Global mode analysis of ion-temperature-gradient instabilities using the gyro-fluid model in linear devices

Tomotsugu Ohno, Naohiro Kasuya, Makoto Sasaki, Masatoshi Yagi

Research output: Contribution to journalArticle

Abstract

In order to understand turbulent transport phenomena in magnetized plasmas, an excitation condition of the ion-temperature-gradient (ITG) instability is investigated in linear device PANTA. Numerical analyses using a global gyro-fluid code in linear devices are performed to obtain mode structures and parameter dependences of the ITG instability. Parameter scans of the linear growth rate show the destabilization condition of the ITG modes. The global analysis considers the boundary condition and determines the radial mode structure, which gives the values of the wavenumber in the direction perpendicular to the magnetic field. The local analysis confirms to reproduce the global analysis result by using the wavenumber obtained from the global analysis. The wavenumber is a parameter in the local model, and the global analysis of the radial mode structure is necessary for the selection of this important parameter.

Original languageEnglish
Article number1401081
JournalPlasma and Fusion Research
Volume13
DOIs
Publication statusPublished - Jan 1 2018

Fingerprint

ion temperature
temperature gradients
fluids
destabilization
boundary conditions
magnetic fields
excitation

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

Global mode analysis of ion-temperature-gradient instabilities using the gyro-fluid model in linear devices. / Ohno, Tomotsugu; Kasuya, Naohiro; Sasaki, Makoto; Yagi, Masatoshi.

In: Plasma and Fusion Research, Vol. 13, 1401081, 01.01.2018.

Research output: Contribution to journalArticle

@article{d66e22af18d7458e96f80c4cc15de729,
title = "Global mode analysis of ion-temperature-gradient instabilities using the gyro-fluid model in linear devices",
abstract = "In order to understand turbulent transport phenomena in magnetized plasmas, an excitation condition of the ion-temperature-gradient (ITG) instability is investigated in linear device PANTA. Numerical analyses using a global gyro-fluid code in linear devices are performed to obtain mode structures and parameter dependences of the ITG instability. Parameter scans of the linear growth rate show the destabilization condition of the ITG modes. The global analysis considers the boundary condition and determines the radial mode structure, which gives the values of the wavenumber in the direction perpendicular to the magnetic field. The local analysis confirms to reproduce the global analysis result by using the wavenumber obtained from the global analysis. The wavenumber is a parameter in the local model, and the global analysis of the radial mode structure is necessary for the selection of this important parameter.",
author = "Tomotsugu Ohno and Naohiro Kasuya and Makoto Sasaki and Masatoshi Yagi",
year = "2018",
month = "1",
day = "1",
doi = "10.1585/PFR.13.1401081",
language = "English",
volume = "13",
journal = "Plasma and Fusion Research",
issn = "1880-6821",
publisher = "The Japan Society of Plasma Science and Nuclear Fusion Research (JSPF)",

}

TY - JOUR

T1 - Global mode analysis of ion-temperature-gradient instabilities using the gyro-fluid model in linear devices

AU - Ohno, Tomotsugu

AU - Kasuya, Naohiro

AU - Sasaki, Makoto

AU - Yagi, Masatoshi

PY - 2018/1/1

Y1 - 2018/1/1

N2 - In order to understand turbulent transport phenomena in magnetized plasmas, an excitation condition of the ion-temperature-gradient (ITG) instability is investigated in linear device PANTA. Numerical analyses using a global gyro-fluid code in linear devices are performed to obtain mode structures and parameter dependences of the ITG instability. Parameter scans of the linear growth rate show the destabilization condition of the ITG modes. The global analysis considers the boundary condition and determines the radial mode structure, which gives the values of the wavenumber in the direction perpendicular to the magnetic field. The local analysis confirms to reproduce the global analysis result by using the wavenumber obtained from the global analysis. The wavenumber is a parameter in the local model, and the global analysis of the radial mode structure is necessary for the selection of this important parameter.

AB - In order to understand turbulent transport phenomena in magnetized plasmas, an excitation condition of the ion-temperature-gradient (ITG) instability is investigated in linear device PANTA. Numerical analyses using a global gyro-fluid code in linear devices are performed to obtain mode structures and parameter dependences of the ITG instability. Parameter scans of the linear growth rate show the destabilization condition of the ITG modes. The global analysis considers the boundary condition and determines the radial mode structure, which gives the values of the wavenumber in the direction perpendicular to the magnetic field. The local analysis confirms to reproduce the global analysis result by using the wavenumber obtained from the global analysis. The wavenumber is a parameter in the local model, and the global analysis of the radial mode structure is necessary for the selection of this important parameter.

UR - http://www.scopus.com/inward/record.url?scp=85069965389&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85069965389&partnerID=8YFLogxK

U2 - 10.1585/PFR.13.1401081

DO - 10.1585/PFR.13.1401081

M3 - Article

AN - SCOPUS:85069965389

VL - 13

JO - Plasma and Fusion Research

JF - Plasma and Fusion Research

SN - 1880-6821

M1 - 1401081

ER -