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research article

Integrated modelling of H-mode pedestal and confinement in JET-ILW

Saarelma, S.
•
Challis, C. D.
•
Garzotti, L.
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January 1, 2018
Plasma Physics And Controlled Fusion

A pedestal prediction model Europed is built on the existing EPED1 model by coupling it with core transport simulation using a Bohm-gyroBohm transport model to self-consistently predict JET-ILW power scan for hybrid plasmas that display weaker power degradation than the IPB98 (y, 2) scaling of the energy confinement time. The weak power degradation is reproduced in the coupled core-pedestal simulation. The coupled core-pedestal model is further tested for a 3.0 MA plasma with the highest stored energy achieved in JET-ILW so far, giving a prediction of the stored plasma energy within the error margins of the measured experimental value. A pedestal density prediction model based on the neutral penetration is tested on a JET-ILW database giving a prediction with an average error of 17% from the experimental data when a parameter taking into account the fuelling rate is added into the model. However the model fails to reproduce the power dependence of the pedestal density implying missing transport physics in the model. The future JET-ILW deuterium campaign with increased heating power is predicted to reach plasma energy of 11 MJ, which would correspond to 11-13 MW of fusion power in equivalent deuterium-tritium plasma but with isotope effects on pedestal stability and core transport ignored.

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Type
research article
DOI
10.1088/1361-6587/aa8d45
Web of Science ID

WOS:000428752600004

Author(s)
Saarelma, S.
Challis, C. D.
Garzotti, L.
Frassinetti, L.
Maggi, C. F.
Romanelli, M.
Stokes, C.
Abduallev, S.
Abhangi, M.
Abreu, P.
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Date Issued

2018-01-01

Published in
Plasma Physics And Controlled Fusion
Volume

60

Issue

1

Article Number

014042

Subjects

Physics, Fluids & Plasmas

•

Physics

•

pedestal

•

prediction

•

integration

•

neutral penetration

•

heat

Note

44th Conference of the European-Physical-Society (EPS) on Plasma Physics, Jun 26-30, 2017, Belfast, ENGLAND

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
SPC  
Available on Infoscience
September 20, 2019
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/161351
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