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1.	Giroud, C., et al. (author) Integration of a radiative divertor for heat load control into JET high triangularity ELMy H-mode plasmas 2012 In: Nuclear Fusion. - : IOP Publishing. - 0029-5515 .- 1741-4326. ; 52:6, s. 063022- Journal article (peer-reviewed)abstract Experiments on JET with a carbon-fibre composite wall have explored the reduction of steady-state power load in an ELMy H-mode scenario at high Greenwald fraction similar to 0.8, constant power and close to the L to H transition. This paper reports a systematic study of power load reduction due to the effect of fuelling in combination with seeding over a wide range of pedestal density ((4-8) x 10(19) m(-3)) with detailed documentation of divertor, pedestal and main plasma conditions, as well as a comparative study of two extrinsic impurity nitrogen and neon. It also reports the impact of steady-state power load reduction on the overall plasma behaviour, as well as possible control parameters to increase fuel purity. Conditions from attached to fully detached divertor were obtained during this study. These experiments provide reference plasmas for comparison with a future JET Be first wall and an all W divertor where the power load reduction is mandatory for operation.
2.	Giroud, C., et al. (author) Impact of nitrogen seeding on confinement and power load control of a high-triangularity JET ELMy H-mode plasma with a metal wall 2013 In: Nuclear Fusion. - : IOP Publishing. - 0029-5515 .- 1741-4326. ; 53:11, s. 113025- Journal article (peer-reviewed)abstract This paper reports the impact on confinement and power load of the high-shape 2.5MA 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.

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Type of publication: journal article (2)

Type of content: peer-reviewed (2)

Author/Editor: Arnoux, G (2); Brezinsek, S (2); Brix, M (2); Coffey, I (2); Devaux, S (2); Eich, T (2); show more...; Frassinetti, Lorenzo (2); Giroud, C (2); Huber, A (2); Jachmich, S (2); Joffrin, E (2); Kempenaars, M (2); Lehnen, M (2); McCormick, K (2); Nunes, I (2); Wiesen, S (2); Belo, P. (2); Alonso, A. (1); Liu, Y. (1); Krieger, K. (1); Alper, B (1); Balboa, I (1); Boboc, A (1); Brett, A (1); Clever, M (1); Coelho, R (1); de la Luna, E (1); Dodt, D (1); Douai, D (1); Flanagan, J (1); Fundamenski, W (1); Groth, M (1); Harting, D (1); Hobirk, J (1); Jarvinen, A (1); Jenkins, I (1); Kallenbach, A (1); Kruezi, U (1); Loarer, T (1); Lowry, C (1); Mailloux, J (1); Marsen, S (1); Neu, R (1); Oberkofler, M (1); Riccardo, V (1); Saarelma, S (1); Sieglin, B (1); Voitsekhovitch, I (1); Mcdonald, D. (1); Moulton, D (1); show less...

University: Royal Institute of Technology (2)

Language: English (2)

Research subject (UKÄ/SCB): Natural sciences (2)

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