Impact of nitrogen seeding on confinement and power load control of a high-triangularity JET ELMy H-mode plasma with a metal wall

C. Giroud; G. P. Maddison; S. Jachmich; F. Rimini; M. N.A. Beurskens; I. Balboa; S. Brezinsek; R. Coelho; J. W. Coenen; L. Frassinetti; E. Joffrin; M. Oberkofler; M. Lehnen; Y. Liu; S. Marsen; K. McCormick; A. Meigs; R. Neu; B. Sieglin; G. Van Rooij; G. Arnoux; P. Belo; M. Brix; M. Clever; I. Coffey; S. Devaux; D. Douai; T. Eich; J. Flanagan; S. Grünhagen; A. Huber; M. Kempenaars; U. Kruezi; K. Lawson; P. Lomas; C. Lowry; I. Nunes; A. Sirinnelli; A. C.C. Sips; M. Stamp; S. Wiesen

doi:10.1088/0029-5515/53/11/113025

Impact of nitrogen seeding on confinement and power load control of a high-triangularity JET ELMy H-mode plasma with a metal wall

C. Giroud
, G. P. Maddison
, S. Jachmich
, F. Rimini
, M. N.A. Beurskens
, I. Balboa
, S. Brezinsek
, R. Coelho
, J. W. Coenen
, L. Frassinetti
, E. Joffrin
, M. Oberkofler
, M. Lehnen
, Y. Liu
, S. Marsen
, K. McCormick
, A. Meigs
, R. Neu
, B. Sieglin
, G. Van Rooij

G. Arnoux, P. Belo, M. Brix, M. Clever, I. Coffey, S. Devaux, D. Douai, T. Eich, J. Flanagan, S. Grünhagen, A. Huber, M. Kempenaars, U. Kruezi, K. Lawson, P. Lomas, C. Lowry, I. Nunes, A. Sirinnelli, A. C.C. Sips, M. Stamp, S. Wiesen

JET Joint Undertaking
Culham Centre for Fusion Energy
LPP-ERM/KMS
Forschungszentrum Jülich (FZJ)
Instituto Superior Técnico
Center for Autonomous Systems
IRFM, CEA
Max Planck Institute for Plasma Physics
Institute of Plasma Physics Chinese Academy of Sciences
EURATOM Association
Queen's University Belfast

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

129 Scopus citations

Abstract

This paper reports the impact on confinement and power load of the high-shape 2.5 MA ELMy H-mode scenario at JET of a change from all carbon plasma-facing components to an all metal wall. In preparation to this change, systematic studies of power load reduction and impact on confinement as a result of fuelling in combination with nitrogen seeding were carried out in JET-C and are compared with their counterpart in JET with a metallic wall. An unexpected and significant change is reported on the decrease in the pedestal confinement but is partially recovered with the injection of nitrogen.

Original language	English
Article number	113025
Journal	Nuclear Fusion
Volume	53
Issue number	11
DOIs	https://doi.org/10.1088/0029-5515/53/11/113025
State	Published - Nov 2013
Externally published	Yes

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Giroud, C., Maddison, G. P., Jachmich, S., Rimini, F., Beurskens, M. N. A., Balboa, I., Brezinsek, S., Coelho, R., Coenen, J. W., Frassinetti, L., Joffrin, E., Oberkofler, M., Lehnen, M., Liu, Y., Marsen, S., McCormick, K., Meigs, A., Neu, R., Sieglin, B., ... Wiesen, S. (2013). Impact of nitrogen seeding on confinement and power load control of a high-triangularity JET ELMy H-mode plasma with a metal wall. Nuclear Fusion, 53(11), Article 113025. https://doi.org/10.1088/0029-5515/53/11/113025

@article{d54e5e0f1c1543829b90814409cff54a,

title = "Impact of nitrogen seeding on confinement and power load control of a high-triangularity JET ELMy H-mode plasma with a metal wall",

abstract = "This paper reports the impact on confinement and power load of the high-shape 2.5 MA ELMy H-mode scenario at JET of a change from all carbon plasma-facing components to an all metal wall. In preparation to this change, systematic studies of power load reduction and impact on confinement as a result of fuelling in combination with nitrogen seeding were carried out in JET-C and are compared with their counterpart in JET with a metallic wall. An unexpected and significant change is reported on the decrease in the pedestal confinement but is partially recovered with the injection of nitrogen.",

