The role of isotope mass and transport for H-mode access in tritium containing plasmas at JET with ITER-like wall

G. Birkenmeier; E. R. Solano; I. S. Carvalho; J. C. Hillesheim; E. Delabie; E. Lerche; D. Taylor; D. Gallart; M. J. Mantsinen; C. Silva; C. Angioni; F. Ryter; P. Carvalho; M. Fontana; E. Pawelec; S. A. Silburn; P. Sirén; S. Aleiferis; J. Bernardo; A. Boboc; D. Douai; P. Puglia; P. Jacquet; E. Litherland-Smith; I. Jepu; D. Kos; H. J. Sun; A. Shaw; D. King; B. Viola; R. Henriques; K. K. Kirov; M. Baruzzo; J. Garcia; A. Hakola; A. Huber; E. Joffrin; D. Keeling; A. Kappatou; M. Lennholm; P. Lomas; E. de la Luna; C. F. Maggi; J. Mailloux; M. Maslov; F. G. Rimini; N. Vianello; G. Verdoolaege; H. Weisen; M. Wischmeier; JET Contributors

doi:10.1088/1361-6587/acc423

The role of isotope mass and transport for H-mode access in tritium containing plasmas at JET with ITER-like wall

G. Birkenmeier^*
, E. R. Solano
, I. S. Carvalho
, J. C. Hillesheim
, E. Delabie
, E. Lerche
, D. Taylor
, D. Gallart
, M. J. Mantsinen
, C. Silva
, C. Angioni
, F. Ryter
, P. Carvalho
, M. Fontana
, E. Pawelec
, S. A. Silburn
, P. Sirén
, S. Aleiferis
, J. Bernardo
, A. Boboc

D. Douai, P. Puglia, P. Jacquet, E. Litherland-Smith, I. Jepu, D. Kos, H. J. Sun, A. Shaw, D. King, B. Viola, R. Henriques, K. K. Kirov, M. Baruzzo, J. Garcia, A. Hakola, A. Huber, E. Joffrin, D. Keeling, A. Kappatou, M. Lennholm, P. Lomas, E. de la Luna, C. F. Maggi, J. Mailloux, M. Maslov, F. G. Rimini, N. Vianello, G. Verdoolaege, H. Weisen, M. Wischmeier, JET Contributors

^*Corresponding author for this work

Max-Planck-Institut für Plasmaphysik (IPP)
Laboratorio Nacional de Fusión (LNF)
Universidade de Lisboa
Culham Science Centre
Oak Ridge National Laboratory (ORNL)
École Royale Militaire
Barcelona Supercomputing Center
University of Opole
Commissariat a l'Energie Atomique et aux Energies Alternatives (CEA)
National Research Council (CNR)
Ecole Polytechnique Fédérale de Lausanne (EPFL)

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

19 Citations (Scopus)

Abstract

The required heating power, P L H , to access the high confinement regime (H-mode) in tritium containing plasmas is investigated in JET with ITER-like wall at a toroidal magnetic field of B t = 1.8 T and a plasma current of I p = 1.7 MA. P L H , also referred to as the L-H power threshold, is determined in plasmas of pure tritium as well as mixtures of hydrogen with tritium (H-T) and mixtures of deuterium with tritium (D-T), and is compared to the L-H power threshold in plasmas of pure hydrogen and pure deuterium. It is found that, for otherwise constant parameters, P L H is not the same in plasmas with the same effective isotope mass, A e f f , when they differ in their isotope composition. Thus, A e f f is not sufficient to describe the isotope effect of P L H in a consistent manner for all considered isotopes and isotope mixtures. The electron temperature profiles measured at the L-H transition in the outer half of the radius are very similar for all isotopes and isotope mixtures, despite the fact that the L-H power threshold varies by a factor of about six. This finding, together with the observation of an offset linear relation between the L-H power threshold, P L H , and an effective heat diffusivity, χ e f f , indicates that the composition-dependent heat transport in the low confinement mode (L-mode) determines, how much power is needed to reach the necessary electron temperatures at the edge, and hence P L H .

Original language	English
Article number	054001
Number of pages	10
Journal	Plasma Physics and Controlled Fusion
Volume	65
Issue number	5
DOIs	https://doi.org/10.1088/1361-6587/acc423
Publication status	Published - May 2023
MoE publication type	A4 Article in a conference publication
Event	48th EPS Conference on Plasma Physics: Online - Virtual Duration: 27 Jun 2022 → 1 Jul 2022

Funding

This work has been carried out within the framework of the EUROfusion Consortium, funded by the European Union via the Euratom Research and Training Programme (Grant Agreement No. 101052200—EUROfusion). Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or the European Commission. Neither the European Union nor the European Commission can be held responsible for them. G Birkenmeier received funding from the Helmholtz Association under Grant No. VH-NG-1350

UN SDGs

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

SDG 7 Affordable and Clean Energy

Keywords

D-T plasma operation
isotope effects
isotope mixtures
L-H transition
transport
tritium plasmas

