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

JET Contributors

doi:10.1088/1741-4326/aab1bb

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

JET Contributors

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

33 Scopus citations

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
State	Published - Jun 29 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 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. 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.

Funders	Funder number
Euratom research and training programme 2014–2018
TGCC
U.S. Department of Energy	DE-FG02-99ER54563
U.S. Department of Energy
Horizon 2020 Framework Programme	633053
Horizon 2020 Framework Programme
Research Councils UK	EP/P012450/1
Research Councils UK
European Commission
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
Grand Équipement National De Calcul Intensif

Keywords

DT plasmas
JET
TAEs
alphas
instabilities
scenario

UN SDGs

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

Access to Document

10.1088/1741-4326/aab1bb

Cite this

@article{7dccc51991904aefa96dbe70e9e9ff82,

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

author = "{JET Contributors} 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 O. Asunta and F. Auriemma 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 = jun,

day = "29",

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

language = "English",

volume = "58",

journal = "Nuclear Fusion",

issn = "0029-5515",

publisher = "IOP Publishing",

number = "8",

}

TY - JOUR

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

AU - JET Contributors

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 - Asunta, O.

AU - Auriemma, F.

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 - 2018/6/29

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 - DT plasmas

KW - JET

KW - TAEs

KW - alphas

KW - instabilities

KW - scenario

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

SN - 0029-5515

VL - 58

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 8

M1 - 082005

ER -

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

Abstract

Funding

Keywords

UN SDGs

Access to Document

Other files and links

Fingerprint

Cite this