author = "C. Giroud and Maddison, \{G. P.\} and S. Jachmich and F. Rimini and Beurskens, \{M. N.A.\} and I. Balboa and S. Brezinsek and R. Coelho and Coenen, \{J. W.\} and L. Frassinetti and E. Joffrin and M. Oberkofler and M. Lehnen and Y. Liu and S. Marsen and K. McCormick and A. Meigs and R. Neu and B. Sieglin and \{Van Rooij\}, G. and G. Arnoux and P. Belo and M. Brix and M. Clever and I. Coffey and S. Devaux and D. Douai and T. Eich and J. Flanagan and S. Gr{\"u}nhagen and A. Huber and M. Kempenaars and U. Kruezi and K. Lawson and P. Lomas and C. Lowry and I. Nunes and A. Sirinnelli and Sips, \{A. C.C.\} and M. Stamp and S. Wiesen",

year = "2013",

month = nov,

doi = "10.1088/0029-5515/53/11/113025",

language = "English",

volume = "53",

journal = "Nuclear Fusion",

issn = "0029-5515",

publisher = "IOP Publishing Ltd.",

number = "11",

}

Giroud, C, Maddison, GP, Jachmich, S, Rimini, F, Beurskens, MNA, Balboa, I, Brezinsek, S, Coelho, R, Coenen, JW, Frassinetti, L, Joffrin, E, Oberkofler, M, Lehnen, M, Liu, Y, Marsen, S, McCormick, K, Meigs, A, Neu, R, Sieglin, B, Van Rooij, G, Arnoux, G, Belo, P, Brix, M, Clever, M, Coffey, I, Devaux, S, Douai, D, Eich, T, Flanagan, J, Grünhagen, S, Huber, A, Kempenaars, M, Kruezi, U, Lawson, K, Lomas, P, Lowry, C, Nunes, I, Sirinnelli, A, Sips, ACC, Stamp, M & Wiesen, S 2013, 'Impact of nitrogen seeding on confinement and power load control of a high-triangularity JET ELMy H-mode plasma with a metal wall', Nuclear Fusion, vol. 53, no. 11, 113025. https://doi.org/10.1088/0029-5515/53/11/113025

TY - JOUR

T1 - Impact of nitrogen seeding on confinement and power load control of a high-triangularity JET ELMy H-mode plasma with a metal wall

AU - Giroud, C.

AU - Maddison, G. P.

AU - Jachmich, S.

AU - Rimini, F.

AU - Beurskens, M. N.A.

AU - Balboa, I.

AU - Brezinsek, S.

AU - Coelho, R.

AU - Coenen, J. W.

AU - Frassinetti, L.

AU - Joffrin, E.

AU - Oberkofler, M.

AU - Lehnen, M.

AU - Liu, Y.

AU - Marsen, S.

AU - McCormick, K.

AU - Meigs, A.

AU - Neu, R.

AU - Sieglin, B.

AU - Van Rooij, G.

AU - Arnoux, G.

AU - Belo, P.

AU - Brix, M.

AU - Clever, M.

AU - Coffey, I.

AU - Devaux, S.

AU - Douai, D.

AU - Eich, T.

AU - Flanagan, J.

AU - Grünhagen, S.

AU - Huber, A.

AU - Kempenaars, M.

AU - Kruezi, U.

AU - Lawson, K.

AU - Lomas, P.

AU - Lowry, C.

AU - Nunes, I.

AU - Sirinnelli, A.

AU - Sips, A. C.C.

AU - Stamp, M.

AU - Wiesen, S.

PY - 2013/11

Y1 - 2013/11

N2 - This paper reports the impact on confinement and power load of the high-shape 2.5 MA ELMy H-mode scenario at JET of a change from all carbon plasma-facing components to an all metal wall. In preparation to this change, systematic studies of power load reduction and impact on confinement as a result of fuelling in combination with nitrogen seeding were carried out in JET-C and are compared with their counterpart in JET with a metallic wall. An unexpected and significant change is reported on the decrease in the pedestal confinement but is partially recovered with the injection of nitrogen.

AB - This paper reports the impact on confinement and power load of the high-shape 2.5 MA ELMy H-mode scenario at JET of a change from all carbon plasma-facing components to an all metal wall. In preparation to this change, systematic studies of power load reduction and impact on confinement as a result of fuelling in combination with nitrogen seeding were carried out in JET-C and are compared with their counterpart in JET with a metallic wall. An unexpected and significant change is reported on the decrease in the pedestal confinement but is partially recovered with the injection of nitrogen.

UR - https://www.scopus.com/pages/publications/84887125646

U2 - 10.1088/0029-5515/53/11/113025

DO - 10.1088/0029-5515/53/11/113025

M3 - Article

AN - SCOPUS:84887125646

SN - 0029-5515

VL - 53

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 11

M1 - 113025

ER -

Impact of nitrogen seeding on confinement and power load control of a high-triangularity JET ELMy H-mode plasma with a metal wall

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