Non-linear magnetohydrodynamic simulations of pellet triggered edgelocalized modes in JET

JOREK team; JET Contributors; S. Futatani; S. Pamela; L. Garzotti; G. T.A. Huijsmans; M. Hoelzl; D. Frigione; M. Lennholm

doi:10.1088/1741-4326/ab56c7

Non-linear magnetohydrodynamic simulations of pellet triggered edgelocalized modes in JET

JOREK team, JET Contributors, S. Futatani (Corresponding author), S. Pamela, L. Garzotti, G. T.A. Huijsmans, M. Hoelzl, D. Frigione, M. Lennholm

Science and Technology of Nuclear Fusion

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

13 Citations (Scopus)

Abstract

Non-linear magnetohydrodynamic simulations of pellet-triggered edge-localized modes (ELMs) in JET plasma have been carried out with the JOREK code. The pellet particle fuelling efficiency and the power flux at the divertor target during the pellet-triggered ELM have been studied. The pellet injection in unstable plasma delivers the particle fuelling but the pellet fuelling rate is smaller than the rate of particle loss during the pellet triggered ELM. The JOREK simulations estimate the power flux at the divertor target and found good agreement with the experimental observation. The energy deposition of the pellet triggered ELM shows a toroidally asymmetric profile. However, and due to this toroidal asymmetry, this effect cannot be captured by the existing layout of the divertor infra-red (IR) cameras available in JET. This work highlights the benefit of having a larger number of IR cameras to analyse the heat flux for the experiments which are assumed to be toroidally asymmetric, such as the pellet and/or gas injection experiments.

Original language	English
Article number	026003
Number of pages	17
Journal	Nuclear Fusion
Volume	60
Issue number	2
DOIs	https://doi.org/10.1088/1741-4326/ab56c7
Publication status	Published - 2020

Funding

The work of S.F. is supported by a Ramón y Cajal grant from the Spanish Ministry of Economy and Competitiveness (RYC-2014-15206). 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 and 2019-2020 under Grant Agreement No. 633053. The views and opinions expressed herein do not necessarily reflect either those of the European Commission. The author thankfully acknowledges the computer resources of PRACE (Partnership for Advanced Computing in Europe) and RES (Spanish Supercomputing Network) at MareNostrum and the technical support provided by Barcelona Supercomputing Center, and the support from Marconi-Fusion, the High Performance Computer at the CINECA headquarters in Bologna (Italy) for its provision of supercomputer resources.

Funders	Funder number
European Union's Horizon 2020 - Research and Innovation Framework Programme
European Union's Horizon 2020 - Research and Innovation Framework Programme	633053
Ministerio de Economía y Competitividad	RYC-2014-15206
Barcelona Supercomputing Center

Keywords

ELM
JET
JOREK
MHD
Pellet
Simulations

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10.1088/1741-4326/ab56c7

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title = "Non-linear magnetohydrodynamic simulations of pellet triggered edgelocalized modes in JET",

abstract = "Non-linear magnetohydrodynamic simulations of pellet-triggered edge-localized modes (ELMs) in JET plasma have been carried out with the JOREK code. The pellet particle fuelling efficiency and the power flux at the divertor target during the pellet-triggered ELM have been studied. The pellet injection in unstable plasma delivers the particle fuelling but the pellet fuelling rate is smaller than the rate of particle loss during the pellet triggered ELM. The JOREK simulations estimate the power flux at the divertor target and found good agreement with the experimental observation. The energy deposition of the pellet triggered ELM shows a toroidally asymmetric profile. However, and due to this toroidal asymmetry, this effect cannot be captured by the existing layout of the divertor infra-red (IR) cameras available in JET. This work highlights the benefit of having a larger number of IR cameras to analyse the heat flux for the experiments which are assumed to be toroidally asymmetric, such as the pellet and/or gas injection experiments.",

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doi = "10.1088/1741-4326/ab56c7",

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AU - JOREK team

AU - JET Contributors

AU - Futatani, S.

AU - Pamela, S.

AU - Garzotti, L.

AU - Huijsmans, G. T.A.

AU - Hoelzl, M.

AU - Frigione, D.

AU - Lennholm, M.

PY - 2020

Y1 - 2020

N2 - Non-linear magnetohydrodynamic simulations of pellet-triggered edge-localized modes (ELMs) in JET plasma have been carried out with the JOREK code. The pellet particle fuelling efficiency and the power flux at the divertor target during the pellet-triggered ELM have been studied. The pellet injection in unstable plasma delivers the particle fuelling but the pellet fuelling rate is smaller than the rate of particle loss during the pellet triggered ELM. The JOREK simulations estimate the power flux at the divertor target and found good agreement with the experimental observation. The energy deposition of the pellet triggered ELM shows a toroidally asymmetric profile. However, and due to this toroidal asymmetry, this effect cannot be captured by the existing layout of the divertor infra-red (IR) cameras available in JET. This work highlights the benefit of having a larger number of IR cameras to analyse the heat flux for the experiments which are assumed to be toroidally asymmetric, such as the pellet and/or gas injection experiments.

AB - Non-linear magnetohydrodynamic simulations of pellet-triggered edge-localized modes (ELMs) in JET plasma have been carried out with the JOREK code. The pellet particle fuelling efficiency and the power flux at the divertor target during the pellet-triggered ELM have been studied. The pellet injection in unstable plasma delivers the particle fuelling but the pellet fuelling rate is smaller than the rate of particle loss during the pellet triggered ELM. The JOREK simulations estimate the power flux at the divertor target and found good agreement with the experimental observation. The energy deposition of the pellet triggered ELM shows a toroidally asymmetric profile. However, and due to this toroidal asymmetry, this effect cannot be captured by the existing layout of the divertor infra-red (IR) cameras available in JET. This work highlights the benefit of having a larger number of IR cameras to analyse the heat flux for the experiments which are assumed to be toroidally asymmetric, such as the pellet and/or gas injection experiments.

KW - ELM

KW - JET

KW - JOREK

KW - MHD

KW - Pellet

KW - Simulations

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VL - 60

JO - Nuclear Fusion

JF - Nuclear Fusion

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M1 - 026003

ER -

Non-linear magnetohydrodynamic simulations of pellet triggered edgelocalized modes in JET

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