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Estimation of Particle Flux Driven by Coherent Mode Using of Statistical Conditional Averaging

Yuichi KAWACHI, Sigeru INAGAKI^1,2), Kazunobu HASAMADA, Kotaro YAMASAKI¹⁾, Fumiyoshi KIN, Yusuke KOSUGA^1,2), Makoto SASAKI^1,2), Yoshihiko NAGASHIMA^1,2), Naohiro KASUYA^1,2), Takuma YAMADA^1,3), Boyu ZHANG and Akihide FUJISAWA^1,2)

Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasuga-koen, Kasuga 816-8580, Japan

1)

Research Center for Plasma Turbulence, Kyushu University, 6-1 Kasuga-koen, Kasuga 816-8580, Japan

2)

Research Institution for Applied Mechanics, Kyushu University, 6-1 Kasuga-koen, Kasuga 816-8580, Japan

3)

Faculty of Arts and Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan

(Received 30 January 2019 / Accepted 3 April 2019 / Published 16 May 2019)

Abstract

We proposed a new method to evaluate particle flux in magnetized turbulent plasma. To extract fundamental fluctuation pattern, we used template method which is a kind of statistical conditional averaging technique. The method allows as not only to extract coherent patterns of density and potential fluctuations but also to evaluate time delay between them. We succeeded to calculate particle flux driven by fluctuation pattern and observed this pattern drives inward particle flux. Result obtained by the method is in good agreement with that obtained by a conventional method.

Copyright (c) 2019 The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

fluctuation, conditional average, particle flux

DOI: 10.1585/pfr.14.1402090

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