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

TitleImpact of nitrogen seeding on confinement and power load control of a high-triangularity JET ELMy H-mode plasma with a metal wall
Publication TypeJournal Article
Year of Publication2013
AuthorsC. Giroud, G.P Maddison, S. Jachmich, F. Rimini, M.NA 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.J 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-EFDA Contributors
JournalNuclear Fusion
Volume53
Number11
Pagination113025
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.

URLhttp://stacks.iop.org/0029-5515/53/i=11/a=113025
DOI10.1088/0029-5515/53/11/113025
Division

PSI

Department

PSI-E

PID

7d3797a6a25b0cd8d9b26c4b70a4587d

Alternate TitleNucl. Fusion

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