Active control of type-I edge localized modes on JET
- Liang, Y.
- Koslowski, H. R.
- Thomas, P. R.
- Nardon, E.
- Jachmich, S.
- Alper, B.
- Andrew, P.
- Andrew, Y.
- Arnoux, G.
- Baranov, Y.
- Becoulet, M.
- Beurskens, M.
- Biewer, T.
- Bigi, M.
- Crombé, Kristel
- De La Luna, E.
- de Vries, P.
- Eich, T.
- Esser, H. G.
- Fundamenski, W.
- Gerasimov, S.
- Giroud, C.
- Gryaznevich, M. P.
- Harting, D.
- Hawkes, N.
- Hotchin, S.
- Howell, D.
- Huber, A.
- Jakubowski, M.
- Kiptily, V.
- Kreter, A.
- Moreira, L.
- Parail, V.
- Pinches, S. D.
- Rachlew, E.
- Schmitz, O.
- Zimmermann, O.
DOIAbstract
The operational domain for active control of type-I edge localized modes (ELMs) with an n = 1 external magnetic perturbation field induced by the ex-vessel error field correction coils on JET has been developed towards more ITER-relevant regimes with high plasma triangularity, up to 0.45, high normalized beta, up to 3.0, plasma current up to 2.0 MA and q(95) varied between 3.0 and 4.8. The results of ELM mitigation in high triangularity plasmas show that the frequency of type-I ELMs increased by a factor of 4 during the application of the n = 1 fields, while the energy loss per ELM, Delta W/W, decreased from 6% to below the noise level of the diamagnetic measurement (<2%). No reduction of confinement quality (H98Y) during the ELM mitigation...
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