Equilibrium reconstruction at JET using Stokes model for polarimetry

Blaise Faugeras; Francesco Orsitto; Leena Aho-Mantila; Markus Airila; Antti Hakola; Aaro Järvinen; Juuso Karhunen; Seppo Koivuranta; Aki Lahtinen; Jari Likonen; Antti Salmi; Paula Sirén; Tuomas Tala; JET Contributors

doi:10.1088/1741-4326/aad751

Equilibrium reconstruction at JET using Stokes model for polarimetry

Blaise Faugeras^*
, Francesco Orsitto
, Leena Aho-Mantila
, Markus Airila
, Antti Hakola
, Aaro Järvinen
, Juuso Karhunen
, Seppo Koivuranta
, Aki Lahtinen
, Jari Likonen
, Antti Salmi
, Paula Sirén
, Tuomas Tala
, JET Contributors

^*Corresponding author for this work

Côte d'Azur University
University of Naples Federico II
National Laboratory of Frascati
Culham Science Centre
Forschungszentrum Jülich GmbH (FZJ)
Institute for Plasma Research
Universidade de Lisboa
Queen's University Belfast
University of Helsinki
Commissariat a l'Energie Atomique et aux Energies Alternatives (CEA)
National Institutes for Quantum Science and Technology (QST)
National University of Distance Education
National Research Council (CNR)
ITER Organization
Petersburg Nuclear Physics Institute
Parthenope University of Naples
National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA)
Troitsk Institute for Innovation and Fusion Research
Uppsala University
National Institute for Cryogenics and Isotopic Technology
Max-Planck-Institut für Plasmaphysik (IPP)
University of Catania
Aalto University
Seoul National University
Institute of Plasma Physics (ASIPP CAS)
Chalmers University of Technology

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

27 Citations (Scopus)

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
Publication status	Published - 30 Aug 2018
MoE publication type	A1 Journal article-refereed

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.

Keywords

equilibrium reconstruction
JET
polarimetry
Stokes model

Access to Document

10.1088/1741-4326/aad751

Cite this

@article{94b1c49d806747cda581746fbb6fbfa7,

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

author = "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 Leena Aho-Mantila and N. Aiba and Markus 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 Antti Hakola and Aaro J{\"a}rvinen and Juuso Karhunen and H.T. Kim and H.S. Kim and Seppo Koivuranta and Aki Lahtinen and Jari Likonen and Y. Liu and T. Makkonen and H. Nordman and Antti Salmi and M.I.K. Santala and Paula Sir{\'e}n and Tuomas Tala and \{JET Contributors\}",

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",

publisher = "Institute of Physics IOP",

number = "10",

}

TY - JOUR

T1 - Equilibrium reconstruction at JET using Stokes model for polarimetry

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, Leena

AU - Aiba, N.

AU - Airila, Markus

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 - Hakola, Antti

AU - Järvinen, Aaro

AU - Karhunen, Juuso

AU - Kim, H.T.

AU - Kim, H.S.

AU - Koivuranta, Seppo

AU - Lahtinen, Aki

AU - Likonen, Jari

AU - Liu, Y.

AU - Makkonen, T.

AU - Nordman, H.

AU - Salmi, Antti

AU - Santala, M.I.K.

AU - Sirén, Paula

AU - Tala, Tuomas

AU - JET Contributors

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 - equilibrium reconstruction

KW - JET

KW - polarimetry

KW - Stokes model

UR - https://www.scopus.com/pages/publications/85053426621

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

Funding

Keywords

Access to Document

Other files and links

Fingerprint

Cite this