Effect of drifts on the high Mach flow associated with the divertor detachment

K. Hoshino; A. Hatayama; R. Schneider; D. P. Coster

doi:10.1016/j.jnucmat.2004.10.039

Effect of drifts on the high Mach flow associated with the divertor detachment

K. Hoshino, A. Hatayama, R. Schneider, D. P. Coster

Department of Applied Physics and Physico-Informatics

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

Effects of drifts have been studied on high Mach flows near the X-point associated with the divertor plasma detachment. Numerical calculations using a 2D edge plasma simulation code (the B2.5-EIRENE code) have been made for the JT-60U W-shaped divertor geometry. In this article, we mainly focus our attention to the effect of E × B drift. The cases with and without E × B drift in the partial detached state are compared. Due to the strong decrease of electron temperature near the separatrix and the resultant radial electric field, poloidal E × B drift flows are observed in the simulation. But the radial profiles of basic plasma parameters are not so much affected. In addition, simple model has been applied to discuss the numerical results. Although the drifts possibly act as a parallel momentum source/sink, the effect on the parallel flows is shown to be relatively small.

Original language	English
Pages (from-to)	276-280
Number of pages	5
Journal	Journal of Nuclear Materials
Volume	337-339
Issue number	1-3 SPEC. ISS.
DOIs	https://doi.org/10.1016/j.jnucmat.2004.10.039
Publication status	Published - 2005 Mar 1

Keywords

B2.5-Eirene code
Detachment
Drift effects
JT-60U

ASJC Scopus subject areas

Nuclear and High Energy Physics
Materials Science(all)
Nuclear Energy and Engineering

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10.1016/j.jnucmat.2004.10.039

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title = "Effect of drifts on the high Mach flow associated with the divertor detachment",

abstract = "Effects of drifts have been studied on high Mach flows near the X-point associated with the divertor plasma detachment. Numerical calculations using a 2D edge plasma simulation code (the B2.5-EIRENE code) have been made for the JT-60U W-shaped divertor geometry. In this article, we mainly focus our attention to the effect of E × B drift. The cases with and without E × B drift in the partial detached state are compared. Due to the strong decrease of electron temperature near the separatrix and the resultant radial electric field, poloidal E × B drift flows are observed in the simulation. But the radial profiles of basic plasma parameters are not so much affected. In addition, simple model has been applied to discuss the numerical results. Although the drifts possibly act as a parallel momentum source/sink, the effect on the parallel flows is shown to be relatively small.",

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AU - Hoshino, K.

AU - Hatayama, A.

AU - Schneider, R.

AU - Coster, D. P.

PY - 2005/3/1

Y1 - 2005/3/1

N2 - Effects of drifts have been studied on high Mach flows near the X-point associated with the divertor plasma detachment. Numerical calculations using a 2D edge plasma simulation code (the B2.5-EIRENE code) have been made for the JT-60U W-shaped divertor geometry. In this article, we mainly focus our attention to the effect of E × B drift. The cases with and without E × B drift in the partial detached state are compared. Due to the strong decrease of electron temperature near the separatrix and the resultant radial electric field, poloidal E × B drift flows are observed in the simulation. But the radial profiles of basic plasma parameters are not so much affected. In addition, simple model has been applied to discuss the numerical results. Although the drifts possibly act as a parallel momentum source/sink, the effect on the parallel flows is shown to be relatively small.

AB - Effects of drifts have been studied on high Mach flows near the X-point associated with the divertor plasma detachment. Numerical calculations using a 2D edge plasma simulation code (the B2.5-EIRENE code) have been made for the JT-60U W-shaped divertor geometry. In this article, we mainly focus our attention to the effect of E × B drift. The cases with and without E × B drift in the partial detached state are compared. Due to the strong decrease of electron temperature near the separatrix and the resultant radial electric field, poloidal E × B drift flows are observed in the simulation. But the radial profiles of basic plasma parameters are not so much affected. In addition, simple model has been applied to discuss the numerical results. Although the drifts possibly act as a parallel momentum source/sink, the effect on the parallel flows is shown to be relatively small.

KW - B2.5-Eirene code

KW - Detachment

KW - Drift effects

KW - JT-60U

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ER -

Effect of drifts on the high Mach flow associated with the divertor detachment

Abstract

Keywords

ASJC Scopus subject areas

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