Observation of the parametric-modulational instability between the drift-wave fluctuation and azimuthally symmetric sheared radial electric field oscillation in a cylindrical laboratory plasma

Yoshihiko Nagashima, Sanae Itoh, Shunjiro Shinohara, Masayuki Fukao, akihide fujisawa, Kenichiro Terasaka, Yoshinobu Kawai, George R. Tynan, Patrick H. Diamond, Masatoshi Yagi, Inagaki Shigeru, Takuma Yamada, Kimitaka Itoh

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

Observation of the parametric-modulational interaction between the drift-wave fluctuation (7-8 kHz) and azimuthally symmetric sheared radial electric field structure (∼0.4 kHz) in a cylindrical laboratory plasma is presented. Oscillation of the sheared radial electric field is synchronized at modulations of the radial wave number and Reynolds stress per mass density of the drift-wave spectrum. Bispectral analysis at the location where the sheared radial electric field has finite radial wave numbers shows that nonlinear energy transfers from the drift wave to the sheared radial electric field occur. Nonlocal energy transfers of fluctuations via "channel of the azimuthally symmetric sheared radial electric field" in spectral space as well as real space are discovered.

Original languageEnglish
Article number020706
JournalPhysics of Plasmas
Volume16
Issue number2
DOIs
Publication statusPublished - Jan 1 2009

Fingerprint

oscillations
electric fields
energy transfer
Reynolds stress
modulation
interactions

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

Observation of the parametric-modulational instability between the drift-wave fluctuation and azimuthally symmetric sheared radial electric field oscillation in a cylindrical laboratory plasma. / Nagashima, Yoshihiko; Itoh, Sanae; Shinohara, Shunjiro; Fukao, Masayuki; fujisawa, akihide; Terasaka, Kenichiro; Kawai, Yoshinobu; Tynan, George R.; Diamond, Patrick H.; Yagi, Masatoshi; Shigeru, Inagaki; Yamada, Takuma; Itoh, Kimitaka.

In: Physics of Plasmas, Vol. 16, No. 2, 020706, 01.01.2009.

Research output: Contribution to journalArticle

@article{cef5cff5478241c48acf84ed8d3b4cc0,
title = "Observation of the parametric-modulational instability between the drift-wave fluctuation and azimuthally symmetric sheared radial electric field oscillation in a cylindrical laboratory plasma",
abstract = "Observation of the parametric-modulational interaction between the drift-wave fluctuation (7-8 kHz) and azimuthally symmetric sheared radial electric field structure (∼0.4 kHz) in a cylindrical laboratory plasma is presented. Oscillation of the sheared radial electric field is synchronized at modulations of the radial wave number and Reynolds stress per mass density of the drift-wave spectrum. Bispectral analysis at the location where the sheared radial electric field has finite radial wave numbers shows that nonlinear energy transfers from the drift wave to the sheared radial electric field occur. Nonlocal energy transfers of fluctuations via {"}channel of the azimuthally symmetric sheared radial electric field{"} in spectral space as well as real space are discovered.",
author = "Yoshihiko Nagashima and Sanae Itoh and Shunjiro Shinohara and Masayuki Fukao and akihide fujisawa and Kenichiro Terasaka and Yoshinobu Kawai and Tynan, {George R.} and Diamond, {Patrick H.} and Masatoshi Yagi and Inagaki Shigeru and Takuma Yamada and Kimitaka Itoh",
year = "2009",
month = "1",
day = "1",
doi = "10.1063/1.3078075",
language = "English",
volume = "16",
journal = "Physics of Plasmas",
issn = "1070-664X",
publisher = "American Institute of Physics Publising LLC",
number = "2",

}

TY - JOUR

T1 - Observation of the parametric-modulational instability between the drift-wave fluctuation and azimuthally symmetric sheared radial electric field oscillation in a cylindrical laboratory plasma

AU - Nagashima, Yoshihiko

AU - Itoh, Sanae

AU - Shinohara, Shunjiro

AU - Fukao, Masayuki

AU - fujisawa, akihide

AU - Terasaka, Kenichiro

AU - Kawai, Yoshinobu

AU - Tynan, George R.

AU - Diamond, Patrick H.

AU - Yagi, Masatoshi

AU - Shigeru, Inagaki

AU - Yamada, Takuma

AU - Itoh, Kimitaka

PY - 2009/1/1

Y1 - 2009/1/1

N2 - Observation of the parametric-modulational interaction between the drift-wave fluctuation (7-8 kHz) and azimuthally symmetric sheared radial electric field structure (∼0.4 kHz) in a cylindrical laboratory plasma is presented. Oscillation of the sheared radial electric field is synchronized at modulations of the radial wave number and Reynolds stress per mass density of the drift-wave spectrum. Bispectral analysis at the location where the sheared radial electric field has finite radial wave numbers shows that nonlinear energy transfers from the drift wave to the sheared radial electric field occur. Nonlocal energy transfers of fluctuations via "channel of the azimuthally symmetric sheared radial electric field" in spectral space as well as real space are discovered.

AB - Observation of the parametric-modulational interaction between the drift-wave fluctuation (7-8 kHz) and azimuthally symmetric sheared radial electric field structure (∼0.4 kHz) in a cylindrical laboratory plasma is presented. Oscillation of the sheared radial electric field is synchronized at modulations of the radial wave number and Reynolds stress per mass density of the drift-wave spectrum. Bispectral analysis at the location where the sheared radial electric field has finite radial wave numbers shows that nonlinear energy transfers from the drift wave to the sheared radial electric field occur. Nonlocal energy transfers of fluctuations via "channel of the azimuthally symmetric sheared radial electric field" in spectral space as well as real space are discovered.

UR - http://www.scopus.com/inward/record.url?scp=61449179227&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=61449179227&partnerID=8YFLogxK

U2 - 10.1063/1.3078075

DO - 10.1063/1.3078075

M3 - Article

VL - 16

JO - Physics of Plasmas

JF - Physics of Plasmas

SN - 1070-664X

IS - 2

M1 - 020706

ER -