Dependence on plasma shape and plasma fueling for small edge-localized mode regimes in TCV and ASDEX Upgrade

B. Labit; T. Eich; G. F. Harrer; E. Wolfrum; M. Bernert; M. G. Dunne; L. Frassinetti; P. Hennequin; R. Maurizio; A. Merle; H. Meyer; S. Saarelma; U. Sheikh; J. Adamek; M. Agostini; D. Aguiam; R. Akers; R. Albanese; C. Albert; E. Alessi; R. Ambrosino; Y. Andr be; C. Angioni; G. Apruzzese; M. Aradi; H. Arnichand; F. Auriemma; G. Avdeeva; J. M. Ayllon-Guerola; F. Bagnato; V. K. Bandaru; M. Barnes; L. Barrera-Orte; P. Bettini; R. Bilato; O. Biletskyi; P. Bilkova; W. Bin; P. Blanchard; T. Blanken; V. Bobkov; A. Bock; D. Boeyaert; K. Bogar; O. Bogar; Antti Hakola; Aapeli Lahtinen; Jari Likonen; Antti Salmi; Tuomas Tala; JET EUROfusion Consortium

doi:10.1088/1741-4326/ab2211

Dependence on plasma shape and plasma fueling for small edge-localized mode regimes in TCV and ASDEX Upgrade

B. Labit^*
, T. Eich
, G. F. Harrer
, E. Wolfrum
, M. Bernert
, M. G. Dunne
, L. Frassinetti
, P. Hennequin
, R. Maurizio
, A. Merle
, H. Meyer
, S. Saarelma
, U. Sheikh
, J. Adamek
, M. Agostini
, D. Aguiam
, R. Akers
, R. Albanese
, C. Albert
, E. Alessi

R. Ambrosino, Y. Andr be, C. Angioni, G. Apruzzese, M. Aradi, H. Arnichand, F. Auriemma, G. Avdeeva, J. M. Ayllon-Guerola, F. Bagnato, V. K. Bandaru, M. Barnes, L. Barrera-Orte, P. Bettini, R. Bilato, O. Biletskyi, P. Bilkova, W. Bin, P. Blanchard, T. Blanken, V. Bobkov, A. Bock, D. Boeyaert, K. Bogar, O. Bogar, Antti Hakola, Aapeli Lahtinen, Jari Likonen, Antti Salmi, Tuomas Tala, JET EUROfusion Consortium

^*Corresponding author for this work

Culham Science Centre
Ecole Polytechnique Fédérale de Lausanne (EPFL)
Max-Planck-Institut für Plasmaphysik (IPP)
Vienna University of Technology (TU Wien)
KTH Royal Institute of Technology
University of Paris-Saclay
Czech Academy of Sciences
National Research Council (CNR)
Universidade de Lisboa
University of Naples Federico II
Graz University of Technology
Parthenope University of Naples
National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA)
Technical University of Denmark (DTU)
University of Seville
University of Oxford
European Consortium for the Development of Fusion Energy (EUROfusion)
Kharkiv Institute of Physics and Technology
Eindhoven University of Technology (TU/e)
Forschungszentrum Jülich GmbH (FZJ)
University of Helsinki

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

55 Citations (Scopus)

Abstract

Within the EUROfusion MST1 work package, a series of experiments has been conducted on AUG and TCV devices to disentangle the role of plasma fueling and plasma shape for the onset of small ELM regimes. On both devices, small ELM regimes with high confinement are achieved if and only if two conditions are fulfilled at the same time. Firstly, the plasma density at the separatrix must be large enough (n_e,sep/n_G ∼ 0.3), leading to a pressure profile flattening at the separatrix, which stabilizes type-I ELMs. Secondly, the magnetic configuration has to be close to a double null (DN), leading to a reduction of the magnetic shear in the extreme vicinity of the separatrix. As a consequence, its stabilizing effect on ballooning modes is weakened.

Original language	English
Article number	086020
Number of pages	13
Journal	Nuclear Fusion
Volume	59
Issue number	8
DOIs	https://doi.org/10.1088/1741-4326/ab2211
Publication status	Published - 26 Jun 2019
MoE publication type	A1 Journal article-refereed

Funding

This work has been carried out within the framework of the EUROfusion Consortium and received funding from the Euratom research and training programme 2014–2018 and 2019–2020 under Grant Agreeement No. 633053. G.F. Harrer is a fellow of the Friedrich Schiedel Foundation for Energy Technology. This work was supported in part by the Swiss National Science Foundation.

