Equilibrium reconstruction at JET using Stokes model for polarimetry

JET Contributors

doi:10.1088/1741-4326/aad751

Equilibrium reconstruction at JET using Stokes model for polarimetry

JET Contributors

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

25 Scopus citations

Abstract

This paper presents the first application to real JET data of the new equilibrium code NICE which enables the consistent resolution of the inverse equilibrium reconstruction problem in the framework of non-linear free-boundary equilibrium coupled to the Stokes model equation for polarimetry. The conducted numerical experiments enable first of all to validate NICE by comparing it to the well-established EFIT code on 4 selected high performance shots. Secondly the results indicate that the fit to polarimetry measurements clearly benefits from the use of Stokes vector measurements compared to the classical case of Faraday measurements, and that the reconstructed p′ and ff ′ profiles are better constrained with smaller error bars and are closer to the profiles reconstructed by EFTM, the EFIT JET code using internal MSE constraints.

Original language	English
Article number	106032
Journal	Nuclear Fusion
Volume	58
Issue number	10
DOIs	https://doi.org/10.1088/1741-4326/aad751
State	Published - Aug 30 2018

Funding

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. The views and opinions expressed herein do not necessarily reflect those of the European Commission.

Funders	Funder number
Euratom research and training programme 2014–2018
Horizon 2020 Framework Programme	633053
Horizon 2020 Framework Programme

Keywords

JET
Stokes model
equilibrium reconstruction
polarimetry

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10.1088/1741-4326/aad751

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@article{cf4b6e8b736842158d49ca9ba4e2e1de,

title = "Equilibrium reconstruction at JET using Stokes model for polarimetry",

abstract = "This paper presents the first application to real JET data of the new equilibrium code NICE which enables the consistent resolution of the inverse equilibrium reconstruction problem in the framework of non-linear free-boundary equilibrium coupled to the Stokes model equation for polarimetry. The conducted numerical experiments enable first of all to validate NICE by comparing it to the well-established EFIT code on 4 selected high performance shots. Secondly the results indicate that the fit to polarimetry measurements clearly benefits from the use of Stokes vector measurements compared to the classical case of Faraday measurements, and that the reconstructed p′ and ff ′ profiles are better constrained with smaller error bars and are closer to the profiles reconstructed by EFTM, the EFIT JET code using internal MSE constraints.",

keywords = "JET, Stokes model, equilibrium reconstruction, polarimetry",

author = "{JET Contributors} and Blaise Faugeras and Francesco Orsitto and X. Litaudon and S. Abduallev and M. Abhangi and P. Abreu and M. Afzal and Aggarwal, {K. M.} and T. Ahlgren and Ahn, {J. H.} and L. Aho-Mantila and N. Aiba and M. Airila and R. Albanese and V. Aldred and D. Alegre and E. Alessi and P. Aleynikov and A. Alfier and A. Alkseev and M. Allinson and B. Alper and E. Alves and G. Ambrosino and R. Ambrosino and L. Amicucci and V. Amosov and Sund{\'e}n, {E. Andersson} and M. Angelone and M. Anghel and C. Angioni and L. Appel and C. Appelbee and P. Arena and M. Ariola and H. Arnichand and S. Arshad and A. Ash and N. Ashikawa and V. Aslanyan and L. Baylor and T. Biewer and R. Goulding and R. Grove and M. Kaufman and C. Klepper and B. Lomanowski and S. Meitner and J. Risner and Wilson, {H. R.}",

note = "Publisher Copyright: {\textcopyright} EURATOM 2018.",

year = "2018",

month = aug,

day = "30",

doi = "10.1088/1741-4326/aad751",

language = "English",

volume = "58",

journal = "Nuclear Fusion",

issn = "0029-5515",

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TY - JOUR

T1 - Equilibrium reconstruction at JET using Stokes model for polarimetry

AU - JET Contributors

AU - Faugeras, Blaise

AU - Orsitto, Francesco

AU - Litaudon, X.

AU - Abduallev, S.

AU - Abhangi, M.

AU - Abreu, P.

AU - Afzal, M.

AU - Aggarwal, K. M.

AU - Ahlgren, T.

AU - Ahn, J. H.

AU - Aho-Mantila, L.

AU - Aiba, N.

AU - Airila, M.

AU - Albanese, R.

AU - Aldred, V.

AU - Alegre, D.

AU - Alessi, E.

AU - Aleynikov, P.

AU - Alfier, A.

AU - Alkseev, A.

AU - Allinson, M.

AU - Alper, B.

AU - Alves, E.

AU - Ambrosino, G.

AU - Ambrosino, R.

AU - Amicucci, L.

AU - Amosov, V.

AU - Sundén, E. Andersson

AU - Angelone, M.

AU - Anghel, M.

AU - Angioni, C.

AU - Appel, L.

AU - Appelbee, C.

AU - Arena, P.

AU - Ariola, M.

AU - Arnichand, H.

AU - Arshad, S.

AU - Ash, A.

AU - Ashikawa, N.

AU - Aslanyan, V.

AU - Baylor, L.

AU - Biewer, T.

AU - Goulding, R.

AU - Grove, R.

AU - Kaufman, M.

AU - Klepper, C.

AU - Lomanowski, B.

AU - Meitner, S.

AU - Risner, J.

AU - Wilson, H. R.

PY - 2018/8/30

Y1 - 2018/8/30

N2 - This paper presents the first application to real JET data of the new equilibrium code NICE which enables the consistent resolution of the inverse equilibrium reconstruction problem in the framework of non-linear free-boundary equilibrium coupled to the Stokes model equation for polarimetry. The conducted numerical experiments enable first of all to validate NICE by comparing it to the well-established EFIT code on 4 selected high performance shots. Secondly the results indicate that the fit to polarimetry measurements clearly benefits from the use of Stokes vector measurements compared to the classical case of Faraday measurements, and that the reconstructed p′ and ff ′ profiles are better constrained with smaller error bars and are closer to the profiles reconstructed by EFTM, the EFIT JET code using internal MSE constraints.

AB - This paper presents the first application to real JET data of the new equilibrium code NICE which enables the consistent resolution of the inverse equilibrium reconstruction problem in the framework of non-linear free-boundary equilibrium coupled to the Stokes model equation for polarimetry. The conducted numerical experiments enable first of all to validate NICE by comparing it to the well-established EFIT code on 4 selected high performance shots. Secondly the results indicate that the fit to polarimetry measurements clearly benefits from the use of Stokes vector measurements compared to the classical case of Faraday measurements, and that the reconstructed p′ and ff ′ profiles are better constrained with smaller error bars and are closer to the profiles reconstructed by EFTM, the EFIT JET code using internal MSE constraints.

KW - JET

KW - Stokes model

KW - equilibrium reconstruction

KW - polarimetry

UR - http://www.scopus.com/inward/record.url?scp=85053426621&partnerID=8YFLogxK

U2 - 10.1088/1741-4326/aad751

DO - 10.1088/1741-4326/aad751

M3 - Article

AN - SCOPUS:85053426621

SN - 0029-5515

VL - 58

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 10

M1 - 106032

ER -

Equilibrium reconstruction at JET using Stokes model for polarimetry

Abstract

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Keywords

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