Scenario development for the observation of alpha-driven instabilities in JET DT plasmas

Remi Dumont; J. Mailloux; V. Aslanyan; M. Baruzzo; C.D. Challis; I. Coffey; A. Czarnecka; E. Delabie; J. Eriksson; J.M. Faustin; J. Ferreira; M. Fitzgerald; J. García; L. Giacomelli; C. Giroud; N. Hawkes; Ph. Jacquet; E. Joffrin; T. Johnson; D. Keeling; D. King; V. Kiptily; B. Lomanowski; E. Lerche; M. Mantsinen; L. Meneses; S. Menmuir; K. McClements; S. Moradi; F. Nabais; M. Nocente; A. Patel; H. Patten; P. Puglia; R. Scannell; S. Sharapov; E.R. Solano; M. Tsalas; P. Vallejos; H. Weisen; 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/aab1bb

Scenario development for the observation of alpha-driven instabilities in JET DT plasmas

Remi Dumont (Corresponding Author), J. Mailloux, V. Aslanyan, M. Baruzzo, C.D. Challis, I. Coffey, A. Czarnecka, E. Delabie, J. Eriksson, J.M. Faustin, J. Ferreira, M. Fitzgerald, J. García, L. Giacomelli, C. Giroud, N. Hawkes, Ph. Jacquet, E. Joffrin, T. Johnson, D. KeelingD. King, V. Kiptily, B. Lomanowski, E. Lerche, M. Mantsinen, L. Meneses, S. Menmuir, K. McClements, S. Moradi, F. Nabais, M. Nocente, A. Patel, H. Patten, P. Puglia, R. Scannell, S. Sharapov, E.R. Solano, M. Tsalas, P. Vallejos, H. Weisen, 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

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23 Citations (Scopus)

Abstract

In DT plasmas, toroidal Alfvén eigenmodes (TAEs) can be made unstable by the alpha particles resulting from fusion reactions, and may induce a significant redistribution of fast ions. Recent experiments have been conducted in JET deuterium plasmas in order to prepare scenarios aimed at observing alpha-driven TAEs in a future JET DT campaign. Discharges at low density, large core temperatures associated with the presence of internal transport barriers and characterised by good energetic ion confinement have been performed. ICRH has been used in the hydrogen minority heating regime to probe the TAE stability. The consequent presence of MeV ions has resulted in the observation of TAEs in many instances. The impact of several key parameters on TAE stability could therefore be studied experimentally. Modeling taking into account NBI and ICRH fast ions shows good agreement with the measured neutron rates, and has allowed predictions for DT plasmas to be performed.

Original language	English
Article number	082005
Journal	Nuclear Fusion
Volume	58
Issue number	8
DOIs	https://doi.org/10.1088/1741-4326/aab1bb
Publication status	Published - 29 Jun 2018
MoE publication type	A1 Journal article-refereed

Keywords

alphas
DT plasmas
instabilities
JET
scenario
TAEs

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10.1088/1741-4326/aab1bb

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Dumont, R., Mailloux, J., Aslanyan, V., Baruzzo, M., Challis, C. D., Coffey, I., Czarnecka, A., Delabie, E., Eriksson, J., Faustin, J. M., Ferreira, J., Fitzgerald, M., García, J., Giacomelli, L., Giroud, C., Hawkes, N., Jacquet, P., Joffrin, E., Johnson, T., ... JET Contributors (2018). Scenario development for the observation of alpha-driven instabilities in JET DT plasmas. Nuclear Fusion, 58(8), [082005]. https://doi.org/10.1088/1741-4326/aab1bb

@article{21e9a39b0dd243efa0bac4a86c01bdf2,

title = "Scenario development for the observation of alpha-driven instabilities in JET DT plasmas",

abstract = "In DT plasmas, toroidal Alfv{\'e}n eigenmodes (TAEs) can be made unstable by the alpha particles resulting from fusion reactions, and may induce a significant redistribution of fast ions. Recent experiments have been conducted in JET deuterium plasmas in order to prepare scenarios aimed at observing alpha-driven TAEs in a future JET DT campaign. Discharges at low density, large core temperatures associated with the presence of internal transport barriers and characterised by good energetic ion confinement have been performed. ICRH has been used in the hydrogen minority heating regime to probe the TAE stability. The consequent presence of MeV ions has resulted in the observation of TAEs in many instances. The impact of several key parameters on TAE stability could therefore be studied experimentally. Modeling taking into account NBI and ICRH fast ions shows good agreement with the measured neutron rates, and has allowed predictions for DT plasmas to be performed.",

