Effect of the loss cone on confinement in toroidal helical devices

K. Itoh, S. I. Itoh, A. Fukuyama, K. Hanatani

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

The paper present an analysis of the loss cone boundary in phase space for toroidal helical devices. The effects of the radial electric field and the modulation of the helical field ripple are taken into account. The minimum energy of particles entering the loss cone is calculated. Modulation of the helical ripple is not always effective in reducing the loss when a radial electric field is present. The particle loss due to the loss cone is estimated in the collisionless limit. The impact of the radial electric field on the loss cone is discussed. It is more difficult to find a solution in the case of a positive radial electric field, which is required for the high ion temperature mode. This difficulty is great for systems with a small helical field ripple.

Original languageEnglish
Pages (from-to)1851-1861
Number of pages11
JournalNuclear Fusion
Volume29
Issue number11
DOIs
Publication statusPublished - 1989
Externally publishedYes

Fingerprint

cones
ripples
electric fields
modulation
ion temperature
energy

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Nuclear and High Energy Physics
  • Physics and Astronomy(all)

Cite this

Itoh, K., Itoh, S. I., Fukuyama, A., & Hanatani, K. (1989). Effect of the loss cone on confinement in toroidal helical devices. Nuclear Fusion, 29(11), 1851-1861. https://doi.org/10.1088/0029-5515/29/11/001

Effect of the loss cone on confinement in toroidal helical devices. / Itoh, K.; Itoh, S. I.; Fukuyama, A.; Hanatani, K.

In: Nuclear Fusion, Vol. 29, No. 11, 1989, p. 1851-1861.

Research output: Contribution to journalArticle

Itoh, K, Itoh, SI, Fukuyama, A & Hanatani, K 1989, 'Effect of the loss cone on confinement in toroidal helical devices', Nuclear Fusion, vol. 29, no. 11, pp. 1851-1861. https://doi.org/10.1088/0029-5515/29/11/001
Itoh, K. ; Itoh, S. I. ; Fukuyama, A. ; Hanatani, K. / Effect of the loss cone on confinement in toroidal helical devices. In: Nuclear Fusion. 1989 ; Vol. 29, No. 11. pp. 1851-1861.
@article{4132173adf4149ebafe6d3e005895e20,
title = "Effect of the loss cone on confinement in toroidal helical devices",
abstract = "The paper present an analysis of the loss cone boundary in phase space for toroidal helical devices. The effects of the radial electric field and the modulation of the helical field ripple are taken into account. The minimum energy of particles entering the loss cone is calculated. Modulation of the helical ripple is not always effective in reducing the loss when a radial electric field is present. The particle loss due to the loss cone is estimated in the collisionless limit. The impact of the radial electric field on the loss cone is discussed. It is more difficult to find a solution in the case of a positive radial electric field, which is required for the high ion temperature mode. This difficulty is great for systems with a small helical field ripple.",
author = "K. Itoh and Itoh, {S. I.} and A. Fukuyama and K. Hanatani",
year = "1989",
doi = "10.1088/0029-5515/29/11/001",
language = "English",
volume = "29",
pages = "1851--1861",
journal = "Nuclear Fusion",
issn = "0029-5515",
publisher = "IOP Publishing Ltd.",
number = "11",

}

TY - JOUR

T1 - Effect of the loss cone on confinement in toroidal helical devices

AU - Itoh, K.

AU - Itoh, S. I.

AU - Fukuyama, A.

AU - Hanatani, K.

PY - 1989

Y1 - 1989

N2 - The paper present an analysis of the loss cone boundary in phase space for toroidal helical devices. The effects of the radial electric field and the modulation of the helical field ripple are taken into account. The minimum energy of particles entering the loss cone is calculated. Modulation of the helical ripple is not always effective in reducing the loss when a radial electric field is present. The particle loss due to the loss cone is estimated in the collisionless limit. The impact of the radial electric field on the loss cone is discussed. It is more difficult to find a solution in the case of a positive radial electric field, which is required for the high ion temperature mode. This difficulty is great for systems with a small helical field ripple.

AB - The paper present an analysis of the loss cone boundary in phase space for toroidal helical devices. The effects of the radial electric field and the modulation of the helical field ripple are taken into account. The minimum energy of particles entering the loss cone is calculated. Modulation of the helical ripple is not always effective in reducing the loss when a radial electric field is present. The particle loss due to the loss cone is estimated in the collisionless limit. The impact of the radial electric field on the loss cone is discussed. It is more difficult to find a solution in the case of a positive radial electric field, which is required for the high ion temperature mode. This difficulty is great for systems with a small helical field ripple.

UR - http://www.scopus.com/inward/record.url?scp=0024765171&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0024765171&partnerID=8YFLogxK

U2 - 10.1088/0029-5515/29/11/001

DO - 10.1088/0029-5515/29/11/001

M3 - Article

VL - 29

SP - 1851

EP - 1861

JO - Nuclear Fusion

JF - Nuclear Fusion

SN - 0029-5515

IS - 11

ER -