Effects of nitrogen seeding on core ion thermal transport in JET ILW L-mode plasmas

JET contributors

doi:10.1088/1741-4326/aa9e7c

Effects of nitrogen seeding on core ion thermal transport in JET ILW L-mode plasmas

JET contributors

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

26 Scopus citations

Abstract

A set of experiments was carried out in JET ILW (Joint European Torus with ITER-Like Wall) L-mode plasmas in order to study the effects of light impurities on core ion thermal transport. N was puffed into some discharges and its profile was measured by active Charge Exchange diagnostics, while ICRH power was deposited on-and off-Axis in minority scheme in order to have a scan of local heat flux at constant total power with and without N injection. Experimentally, the ion temperature profiles are more peaked for similar heat fluxes when N is injected in the plasma. Gyro-kinetic simulations using the GENE code indicate that a stabilization of Ion Temperature Gradient driven turbulent transport due to main ion dilution and to changes in and s/q is responsible of the enhanced peaking. The quasi-linear models TGLF and QuaLiKiz are tested against the experimental and the gyro-kinetic results.

Original language	English
Article number	026028
Journal	Nuclear Fusion
Volume	58
Issue number	2
DOIs	https://doi.org/10.1088/1741-4326/aa9e7c
State	Published - Feb 2018
Externally published	Yes

Keywords

gyrokinetic simulations
light impurities in JET
nuclear fusion
quasilinear simulations
turbulent transport

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10.1088/1741-4326/aa9e7c

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@article{4912c616bf574b779bdadcc220d30d19,

title = "Effects of nitrogen seeding on core ion thermal transport in JET ILW L-mode plasmas",

abstract = "A set of experiments was carried out in JET ILW (Joint European Torus with ITER-Like Wall) L-mode plasmas in order to study the effects of light impurities on core ion thermal transport. N was puffed into some discharges and its profile was measured by active Charge Exchange diagnostics, while ICRH power was deposited on-and off-Axis in minority scheme in order to have a scan of local heat flux at constant total power with and without N injection. Experimentally, the ion temperature profiles are more peaked for similar heat fluxes when N is injected in the plasma. Gyro-kinetic simulations using the GENE code indicate that a stabilization of Ion Temperature Gradient driven turbulent transport due to main ion dilution and to changes in and s/q is responsible of the enhanced peaking. The quasi-linear models TGLF and QuaLiKiz are tested against the experimental and the gyro-kinetic results.",

keywords = "gyrokinetic simulations, light impurities in JET, nuclear fusion, quasilinear simulations, turbulent transport",

author = "{JET contributors} and N. Bonanomi and P. Mantica and J. Citrin and C. Giroud and E. Lerche and C. Sozzi and D. Taylor and M. Tsalas and {Van Eester}, D. 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. Alfer 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 Wiechec, {A. Baron}",

note = "Publisher Copyright: {\textcopyright} 2018 EURATOM.",

year = "2018",

month = feb,

doi = "10.1088/1741-4326/aa9e7c",

language = "英语",

volume = "58",

journal = "Nuclear Fusion",

issn = "0029-5515",

publisher = "IOP Publishing Ltd.",

number = "2",

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TY - JOUR

T1 - Effects of nitrogen seeding on core ion thermal transport in JET ILW L-mode plasmas

AU - JET contributors

AU - Bonanomi, N.

AU - Mantica, P.

AU - Citrin, J.

AU - Giroud, C.

AU - Lerche, E.

AU - Sozzi, C.

AU - Taylor, D.

AU - Tsalas, M.

AU - Van Eester, D.

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 - Alfer, 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 - Wiechec, A. Baron

PY - 2018/2

Y1 - 2018/2

N2 - A set of experiments was carried out in JET ILW (Joint European Torus with ITER-Like Wall) L-mode plasmas in order to study the effects of light impurities on core ion thermal transport. N was puffed into some discharges and its profile was measured by active Charge Exchange diagnostics, while ICRH power was deposited on-and off-Axis in minority scheme in order to have a scan of local heat flux at constant total power with and without N injection. Experimentally, the ion temperature profiles are more peaked for similar heat fluxes when N is injected in the plasma. Gyro-kinetic simulations using the GENE code indicate that a stabilization of Ion Temperature Gradient driven turbulent transport due to main ion dilution and to changes in and s/q is responsible of the enhanced peaking. The quasi-linear models TGLF and QuaLiKiz are tested against the experimental and the gyro-kinetic results.

AB - A set of experiments was carried out in JET ILW (Joint European Torus with ITER-Like Wall) L-mode plasmas in order to study the effects of light impurities on core ion thermal transport. N was puffed into some discharges and its profile was measured by active Charge Exchange diagnostics, while ICRH power was deposited on-and off-Axis in minority scheme in order to have a scan of local heat flux at constant total power with and without N injection. Experimentally, the ion temperature profiles are more peaked for similar heat fluxes when N is injected in the plasma. Gyro-kinetic simulations using the GENE code indicate that a stabilization of Ion Temperature Gradient driven turbulent transport due to main ion dilution and to changes in and s/q is responsible of the enhanced peaking. The quasi-linear models TGLF and QuaLiKiz are tested against the experimental and the gyro-kinetic results.

KW - gyrokinetic simulations

KW - light impurities in JET

KW - nuclear fusion

KW - quasilinear simulations

KW - turbulent transport

UR - http://www.scopus.com/inward/record.url?scp=85040646858&partnerID=8YFLogxK

U2 - 10.1088/1741-4326/aa9e7c

DO - 10.1088/1741-4326/aa9e7c

M3 - 文章

AN - SCOPUS:85040646858

SN - 0029-5515

VL - 58

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 2

M1 - 026028

ER -

Effects of nitrogen seeding on core ion thermal transport in JET ILW L-mode plasmas

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Keywords

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