keywords = "alphas, DT plasmas, instabilities, JET, scenario, TAEs",

author = "Remi Dumont and J. Mailloux and V. Aslanyan and M. Baruzzo and C.D. Challis and I. Coffey and A. Czarnecka and E. Delabie and J. Eriksson and J.M. Faustin and J. Ferreira and M. Fitzgerald and J. Garc{\'i}a and L. Giacomelli and C. Giroud and N. Hawkes and Ph. Jacquet and E. Joffrin and T. Johnson and D. Keeling and D. King and V. Kiptily and B. Lomanowski and E. Lerche and M. Mantsinen and L. Meneses and S. Menmuir and K. McClements and S. Moradi and F. Nabais and M. Nocente and A. Patel and H. Patten and P. Puglia and R. Scannell and S. Sharapov and E.R. Solano and M. Tsalas and P. Vallejos and H. Weisen and Leena Aho-Mantila and Markus Airila and Antti Hakola and Aaro J{\"a}rvinen and Juuso Karhunen and Seppo Koivuranta and Aki Lahtinen and Jari Likonen and H. Nordman and T. Makkonen and Antti Salmi and M.I.K. Santala and Paula Sir{\'e}n and Tuomas Tala and {JET Contributors}",

note = "Funding Information: 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 and from the RCUK Energy Programme [grant number EP/P012450/1]. The views and opinions expressed herein do not necessarily reflect those of the European Commission. Support for the US group was provided by the US DOE under Grant Number DE-FG02-99ER54563. This work was supported in part by the Swiss National Science Foundation, and was granted access to the HPC resources of TGCC under the allocation 2017-A0010506088 made by GENCI. Funding Information: The views and opinions expressed herein do not necessarily reflect those of the European Commission. Support for the US group was provided by the US DOE under Grant Number DE-FG02-99ER54563. This work was supported in part by the Swiss National Science Foundation, and was granted access to the HPC resources of TGCC under the allocation 2017-A0010506088 made by GENCI. Publisher Copyright: {\textcopyright} EURATOM 2018.",

year = "2018",

month = jun,

day = "29",

doi = "10.1088/1741-4326/aab1bb",

language = "English",

volume = "58",

journal = "Nuclear Fusion",

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publisher = "Institute of Physics IOP",

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Dumont, R, Mailloux, J, Aslanyan, V, Baruzzo, M, Challis, CD, Coffey, I, Czarnecka, A, Delabie, E, Eriksson, J, Faustin, JM, Ferreira, J, Fitzgerald, M, García, J, Giacomelli, L, Giroud, C, Hawkes, N, Jacquet, P, Joffrin, E, Johnson, T, Keeling, D, King, D, Kiptily, V, Lomanowski, B, Lerche, E, Mantsinen, M, Meneses, L, Menmuir, S, McClements, K, Moradi, S, Nabais, F, Nocente, M, Patel, A, Patten, H, Puglia, P, Scannell, R, Sharapov, S, Solano, ER, Tsalas, M, Vallejos, P, Weisen, H, Aho-Mantila, L , Airila, M , Hakola, A , Järvinen, A , Karhunen, J, Koivuranta, S, Lahtinen, A, Likonen, J , Salmi, A, Sirén, P, Tala, T & JET Contributors 2018, 'Scenario development for the observation of alpha-driven instabilities in JET DT plasmas', Nuclear Fusion, vol. 58, no. 8, 082005. https://doi.org/10.1088/1741-4326/aab1bb

TY - JOUR

T1 - Scenario development for the observation of alpha-driven instabilities in JET DT plasmas

AU - Dumont, Remi

AU - Mailloux, J.

AU - Aslanyan, V.

AU - Baruzzo, M.

AU - Challis, C.D.

AU - Coffey, I.

AU - Czarnecka, A.

AU - Delabie, E.

AU - Eriksson, J.

AU - Faustin, J.M.

AU - Ferreira, J.

AU - Fitzgerald, M.

AU - García, J.

AU - Giacomelli, L.

AU - Giroud, C.