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

ballooning modes
grassy ELMs
H-mode
plasma triangularity
separatrix density
type-II ELMs

Access to Document

10.1088/1741-4326/ab2211

Cite this

Labit, B., Eich, T., Harrer, G. F., Wolfrum, E., Bernert, M., Dunne, M. G., Frassinetti, L., Hennequin, P., Maurizio, R., Merle, A., Meyer, H., Saarelma, S., Sheikh, U., Adamek, J., Agostini, M., Aguiam, D., Akers, R., Albanese, R., Albert, C., ... JET EUROfusion Consortium (2019). Dependence on plasma shape and plasma fueling for small edge-localized mode regimes in TCV and ASDEX Upgrade. Nuclear Fusion, 59(8), Article 086020. https://doi.org/10.1088/1741-4326/ab2211

@article{ed64e1bf8bb048b1a010b90381ac8624,

title = "Dependence on plasma shape and plasma fueling for small edge-localized mode regimes in TCV and ASDEX Upgrade",

abstract = "Within the EUROfusion MST1 work package, a series of experiments has been conducted on AUG and TCV devices to disentangle the role of plasma fueling and plasma shape for the onset of small ELM regimes. On both devices, small ELM regimes with high confinement are achieved if and only if two conditions are fulfilled at the same time. Firstly, the plasma density at the separatrix must be large enough (ne,sep/nG ∼ 0.3), leading to a pressure profile flattening at the separatrix, which stabilizes type-I ELMs. Secondly, the magnetic configuration has to be close to a double null (DN), leading to a reduction of the magnetic shear in the extreme vicinity of the separatrix. As a consequence, its stabilizing effect on ballooning modes is weakened.",

keywords = "ballooning modes, grassy ELMs, H-mode, plasma triangularity, separatrix density, type-II ELMs",

author = "B. Labit and T. Eich and Harrer, \{G. F.\} and E. Wolfrum and M. Bernert and Dunne, \{M. G.\} and L. Frassinetti and P. Hennequin and R. Maurizio and A. Merle and H. Meyer and S. Saarelma and U. Sheikh and J. Adamek and M. Agostini and D. Aguiam and R. Akers and R. Albanese and C. Albert and E. Alessi and R. Ambrosino and \{Andr be\}, Y. and C. Angioni and G. Apruzzese and M. Aradi and H. Arnichand and F. Auriemma and G. Avdeeva and Ayllon-Guerola, \{J. M.\} and F. Bagnato and Bandaru, \{V. K.\} and M. Barnes and L. Barrera-Orte and P. Bettini and R. Bilato and O. Biletskyi and P. Bilkova and W. Bin and P. Blanchard and T. Blanken and V. Bobkov and A. Bock and D. Boeyaert and K. Bogar and O. Bogar and Antti Hakola and Aapeli Lahtinen and Jari Likonen and Antti Salmi and Tuomas Tala and \{JET EUROfusion Consortium\}",

year = "2019",

month = jun,

day = "26",

doi = "10.1088/1741-4326/ab2211",

language = "English",

volume = "59",

journal = "Nuclear Fusion",

issn = "0029-5515",

publisher = "Institute of Physics IOP",

number = "8",

}

Labit, B, Eich, T, Harrer, GF, Wolfrum, E, Bernert, M, Dunne, MG, Frassinetti, L, Hennequin, P, Maurizio, R, Merle, A, Meyer, H, Saarelma, S, Sheikh, U, Adamek, J, Agostini, M, Aguiam, D, Akers, R, Albanese, R, Albert, C, Alessi, E, Ambrosino, R, Andr be, Y, Angioni, C, Apruzzese, G, Aradi, M, Arnichand, H, Auriemma, F, Avdeeva, G, Ayllon-Guerola, JM, Bagnato, F, Bandaru, VK, Barnes, M, Barrera-Orte, L, Bettini, P, Bilato, R, Biletskyi, O, Bilkova, P, Bin, W, Blanchard, P, Blanken, T, Bobkov, V, Bock, A, Boeyaert, D, Bogar, K, Bogar, O, Hakola, A, Lahtinen, A, Likonen, J , Salmi, A , Tala, T & JET EUROfusion Consortium 2019, 'Dependence on plasma shape and plasma fueling for small edge-localized mode regimes in TCV and ASDEX Upgrade', Nuclear Fusion, vol. 59, no. 8, 086020. https://doi.org/10.1088/1741-4326/ab2211

