Impact of<i> E </i>× <i>B </i> flow shear stabilization on particle confinement and density peaking at JET

W BUANGAM; J GARCIA; T ONJUN; JET Contributors

doi:10.1088/2058-6272/ab7b0e

Plasma Science and Technology > 2020 > 22(6): 65101-065101. > DOI: 10.1088/2058-6272/ab7b0e

W BUANGAM, J GARCIA, T ONJUN, JET Contributors. Impact of E × B flow shear stabilization on particle confinement and density peaking at JET[J]. Plasma Science and Technology, 2020, 22(6): 65101-065101. DOI: 10.1088/2058-6272/ab7b0e

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Impact of E × B flow shear stabilization on particle confinement and density peaking at JET

¹ School of Manufacturing Systems and Mechanical Engineering, Sirindhorn International Institute of Technology, Thammasat University, Pathumthani 12120, Thailand
² CEA, IRFM, Saint-Paul-lez-Durance F-13108, France
³ Thailand Institute of Nuclear Technology, Chatuchak 10900, Thailand

Funds: This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014–2018 under grant agreement No. 633053.

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Received Date: September 16, 2019
Revised Date: February 26, 2020
Accepted Date: February 27, 2020

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Abstract

The impact of the E × B flow shear stabilization on particle transport and density peaking at JET is analyzed in the framework of integrated modelling with the CRONOS code. For that purpose, plasmas from a power scan which show a significant increasing of density peaking with the injected neutral beam injection power have been used as a modeling basis. By means of simulations with the quasilinear model GLF23 for the heat and particle transport, a strong link between the particle confinement and E × B flow shear stabilization is found. This is particularly important close to the pedestal region where the particle pinch direction becomes strongly inward for high E × B flow shear values. Such impact introduces some non-negligible deviation from the well-known collisonality dependence of the density peaking, whose general trend has been also obtained in the framework of this modelling by performing pedestal density scans.
- particle confinement,
- density peaking,
- flow shear,
- transport

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