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Statistical Analysis of Particle Flux Flowing into the End‐Target in between Attached and Detached States in the Linear Divertor Plasma Simulator NAGDIS‐II
Author(s) -
Tanaka H.,
Ohno N.,
Onda T.,
Takeyama K.,
Kajita S.,
Kuwabara T.,
Tsuji Y.
Publication year - 2016
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.201610064
Subject(s) - divertor , transient (computer programming) , amplitude , rotational symmetry , flux (metallurgy) , particle (ecology) , plasma , physics , mechanics , steady state (chemistry) , transient state , computational physics , atomic physics , materials science , nuclear physics , optics , chemistry , tokamak , computer science , electrical engineering , oceanography , engineering , metallurgy , geology , operating system
We have investigated the particle flux flowing into the axisymmetric end‐target in the transient state from attached to detached divertor conditions in the linear plasma device NAGDIS‐II. In the transient state, a dramatic decrease of the mean particle flux and a large‐amplitude fluctuation with negative and positive spikes were observed. We have analyzed the fluctuation with a newly suggested analysis technique: pre‐multiplied cubic spectrum with the wavelet transform. Analysis result indicates that these spikes consist of a few kilohertz components. (© 2015 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)