Electrostatic Thermonuclear Ballooning Instability due to Slowed down Alpha Particles and Associated Diffusion Fluxes

Sanae Itoh, Tuda Takashi, Shinji Tokuda

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A thermonuclear ballooning eigenmode of an electrostatic perturbation in a toroidal plasma is obtained with inclusion of the toroidal couplings as well as the magnetic shear effects. In the presence of high-energy, slowed-down alpha particles, the mode is driven by the combined effect of the total pressure gradient of ion species (alphas and host ions) and the toroidal curvature. We include the kinetic effects, i.e. the finite gyroradius and wave-particle interactions. The ballooning mode is always unstable and no critical density of alphas is found for the onset of the instability. Associated anomalous particle fluxes are estimated. We find that the ratio of alpha flux and ion one is roughly proportional to the ratio of their pressure gradients.

Original languageEnglish
Pages (from-to)304-310
Number of pages7
Journaljournal of the physical society of japan
Volume51
Issue number1
DOIs
Publication statusPublished - Jan 1 1982

Fingerprint

alpha particles
electrostatics
pressure gradients
ballooning modes
wave-particle interactions
ions
toroidal plasmas
flux (rate)
curvature
inclusions
shear
perturbation
kinetics
energy

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Electrostatic Thermonuclear Ballooning Instability due to Slowed down Alpha Particles and Associated Diffusion Fluxes. / Itoh, Sanae; Takashi, Tuda; Tokuda, Shinji.

In: journal of the physical society of japan, Vol. 51, No. 1, 01.01.1982, p. 304-310.

Research output: Contribution to journalArticle

@article{51c611278f1e4596805f5fbaa6838932,
title = "Electrostatic Thermonuclear Ballooning Instability due to Slowed down Alpha Particles and Associated Diffusion Fluxes",
abstract = "A thermonuclear ballooning eigenmode of an electrostatic perturbation in a toroidal plasma is obtained with inclusion of the toroidal couplings as well as the magnetic shear effects. In the presence of high-energy, slowed-down alpha particles, the mode is driven by the combined effect of the total pressure gradient of ion species (alphas and host ions) and the toroidal curvature. We include the kinetic effects, i.e. the finite gyroradius and wave-particle interactions. The ballooning mode is always unstable and no critical density of alphas is found for the onset of the instability. Associated anomalous particle fluxes are estimated. We find that the ratio of alpha flux and ion one is roughly proportional to the ratio of their pressure gradients.",
author = "Sanae Itoh and Tuda Takashi and Shinji Tokuda",
year = "1982",
month = "1",
day = "1",
doi = "10.1143/JPSJ.51.304",
language = "English",
volume = "51",
pages = "304--310",
journal = "Journal of the Physical Society of Japan",
issn = "0031-9015",
publisher = "Physical Society of Japan",
number = "1",

}

TY - JOUR

T1 - Electrostatic Thermonuclear Ballooning Instability due to Slowed down Alpha Particles and Associated Diffusion Fluxes

AU - Itoh, Sanae

AU - Takashi, Tuda

AU - Tokuda, Shinji

PY - 1982/1/1

Y1 - 1982/1/1

N2 - A thermonuclear ballooning eigenmode of an electrostatic perturbation in a toroidal plasma is obtained with inclusion of the toroidal couplings as well as the magnetic shear effects. In the presence of high-energy, slowed-down alpha particles, the mode is driven by the combined effect of the total pressure gradient of ion species (alphas and host ions) and the toroidal curvature. We include the kinetic effects, i.e. the finite gyroradius and wave-particle interactions. The ballooning mode is always unstable and no critical density of alphas is found for the onset of the instability. Associated anomalous particle fluxes are estimated. We find that the ratio of alpha flux and ion one is roughly proportional to the ratio of their pressure gradients.

AB - A thermonuclear ballooning eigenmode of an electrostatic perturbation in a toroidal plasma is obtained with inclusion of the toroidal couplings as well as the magnetic shear effects. In the presence of high-energy, slowed-down alpha particles, the mode is driven by the combined effect of the total pressure gradient of ion species (alphas and host ions) and the toroidal curvature. We include the kinetic effects, i.e. the finite gyroradius and wave-particle interactions. The ballooning mode is always unstable and no critical density of alphas is found for the onset of the instability. Associated anomalous particle fluxes are estimated. We find that the ratio of alpha flux and ion one is roughly proportional to the ratio of their pressure gradients.

UR - http://www.scopus.com/inward/record.url?scp=0020012444&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0020012444&partnerID=8YFLogxK

U2 - 10.1143/JPSJ.51.304

DO - 10.1143/JPSJ.51.304

M3 - Article

AN - SCOPUS:0020012444

VL - 51

SP - 304

EP - 310

JO - Journal of the Physical Society of Japan

JF - Journal of the Physical Society of Japan

SN - 0031-9015

IS - 1

ER -