Radial electric field shear due to neoclassical effects in transport barriers

T. Kiviniemi; T. Kurki-Suonio; S. Sipilä; Jukka Heikkinen; A. Peeters

doi:10.1023/A:1012846201220

Radial electric field shear due to neoclassical effects in transport barriers

T. Kiviniemi, T. Kurki-Suonio, S. Sipilä, Jukka Heikkinen, A. Peeters

VTT Technical Research Centre of Finland

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

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Abstract

The E_r×B flow shear is simulated with a fully kinetic five-dimensional neoclassical Monte Carlo simulation for JET and ASDEX Upgrade plasma edge conditions. Here, Er is the radial electric field and B is the magnetic field. It is shown that high enough shear for turbulence suppression can be driven at the Low (L) to High (H) transition conditions by pure neoclassical effects including ion orbit losses. Simulations indicate higher threshold shear for ASDEX Upgrade than for JET. Shear values are compared to different models and experimental results of critical shear, and isotope effect on shear is discussed. Formation of an internal transport barrier in FT-2 in the presence of lower hybrid waves is also studied.

Original language	English
Pages (from-to)	1053-1064
Journal	Czechoslovak Journal of Physics
Volume	51
Issue number	10
DOIs	https://doi.org/10.1023/A:1012846201220
Publication status	Published - 2001
MoE publication type	A1 Journal article-refereed

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title = "Radial electric field shear due to neoclassical effects in transport barriers",

abstract = "The Er×B flow shear is simulated with a fully kinetic five-dimensional neoclassical Monte Carlo simulation for JET and ASDEX Upgrade plasma edge conditions. Here, Er is the radial electric field and B is the magnetic field. It is shown that high enough shear for turbulence suppression can be driven at the Low (L) to High (H) transition conditions by pure neoclassical effects including ion orbit losses. Simulations indicate higher threshold shear for ASDEX Upgrade than for JET. Shear values are compared to different models and experimental results of critical shear, and isotope effect on shear is discussed. Formation of an internal transport barrier in FT-2 in the presence of lower hybrid waves is also studied.",

author = "T. Kiviniemi and T. Kurki-Suonio and S. Sipil{\"a} and Jukka Heikkinen and A. Peeters",

year = "2001",

doi = "10.1023/A:1012846201220",

language = "English",

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T1 - Radial electric field shear due to neoclassical effects in transport barriers

AU - Kiviniemi, T.

AU - Kurki-Suonio, T.

AU - Sipilä, S.

AU - Heikkinen, Jukka

AU - Peeters, A.

PY - 2001

Y1 - 2001

N2 - The Er×B flow shear is simulated with a fully kinetic five-dimensional neoclassical Monte Carlo simulation for JET and ASDEX Upgrade plasma edge conditions. Here, Er is the radial electric field and B is the magnetic field. It is shown that high enough shear for turbulence suppression can be driven at the Low (L) to High (H) transition conditions by pure neoclassical effects including ion orbit losses. Simulations indicate higher threshold shear for ASDEX Upgrade than for JET. Shear values are compared to different models and experimental results of critical shear, and isotope effect on shear is discussed. Formation of an internal transport barrier in FT-2 in the presence of lower hybrid waves is also studied.

AB - The Er×B flow shear is simulated with a fully kinetic five-dimensional neoclassical Monte Carlo simulation for JET and ASDEX Upgrade plasma edge conditions. Here, Er is the radial electric field and B is the magnetic field. It is shown that high enough shear for turbulence suppression can be driven at the Low (L) to High (H) transition conditions by pure neoclassical effects including ion orbit losses. Simulations indicate higher threshold shear for ASDEX Upgrade than for JET. Shear values are compared to different models and experimental results of critical shear, and isotope effect on shear is discussed. Formation of an internal transport barrier in FT-2 in the presence of lower hybrid waves is also studied.

U2 - 10.1023/A:1012846201220

DO - 10.1023/A:1012846201220

M3 - Article

SN - 0011-4626

VL - 51

SP - 1053

EP - 1064

JO - Czechoslovak Journal of Physics

JF - Czechoslovak Journal of Physics

IS - 10

ER -

Radial electric field shear due to neoclassical effects in transport barriers

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