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10.1088/1361-6587/acc423Licence: CC BY

Cite this

Birkenmeier, G., Solano, E. R., Carvalho, I. S., Hillesheim, J. C., Delabie, E., Lerche, E., Taylor, D., Gallart, D., Mantsinen, M. J., Silva, C., Angioni, C., Ryter, F., Carvalho, P., Fontana, M., Pawelec, E., Silburn, S. A., Sirén, P., Aleiferis, S., Bernardo, J., ... JET Contributors (2023). The role of isotope mass and transport for H-mode access in tritium containing plasmas at JET with ITER-like wall. Plasma Physics and Controlled Fusion, 65(5), Article 054001. https://doi.org/10.1088/1361-6587/acc423

@article{1c4ed556dfd3487bade1ba3eb04cb27e,

title = "The role of isotope mass and transport for H-mode access in tritium containing plasmas at JET with ITER-like wall",

abstract = "The required heating power, P L H , to access the high confinement regime (H-mode) in tritium containing plasmas is investigated in JET with ITER-like wall at a toroidal magnetic field of B t = 1.8 T and a plasma current of I p = 1.7 MA. P L H , also referred to as the L-H power threshold, is determined in plasmas of pure tritium as well as mixtures of hydrogen with tritium (H-T) and mixtures of deuterium with tritium (D-T), and is compared to the L-H power threshold in plasmas of pure hydrogen and pure deuterium. It is found that, for otherwise constant parameters, P L H is not the same in plasmas with the same effective isotope mass, A e f f , when they differ in their isotope composition. Thus, A e f f is not sufficient to describe the isotope effect of P L H in a consistent manner for all considered isotopes and isotope mixtures. The electron temperature profiles measured at the L-H transition in the outer half of the radius are very similar for all isotopes and isotope mixtures, despite the fact that the L-H power threshold varies by a factor of about six. This finding, together with the observation of an offset linear relation between the L-H power threshold, P L H , and an effective heat diffusivity, χ e f f , indicates that the composition-dependent heat transport in the low confinement mode (L-mode) determines, how much power is needed to reach the necessary electron temperatures at the edge, and hence P L H .",

keywords = "D-T plasma operation, isotope effects, isotope mixtures, L-H transition, transport, tritium plasmas",

author = "G. Birkenmeier and Solano, \{E. R.\} and Carvalho, \{I. S.\} and Hillesheim, \{J. C.\} and E. Delabie and E. Lerche and D. Taylor and D. Gallart and Mantsinen, \{M. J.\} and C. Silva and C. Angioni and F. Ryter and P. Carvalho and M. Fontana and E. Pawelec and Silburn, \{S. A.\} and P. Sir{\'e}n and S. Aleiferis and J. Bernardo and A. Boboc and D. Douai and P. Puglia and P. Jacquet and E. Litherland-Smith and I. Jepu and D. Kos and Sun, \{H. J.\} and A. Shaw and D. King and B. Viola and R. Henriques and Kirov, \{K. K.\} and M. Baruzzo and J. Garcia and A. Hakola and A. Huber and E. Joffrin and D. Keeling and A. Kappatou and M. Lennholm and P. Lomas and \{de la Luna\}, E. and Maggi, \{C. F.\} and J. Mailloux and M. Maslov and Rimini, \{F. G.\} and N. Vianello and G. Verdoolaege and H. Weisen and M. Wischmeier and \{JET Contributors\}",

note = "Publisher Copyright: {\textcopyright} 2023 The Author(s). Published by IOP Publishing Ltd.; 48th EPS Conference on Plasma Physics : Online ; Conference date: 27-06-2022 Through 01-07-2022",

year = "2023",

month = may,

doi = "10.1088/1361-6587/acc423",

language = "English",

volume = "65",

journal = "Plasma Physics and Controlled Fusion",

issn = "0741-3335",

publisher = "Institute of Physics IOP",

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Birkenmeier, G, Solano, ER, Carvalho, IS, Hillesheim, JC, Delabie, E, Lerche, E, Taylor, D, Gallart, D, Mantsinen, MJ, Silva, C, Angioni, C, Ryter, F, Carvalho, P, Fontana, M, Pawelec, E, Silburn, SA, Sirén, P, Aleiferis, S, Bernardo, J, Boboc, A, Douai, D, Puglia, P, Jacquet, P, Litherland-Smith, E, Jepu, I, Kos, D, Sun, HJ, Shaw, A, King, D, Viola, B, Henriques, R, Kirov, KK, Baruzzo, M, Garcia, J, Hakola, A, Huber, A, Joffrin, E, Keeling, D, Kappatou, A, Lennholm, M, Lomas, P, de la Luna, E, Maggi, CF, Mailloux, J, Maslov, M, Rimini, FG, Vianello, N, Verdoolaege, G, Weisen, H, Wischmeier, M & JET Contributors 2023, 'The role of isotope mass and transport for H-mode access in tritium containing plasmas at JET with ITER-like wall', Plasma Physics and Controlled Fusion, vol. 65, no. 5, 054001. https://doi.org/10.1088/1361-6587/acc423

TY - JOUR

T1 - The role of isotope mass and transport for H-mode access in tritium containing plasmas at JET with ITER-like wall

AU - Birkenmeier, G.