AU - Hawkes, N.

AU - Jacquet, Ph.

AU - Joffrin, E.

AU - Johnson, T.

AU - Keeling, D.

AU - King, D.

AU - Kiptily, V.

AU - Lomanowski, B.

AU - Lerche, E.

AU - Mantsinen, M.

AU - Meneses, L.

AU - Menmuir, S.

AU - McClements, K.

AU - Moradi, S.

AU - Nabais, F.

AU - Nocente, M.

AU - Patel, A.

AU - Patten, H.

AU - Puglia, P.

AU - Scannell, R.

AU - Sharapov, S.

AU - Solano, E.R.

AU - Tsalas, M.

AU - Vallejos, P.

AU - Weisen, H.

AU - Aho-Mantila, Leena

AU - Airila, Markus

AU - Hakola, Antti

AU - Järvinen, Aaro

AU - Karhunen, Juuso

AU - Koivuranta, Seppo

AU - Lahtinen, Aki

AU - Likonen, Jari

AU - Nordman, H.

AU - Makkonen, T.

AU - Salmi, Antti

AU - Santala, M.I.K.

AU - Sirén, Paula

AU - Tala, Tuomas

AU - JET Contributors

N1 - Funding Information: 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 and from the RCUK Energy Programme [grant number EP/P012450/1]. The views and opinions expressed herein do not necessarily reflect those of the European Commission. Support for the US group was provided by the US DOE under Grant Number DE-FG02-99ER54563. This work was supported in part by the Swiss National Science Foundation, and was granted access to the HPC resources of TGCC under the allocation 2017-A0010506088 made by GENCI. Funding Information: The views and opinions expressed herein do not necessarily reflect those of the European Commission. Support for the US group was provided by the US DOE under Grant Number DE-FG02-99ER54563. This work was supported in part by the Swiss National Science Foundation, and was granted access to the HPC resources of TGCC under the allocation 2017-A0010506088 made by GENCI. Publisher Copyright: © EURATOM 2018.

PY - 2018/6/29

Y1 - 2018/6/29

N2 - In DT plasmas, toroidal Alfvén eigenmodes (TAEs) can be made unstable by the alpha particles resulting from fusion reactions, and may induce a significant redistribution of fast ions. Recent experiments have been conducted in JET deuterium plasmas in order to prepare scenarios aimed at observing alpha-driven TAEs in a future JET DT campaign. Discharges at low density, large core temperatures associated with the presence of internal transport barriers and characterised by good energetic ion confinement have been performed. ICRH has been used in the hydrogen minority heating regime to probe the TAE stability. The consequent presence of MeV ions has resulted in the observation of TAEs in many instances. The impact of several key parameters on TAE stability could therefore be studied experimentally. Modeling taking into account NBI and ICRH fast ions shows good agreement with the measured neutron rates, and has allowed predictions for DT plasmas to be performed.

AB - In DT plasmas, toroidal Alfvén eigenmodes (TAEs) can be made unstable by the alpha particles resulting from fusion reactions, and may induce a significant redistribution of fast ions. Recent experiments have been conducted in JET deuterium plasmas in order to prepare scenarios aimed at observing alpha-driven TAEs in a future JET DT campaign. Discharges at low density, large core temperatures associated with the presence of internal transport barriers and characterised by good energetic ion confinement have been performed. ICRH has been used in the hydrogen minority heating regime to probe the TAE stability. The consequent presence of MeV ions has resulted in the observation of TAEs in many instances. The impact of several key parameters on TAE stability could therefore be studied experimentally. Modeling taking into account NBI and ICRH fast ions shows good agreement with the measured neutron rates, and has allowed predictions for DT plasmas to be performed.

KW - alphas

KW - DT plasmas

KW - instabilities

KW - JET

KW - scenario

KW - TAEs

UR - http://www.scopus.com/inward/record.url?scp=85050403274&partnerID=8YFLogxK

U2 - 10.1088/1741-4326/aab1bb

DO - 10.1088/1741-4326/aab1bb

M3 - Article

AN - SCOPUS:85050403274

VL - 58

JO - Nuclear Fusion

JF - Nuclear Fusion

SN - 0029-5515

IS - 8

M1 - 082005

ER -

Scenario development for the observation of alpha-driven instabilities in JET DT plasmas

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Keywords

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