TY - JOUR

T1 - Dependence on plasma shape and plasma fueling for small edge-localized mode regimes in TCV and ASDEX Upgrade

AU - Labit, B.

AU - Eich, T.

AU - Harrer, G. F.

AU - Wolfrum, E.

AU - Bernert, M.

AU - Dunne, M. G.

AU - Frassinetti, L.

AU - Hennequin, P.

AU - Maurizio, R.

AU - Merle, A.

AU - Meyer, H.

AU - Saarelma, S.

AU - Sheikh, U.

AU - Adamek, J.

AU - Agostini, M.

AU - Aguiam, D.

AU - Akers, R.

AU - Albanese, R.

AU - Albert, C.

AU - Alessi, E.

AU - Ambrosino, R.

AU - Andr be, Y.

AU - Angioni, C.

AU - Apruzzese, G.

AU - Aradi, M.

AU - Arnichand, H.

AU - Auriemma, F.

AU - Avdeeva, G.

AU - Ayllon-Guerola, J. M.

AU - Bagnato, F.

AU - Bandaru, V. K.

AU - Barnes, M.

AU - Barrera-Orte, L.

AU - Bettini, P.

AU - Bilato, R.

AU - Biletskyi, O.

AU - Bilkova, P.

AU - Bin, W.

AU - Blanchard, P.

AU - Blanken, T.

AU - Bobkov, V.

AU - Bock, A.

AU - Boeyaert, D.

AU - Bogar, K.

AU - Bogar, O.

AU - Hakola, Antti

AU - Lahtinen, Aapeli

AU - Likonen, Jari

AU - Salmi, Antti

AU - Tala, Tuomas

AU - JET EUROfusion Consortium

PY - 2019/6/26

Y1 - 2019/6/26

N2 - Within the EUROfusion MST1 work package, a series of experiments has been conducted on AUG and TCV devices to disentangle the role of plasma fueling and plasma shape for the onset of small ELM regimes. On both devices, small ELM regimes with high confinement are achieved if and only if two conditions are fulfilled at the same time. Firstly, the plasma density at the separatrix must be large enough (ne,sep/nG ∼ 0.3), leading to a pressure profile flattening at the separatrix, which stabilizes type-I ELMs. Secondly, the magnetic configuration has to be close to a double null (DN), leading to a reduction of the magnetic shear in the extreme vicinity of the separatrix. As a consequence, its stabilizing effect on ballooning modes is weakened.

AB - Within the EUROfusion MST1 work package, a series of experiments has been conducted on AUG and TCV devices to disentangle the role of plasma fueling and plasma shape for the onset of small ELM regimes. On both devices, small ELM regimes with high confinement are achieved if and only if two conditions are fulfilled at the same time. Firstly, the plasma density at the separatrix must be large enough (ne,sep/nG ∼ 0.3), leading to a pressure profile flattening at the separatrix, which stabilizes type-I ELMs. Secondly, the magnetic configuration has to be close to a double null (DN), leading to a reduction of the magnetic shear in the extreme vicinity of the separatrix. As a consequence, its stabilizing effect on ballooning modes is weakened.

KW - ballooning modes

KW - grassy ELMs

KW - H-mode

KW - plasma triangularity

KW - separatrix density

KW - type-II ELMs

UR - https://www.scopus.com/pages/publications/85070909412

U2 - 10.1088/1741-4326/ab2211

DO - 10.1088/1741-4326/ab2211

M3 - Article

AN - SCOPUS:85070909412

SN - 0029-5515

VL - 59

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 8

M1 - 086020

ER -

Dependence on plasma shape and plasma fueling for small edge-localized mode regimes in TCV and ASDEX Upgrade

Abstract

Funding

UN SDGs

Keywords

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