AU - Solano, E. R.

AU - Carvalho, I. S.

AU - Hillesheim, J. C.

AU - Delabie, E.

AU - Lerche, E.

AU - Taylor, D.

AU - Gallart, D.

AU - Mantsinen, M. J.

AU - Silva, C.

AU - Angioni, C.

AU - Ryter, F.

AU - Carvalho, P.

AU - Fontana, M.

AU - Pawelec, E.

AU - Silburn, S. A.

AU - Sirén, P.

AU - Aleiferis, S.

AU - Bernardo, J.

AU - Boboc, A.

AU - Douai, D.

AU - Puglia, P.

AU - Jacquet, P.

AU - Litherland-Smith, E.

AU - Jepu, I.

AU - Kos, D.

AU - Sun, H. J.

AU - Shaw, A.

AU - King, D.

AU - Viola, B.

AU - Henriques, R.

AU - Kirov, K. K.

AU - Baruzzo, M.

AU - Garcia, J.

AU - Hakola, A.

AU - Huber, A.

AU - Joffrin, E.

AU - Keeling, D.

AU - Kappatou, A.

AU - Lennholm, M.

AU - Lomas, P.

AU - de la Luna, E.

AU - Maggi, C. F.

AU - Mailloux, J.

AU - Maslov, M.

AU - Rimini, F. G.

AU - Vianello, N.

AU - Verdoolaege, G.

AU - Weisen, H.

AU - Wischmeier, M.

AU - JET Contributors

PY - 2023/5

Y1 - 2023/5

N2 - The required heating power, P L H , to access the high confinement regime (H-mode) in tritium containing plasmas is investigated in JET with ITER-like wall at a toroidal magnetic field of B t = 1.8 T and a plasma current of I p = 1.7 MA. P L H , also referred to as the L-H power threshold, is determined in plasmas of pure tritium as well as mixtures of hydrogen with tritium (H-T) and mixtures of deuterium with tritium (D-T), and is compared to the L-H power threshold in plasmas of pure hydrogen and pure deuterium. It is found that, for otherwise constant parameters, P L H is not the same in plasmas with the same effective isotope mass, A e f f , when they differ in their isotope composition. Thus, A e f f is not sufficient to describe the isotope effect of P L H in a consistent manner for all considered isotopes and isotope mixtures. The electron temperature profiles measured at the L-H transition in the outer half of the radius are very similar for all isotopes and isotope mixtures, despite the fact that the L-H power threshold varies by a factor of about six. This finding, together with the observation of an offset linear relation between the L-H power threshold, P L H , and an effective heat diffusivity, χ e f f , indicates that the composition-dependent heat transport in the low confinement mode (L-mode) determines, how much power is needed to reach the necessary electron temperatures at the edge, and hence P L H .

AB - The required heating power, P L H , to access the high confinement regime (H-mode) in tritium containing plasmas is investigated in JET with ITER-like wall at a toroidal magnetic field of B t = 1.8 T and a plasma current of I p = 1.7 MA. P L H , also referred to as the L-H power threshold, is determined in plasmas of pure tritium as well as mixtures of hydrogen with tritium (H-T) and mixtures of deuterium with tritium (D-T), and is compared to the L-H power threshold in plasmas of pure hydrogen and pure deuterium. It is found that, for otherwise constant parameters, P L H is not the same in plasmas with the same effective isotope mass, A e f f , when they differ in their isotope composition. Thus, A e f f is not sufficient to describe the isotope effect of P L H in a consistent manner for all considered isotopes and isotope mixtures. The electron temperature profiles measured at the L-H transition in the outer half of the radius are very similar for all isotopes and isotope mixtures, despite the fact that the L-H power threshold varies by a factor of about six. This finding, together with the observation of an offset linear relation between the L-H power threshold, P L H , and an effective heat diffusivity, χ e f f , indicates that the composition-dependent heat transport in the low confinement mode (L-mode) determines, how much power is needed to reach the necessary electron temperatures at the edge, and hence P L H .

KW - D-T plasma operation

KW - isotope effects

KW - isotope mixtures

KW - L-H transition

KW - transport

KW - tritium plasmas

UR - https://www.scopus.com/pages/publications/85150929419

U2 - 10.1088/1361-6587/acc423

DO - 10.1088/1361-6587/acc423

M3 - Article in a proceedings journal

AN - SCOPUS:85150929419

SN - 0741-3335

VL - 65

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

IS - 5

M1 - 054001

T2 - 48th EPS Conference on Plasma Physics

Y2 - 27 June 2022 through 1 July 2022

ER -

The role of isotope mass and transport for H-mode access in tritium containing plasmas at JET with ITER-like wall

Abstract

Funding

UN SDGs

Keywords

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