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

S. Saarelma, C. D. Challis, L. Garzotti, L. Frassinetti, C. F. Maggi, M. Romanelli, C. Stokes

Research output: Contribution to journalArticle

  • 2 Citations

Abstract

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.

Original languageEnglish
Article number014042
JournalPlasma Physics and Controlled Fusion
Volume60
Issue number1
DOIs
StatePublished - 1 Jan 2018

Fingerprint

Plasmas
Deuterium
Degradation
Fueling
Tritium
Isotopes
Fusion reactions
Physics
Heating

Keywords

  • integration
  • neutral penetration
  • pedestal
  • prediction

ASJC Scopus subject areas

  • Nuclear Energy and Engineering
  • Condensed Matter Physics

Cite this

Saarelma, S., Challis, C. D., Garzotti, L., Frassinetti, L., Maggi, C. F., Romanelli, M., & Stokes, C. (2018). Integrated modelling of H-mode pedestal and confinement in JET-ILW. Plasma Physics and Controlled Fusion, 60(1), [014042]. DOI: 10.1088/1361-6587/aa8d45

Integrated modelling of H-mode pedestal and confinement in JET-ILW. / Saarelma, S.; Challis, C. D.; Garzotti, L.; Frassinetti, L.; Maggi, C. F.; Romanelli, M.; Stokes, C.

In: Plasma Physics and Controlled Fusion, Vol. 60, No. 1, 014042, 01.01.2018.

Research output: Contribution to journalArticle

Saarelma, S, Challis, CD, Garzotti, L, Frassinetti, L, Maggi, CF, Romanelli, M & Stokes, C 2018, 'Integrated modelling of H-mode pedestal and confinement in JET-ILW' Plasma Physics and Controlled Fusion, vol 60, no. 1, 014042. DOI: 10.1088/1361-6587/aa8d45
Saarelma S, Challis CD, Garzotti L, Frassinetti L, Maggi CF, Romanelli M et al. Integrated modelling of H-mode pedestal and confinement in JET-ILW. Plasma Physics and Controlled Fusion. 2018 Jan 1;60(1). 014042. Available from, DOI: 10.1088/1361-6587/aa8d45

Saarelma, S.; Challis, C. D.; Garzotti, L.; Frassinetti, L.; Maggi, C. F.; Romanelli, M.; Stokes, C. / Integrated modelling of H-mode pedestal and confinement in JET-ILW.

In: Plasma Physics and Controlled Fusion, Vol. 60, No. 1, 014042, 01.01.2018.

Research output: Contribution to journalArticle

@article{34039e158ed644efad5974f8263846e2,
title = "Integrated modelling of H-mode pedestal and confinement in JET-ILW",
abstract = "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.",
keywords = "integration, neutral penetration, pedestal, prediction",
author = "S. Saarelma and Challis, {C. D.} and L. Garzotti and L. Frassinetti and Maggi, {C. F.} and M. Romanelli and C. Stokes",
year = "2018",
month = "1",
doi = "10.1088/1361-6587/aa8d45",
volume = "60",
journal = "Plasma Physics and Controlled Fusion",
issn = "0741-3335",
publisher = "IOP Publishing",
number = "1",

}

TY - JOUR

T1 - Integrated modelling of H-mode pedestal and confinement in JET-ILW

AU - Saarelma,S.

AU - Challis,C. D.

AU - Garzotti,L.

AU - Frassinetti,L.

AU - Maggi,C. F.

AU - Romanelli,M.

AU - Stokes,C.

PY - 2018/1/1

Y1 - 2018/1/1

N2 - 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.

AB - 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.

KW - integration

KW - neutral penetration

KW - pedestal

KW - prediction

UR - http://www.scopus.com/inward/record.url?scp=85038413790&partnerID=8YFLogxK

U2 - 10.1088/1361-6587/aa8d45

DO - 10.1088/1361-6587/aa8d45

M3 - Article

VL - 60

JO - Plasma Physics and Controlled Fusion

T2 - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

SN - 0741-3335

IS - 1

M1 - 014042

ER -