Guiding-center simulations of nonlocal and negative inertia effects on rotation in a tokamak

T. Kurki-Suonio; Jukka A. Heikkinen; S. I. Lashkul

doi:10.1063/1.2749501

Guiding-center simulations of nonlocal and negative inertia effects on rotation in a tokamak

T. Kurki-Suonio
, Jukka A. Heikkinen
, S. I. Lashkul

VTT Technical Research Centre of Finland

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

8 Citations (Scopus)

Abstract

The magnitude of the radial electric field (Er), resulting from nonambipolar fluxes of neoclassical origin, is evaluated using Monte Carlo guiding-center simulations for a low-current plasma corresponding to the FT-2 tokamak {Fisichiskii Tokamak-2, Ioffe Institute, St. Petersburg [S. I. Lashkul, V. N. Budnikov, E. O. Vekshina et al., Plasma Phys. Rep. 27, 1001 (2001)]}.
The Er-values are found to significantly exceed those given by the standard neoclassical theory, based on thin-orbit assumption, when the plasma current is sufficiently low and the pressure gradient is sufficiently high.
Strong Er-structures are found to form in the same low plasma-current range where enhanced confinement is reported in the FT-2 tokamak. In the simulations, the physics behind the strong increase in the field values is intimately related to the poloidal Mach-number, together with the wide ion orbits.

Original language	English
Article number	072510
Journal	Physics of Plasmas
Volume	14
Issue number	7
DOIs	https://doi.org/10.1063/1.2749501
Publication status	Published - 2007
MoE publication type	A1 Journal article-refereed

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

plasma transport processes
Tokamak devices
ToKamak
plasma toroidal confinement
plasma flow
plasma simulation
Monte Carlo methods
plasma pressure
Mach number
fusion energy
fusion reactors

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10.1063/1.2749501

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@article{fa52e5998ef1449390e956fd8beab402,

title = "Guiding-center simulations of nonlocal and negative inertia effects on rotation in a tokamak",

abstract = "The magnitude of the radial electric field (Er), resulting from nonambipolar fluxes of neoclassical origin, is evaluated using Monte Carlo guiding-center simulations for a low-current plasma corresponding to the FT-2 tokamak \{Fisichiskii Tokamak-2, Ioffe Institute, St. Petersburg [S. I. Lashkul, V. N. Budnikov, E. O. Vekshina et al., Plasma Phys. Rep. 27, 1001 (2001)]\}. The Er-values are found to significantly exceed those given by the standard neoclassical theory, based on thin-orbit assumption, when the plasma current is sufficiently low and the pressure gradient is sufficiently high. Strong Er-structures are found to form in the same low plasma-current range where enhanced confinement is reported in the FT-2 tokamak. In the simulations, the physics behind the strong increase in the field values is intimately related to the poloidal Mach-number, together with the wide ion orbits.",

keywords = "plasma transport processes, Tokamak devices, ToKamak, plasma toroidal confinement, plasma flow, plasma simulation, Monte Carlo methods, plasma pressure, Mach number, fusion energy, fusion reactors",

author = "T. Kurki-Suonio and Heikkinen, \{Jukka A.\} and Lashkul, \{S. I.\}",

year = "2007",

doi = "10.1063/1.2749501",

language = "English",

volume = "14",

journal = "Physics of Plasmas",

issn = "1070-664X",

publisher = "American Institute of Physics (AIP)",

number = "7",

}

TY - JOUR

T1 - Guiding-center simulations of nonlocal and negative inertia effects on rotation in a tokamak

AU - Kurki-Suonio, T.

AU - Heikkinen, Jukka A.

AU - Lashkul, S. I.

PY - 2007

Y1 - 2007

N2 - The magnitude of the radial electric field (Er), resulting from nonambipolar fluxes of neoclassical origin, is evaluated using Monte Carlo guiding-center simulations for a low-current plasma corresponding to the FT-2 tokamak {Fisichiskii Tokamak-2, Ioffe Institute, St. Petersburg [S. I. Lashkul, V. N. Budnikov, E. O. Vekshina et al., Plasma Phys. Rep. 27, 1001 (2001)]}. The Er-values are found to significantly exceed those given by the standard neoclassical theory, based on thin-orbit assumption, when the plasma current is sufficiently low and the pressure gradient is sufficiently high. Strong Er-structures are found to form in the same low plasma-current range where enhanced confinement is reported in the FT-2 tokamak. In the simulations, the physics behind the strong increase in the field values is intimately related to the poloidal Mach-number, together with the wide ion orbits.

AB - The magnitude of the radial electric field (Er), resulting from nonambipolar fluxes of neoclassical origin, is evaluated using Monte Carlo guiding-center simulations for a low-current plasma corresponding to the FT-2 tokamak {Fisichiskii Tokamak-2, Ioffe Institute, St. Petersburg [S. I. Lashkul, V. N. Budnikov, E. O. Vekshina et al., Plasma Phys. Rep. 27, 1001 (2001)]}. The Er-values are found to significantly exceed those given by the standard neoclassical theory, based on thin-orbit assumption, when the plasma current is sufficiently low and the pressure gradient is sufficiently high. Strong Er-structures are found to form in the same low plasma-current range where enhanced confinement is reported in the FT-2 tokamak. In the simulations, the physics behind the strong increase in the field values is intimately related to the poloidal Mach-number, together with the wide ion orbits.

KW - plasma transport processes

KW - Tokamak devices

KW - ToKamak

KW - plasma toroidal confinement

KW - plasma flow

KW - plasma simulation

KW - Monte Carlo methods

KW - plasma pressure

KW - Mach number

KW - fusion energy

KW - fusion reactors

U2 - 10.1063/1.2749501

DO - 10.1063/1.2749501

M3 - Article

SN - 1070-664X

VL - 14

JO - Physics of Plasmas

JF - Physics of Plasmas

IS - 7

M1 - 072510

ER -

Guiding-center simulations of nonlocal and negative inertia effects on rotation in a tokamak

Abstract

UN SDGs

Keywords

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