JET ContributorsLerche, E.Lennholm, M.Carvalho, I. S.Dumortier, P.Durodie, F.Van Eester, D.Graves, J.Jacquet, P.Murari, A.2017-05-012017-05-012017-05-01201710.1088/1741-4326/aa53b6https://infoscience.epfl.ch/handle/20.500.14299/136904WOS:000395672400001A novel technique for sawteeth control in tokamak plasmas using ion-cyclotron resonance heating (ICRH) has been developed in the JET-ILW tokamak. Unlike previous ICRH methods, that explored the destabilization of the internal kink mode when the radio-frequency (RF) wave absorption was placed near the q = 1 surface, the technique presented here consists of stabilizing the sawteeth as fast as possible by applying the ICRH power centrally and subsequently induce a sawtooth crash by switching it off at the appropriate instant. The validation of this method in JET-ILW L-mode discharges, including preliminary tests in H-mode plasmas, is presented.tokamakMHDsawtoothICRHtext::journal::journal article::research article