaume FUHR, Peter BEYER and Sadruddin BENKADDA, Plasma Fusion Res. 9, 1203044 (2014).