Numerical analysis of thermoelectric instability in tokamak divertor

N. Hayashi, T. Takizuka, Akiyoshi Hatayama, M. Ogasawara

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The thermoelectric instability in tokamak divertor has been studied numerically by using a five-point model. When the divertor plasma temperature Tdiv decreases below a critical temperature, this instability arises in a symmetric equilibrium of scrape-off layer (SOL) and divertor plasmas, and stable asymmetric equilibria are found. The SOL current causes spontaneously the divertor asymmetry at the onset of the thermoelectric instability. In an asymmetric equilibrium, the SOL current flows from the higher-Tdiv side to the lower-Tdiv side. The heat flux flowing into the divertor plate of the higher-Tdiv side becomes larger than that of the lower-Tdiv side. The heat flux asymmetry is larger for cases of high recycling and low heating power.

Original languageEnglish
Pages (from-to)526-531
Number of pages6
JournalJournal of Nuclear Materials
Volume266
DOIs
Publication statusPublished - 1999 Mar 2

Fingerprint

numerical analysis
Numerical analysis
Heat flux
Plasmas
heat flux
asymmetry
Recycling
plasma temperature
Heating
Temperature
recycling
critical temperature
heating
causes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

Cite this

Numerical analysis of thermoelectric instability in tokamak divertor. / Hayashi, N.; Takizuka, T.; Hatayama, Akiyoshi; Ogasawara, M.

In: Journal of Nuclear Materials, Vol. 266, 02.03.1999, p. 526-531.

Research output: Contribution to journalArticle

Hayashi, N. ; Takizuka, T. ; Hatayama, Akiyoshi ; Ogasawara, M. / Numerical analysis of thermoelectric instability in tokamak divertor. In: Journal of Nuclear Materials. 1999 ; Vol. 266. pp. 526-531.
@article{79fabdb93e2b4e169b8b229dfe03919b,
title = "Numerical analysis of thermoelectric instability in tokamak divertor",
abstract = "The thermoelectric instability in tokamak divertor has been studied numerically by using a five-point model. When the divertor plasma temperature Tdiv decreases below a critical temperature, this instability arises in a symmetric equilibrium of scrape-off layer (SOL) and divertor plasmas, and stable asymmetric equilibria are found. The SOL current causes spontaneously the divertor asymmetry at the onset of the thermoelectric instability. In an asymmetric equilibrium, the SOL current flows from the higher-Tdiv side to the lower-Tdiv side. The heat flux flowing into the divertor plate of the higher-Tdiv side becomes larger than that of the lower-Tdiv side. The heat flux asymmetry is larger for cases of high recycling and low heating power.",
author = "N. Hayashi and T. Takizuka and Akiyoshi Hatayama and M. Ogasawara",
year = "1999",
month = "3",
day = "2",
doi = "10.1016/S0022-3115(98)00832-0",
language = "English",
volume = "266",
pages = "526--531",
journal = "Journal of Nuclear Materials",
issn = "0022-3115",
publisher = "Elsevier",

}

TY - JOUR

T1 - Numerical analysis of thermoelectric instability in tokamak divertor

AU - Hayashi, N.

AU - Takizuka, T.

AU - Hatayama, Akiyoshi

AU - Ogasawara, M.

PY - 1999/3/2

Y1 - 1999/3/2

N2 - The thermoelectric instability in tokamak divertor has been studied numerically by using a five-point model. When the divertor plasma temperature Tdiv decreases below a critical temperature, this instability arises in a symmetric equilibrium of scrape-off layer (SOL) and divertor plasmas, and stable asymmetric equilibria are found. The SOL current causes spontaneously the divertor asymmetry at the onset of the thermoelectric instability. In an asymmetric equilibrium, the SOL current flows from the higher-Tdiv side to the lower-Tdiv side. The heat flux flowing into the divertor plate of the higher-Tdiv side becomes larger than that of the lower-Tdiv side. The heat flux asymmetry is larger for cases of high recycling and low heating power.

AB - The thermoelectric instability in tokamak divertor has been studied numerically by using a five-point model. When the divertor plasma temperature Tdiv decreases below a critical temperature, this instability arises in a symmetric equilibrium of scrape-off layer (SOL) and divertor plasmas, and stable asymmetric equilibria are found. The SOL current causes spontaneously the divertor asymmetry at the onset of the thermoelectric instability. In an asymmetric equilibrium, the SOL current flows from the higher-Tdiv side to the lower-Tdiv side. The heat flux flowing into the divertor plate of the higher-Tdiv side becomes larger than that of the lower-Tdiv side. The heat flux asymmetry is larger for cases of high recycling and low heating power.

UR - http://www.scopus.com/inward/record.url?scp=0032638023&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0032638023&partnerID=8YFLogxK

U2 - 10.1016/S0022-3115(98)00832-0

DO - 10.1016/S0022-3115(98)00832-0

M3 - Article

AN - SCOPUS:0032638023

VL - 266

SP - 526

EP - 531

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

SN - 0022-3115

ER -