Self-sustained magnetic braiding in toroidal plasmas

K. Itoh, A. Fukuyama, S. I. Itoh, M. Yagi

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

A theory for magnetic braiding in toroidal plasmas, which is caused by microscopic pressure-gradient-driven turbulence, is developed. The balance between nonlinear destabilization and nonlinear stabilization is solved analytically for the case of interchange mode turbulence. It is found that, when the pressure gradient exceeds a threshold value, the magnetic braiding and enhanced anomalous transport become self-sustaining. Enhancements of the thermal conductivity and magnetic perturbation amplitude, as well as the threshold pressure gradient, are obtained. A cusp-type catastrophe in the thermal conductivity is predicted. The bifurcation associated with the abrupt burst of magnetic perturbations is predicted to occur when the pressure gradient reaches a critical value.

Original languageEnglish
Article number001
Pages (from-to)707-713
Number of pages7
JournalPlasma Physics and Controlled Fusion
Volume37
Issue number7
DOIs
Publication statusPublished - Dec 1 1995

Fingerprint

toroidal plasmas
Pressure gradient
pressure gradients
Plasmas
Thermal conductivity
Turbulence
thermal conductivity
turbulence
perturbation
thresholds
sustaining
destabilization
Interchanges
cusps
bursts
Stabilization
stabilization
augmentation

All Science Journal Classification (ASJC) codes

  • Nuclear Energy and Engineering
  • Condensed Matter Physics

Cite this

Self-sustained magnetic braiding in toroidal plasmas. / Itoh, K.; Fukuyama, A.; Itoh, S. I.; Yagi, M.

In: Plasma Physics and Controlled Fusion, Vol. 37, No. 7, 001, 01.12.1995, p. 707-713.

Research output: Contribution to journalArticle

Itoh, K, Fukuyama, A, Itoh, SI & Yagi, M 1995, 'Self-sustained magnetic braiding in toroidal plasmas', Plasma Physics and Controlled Fusion, vol. 37, no. 7, 001, pp. 707-713. https://doi.org/10.1088/0741-3335/37/7/001
Itoh, K. ; Fukuyama, A. ; Itoh, S. I. ; Yagi, M. / Self-sustained magnetic braiding in toroidal plasmas. In: Plasma Physics and Controlled Fusion. 1995 ; Vol. 37, No. 7. pp. 707-713.
@article{782602a0786647f6b5de9e5709ab8a90,
title = "Self-sustained magnetic braiding in toroidal plasmas",
abstract = "A theory for magnetic braiding in toroidal plasmas, which is caused by microscopic pressure-gradient-driven turbulence, is developed. The balance between nonlinear destabilization and nonlinear stabilization is solved analytically for the case of interchange mode turbulence. It is found that, when the pressure gradient exceeds a threshold value, the magnetic braiding and enhanced anomalous transport become self-sustaining. Enhancements of the thermal conductivity and magnetic perturbation amplitude, as well as the threshold pressure gradient, are obtained. A cusp-type catastrophe in the thermal conductivity is predicted. The bifurcation associated with the abrupt burst of magnetic perturbations is predicted to occur when the pressure gradient reaches a critical value.",
author = "K. Itoh and A. Fukuyama and Itoh, {S. I.} and M. Yagi",
year = "1995",
month = "12",
day = "1",
doi = "10.1088/0741-3335/37/7/001",
language = "English",
volume = "37",
pages = "707--713",
journal = "Plasma Physics and Controlled Fusion",
issn = "0741-3335",
publisher = "IOP Publishing Ltd.",
number = "7",

}

TY - JOUR

T1 - Self-sustained magnetic braiding in toroidal plasmas

AU - Itoh, K.

AU - Fukuyama, A.

AU - Itoh, S. I.

AU - Yagi, M.

PY - 1995/12/1

Y1 - 1995/12/1

N2 - A theory for magnetic braiding in toroidal plasmas, which is caused by microscopic pressure-gradient-driven turbulence, is developed. The balance between nonlinear destabilization and nonlinear stabilization is solved analytically for the case of interchange mode turbulence. It is found that, when the pressure gradient exceeds a threshold value, the magnetic braiding and enhanced anomalous transport become self-sustaining. Enhancements of the thermal conductivity and magnetic perturbation amplitude, as well as the threshold pressure gradient, are obtained. A cusp-type catastrophe in the thermal conductivity is predicted. The bifurcation associated with the abrupt burst of magnetic perturbations is predicted to occur when the pressure gradient reaches a critical value.

AB - A theory for magnetic braiding in toroidal plasmas, which is caused by microscopic pressure-gradient-driven turbulence, is developed. The balance between nonlinear destabilization and nonlinear stabilization is solved analytically for the case of interchange mode turbulence. It is found that, when the pressure gradient exceeds a threshold value, the magnetic braiding and enhanced anomalous transport become self-sustaining. Enhancements of the thermal conductivity and magnetic perturbation amplitude, as well as the threshold pressure gradient, are obtained. A cusp-type catastrophe in the thermal conductivity is predicted. The bifurcation associated with the abrupt burst of magnetic perturbations is predicted to occur when the pressure gradient reaches a critical value.

UR - http://www.scopus.com/inward/record.url?scp=0542405854&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0542405854&partnerID=8YFLogxK

U2 - 10.1088/0741-3335/37/7/001

DO - 10.1088/0741-3335/37/7/001

M3 - Article

AN - SCOPUS:0542405854

VL - 37

SP - 707

EP - 713

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

SN - 0741-3335

IS - 7

M1 - 001

ER -