Integration of a radiative divertor for heat load control into JET high triangularity ELMy H-mode plasmas
- Giroud, C.
- Maddison, G.
- McCormick, K.
- Beurskens, M.N.A.
- Brezinsek, S.
- Devaux, S.
- Eich, T.
- Frassinetti, L.
- Fundamenski, W.
- Groth, M.
- Huber, A.
- Jachmich, S.
- Järvinen, Aaro
- Kallenbach, A.
- Krieger, K.
- Moulton, D.
- Saarelma, S.
- Thomsen, H.
- Wiesen, S.
- Alonso, A.
- Alper, B.
- Arnoux, G.
- Belo, P.
- Boboc, A.
- Brett, A.
- Brix, M.
- Coffey, I.
- De La Luna, E.
- Dodt, D.
- Vries, P. De
- Felton, R.
- Giovanozzi, E.
- Harling, J.
- Harting, D.
- Hawkes, N.
- Hobirk, J.
- Jenkins, I.
- Joffrin, E.
- Kempenaars, M.
- Lehnen, M.
- Loarer, T.
- Lomas, P.
- Mailloux, J.
- McDonald, D.
- Meigs, A.
- Morgan, P.
- Nunes, I.
- Perez Van Thun, C.
- Riccardo, V.
- Rimini, F.
DOIAbstract
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 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 ((48)×10 19m 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...
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