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

School of Mathematics and Physics

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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
Publication status	Published - 27 Sep 2013

ASJC Scopus subject areas

Condensed Matter Physics
Nuclear and High Energy Physics

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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
© 2013 IAEA, Vienna
Accepted author manuscript, 2.14 MB

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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), [113025]. https://doi.org/10.1088/0029-5515/53/11/113025

@article{588b9ce1bc13415cb53144a30078b3fb,

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 Ivor Coffey and S. Devaux and D. Douai and T. Eich and J. Flanagan and S. Grunhagen 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 = sep,

day = "27",

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

language = "English",

volume = "53",

journal = "NUCLEAR FUSION",

issn = "0029-5515",

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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, Grunhagen, 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, Ivor

AU - Devaux, S.

AU - Douai, D.

AU - Eich, T.

AU - Flanagan, J.

AU - Grunhagen, 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 - 2013/9/27

Y1 - 2013/9/27

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.

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

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

M3 - Article

VL - 53

JO - NUCLEAR FUSION

JF - NUCLEAR FUSION

SN - 0029-5515

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

Abstract

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