J. Hobirk C. D. Challis A. Kappatou E. Lerche D. Keeling D. King S. Aleiferis E. Alessi F. Auriemma M. Baruzzo E. Belonohy I. S. Carvalho P. Carvalho F. J. Casson A. Chomiczewska J. Citrin I. H. Coffey D. Douai E. Delabie B. Eriksson J. Eriksson O. Ficker A. R. Field M. Fontana L. Frassinetti D. Frigione D. Gallart J. Garcia M. Gelfusa L. Giacomelli E. Giovannozzi C. Giroud M. Goniche C. Ham N. Hawkes R. Henriques J. Hillesheim A. Ho I. Ivanova-Stanik P. Jacquet F. Jaulmes E. Joffrin H. T. Kim V. Kiptily K. Kirov D. Kos E. Kowalska-Strzeciwilk H. Kumpulainen K. Lawson M. Lennholm X. Litaudon P. Lomas E. de la Luna C. Maggi J. Mailloux M. Mantsinen M. Maslov G. Matthews S. Menmuir A. Milocco K. McClements I. G. Miron S. Nowak F. Orsitto L. Piron G. Pucella E. Peluso C. Perez von Thun E. Rachlew C. Reux F. Rimini A. Sahlberg S. Saarelma P. A. Schneider M. Sertoli S. Sharapov S. Silburn A. Sips P. Siren E. Solano Z. Stancar C. Stuart H. Sun D. Valcarcel M. Valisa G. Verdoolaege N. Wendler D. Weston M. Zerbini
The JET hybrid scenario has been developed from low plasma current carbon wall discharges to the record-breaking Deuterium-Tritium plasmas obtained in 2021 with the ITER-like Be/W wall. The development started in pure Deuterium with refinement of the plasma current, and toroidal magnetic field choices and succeeded in solving the heat load challeng…
PublishedL. Piron M. Baruzzo L. Baylor C. D. Challis M. P. Gryaznevich T. C. Hender R. B. Henriques N. Hawkes S. Jachmich E. Joffrin M. Lehnen M. Lennholm Y. Q. Liu J. Mailloux L. Moreira D. Valcarcel
This work describes the usage of Error Field Correction coil system [Barlow I. et al 2001 Fusion Eng. Des. 58-59 189], which is a set of 4 coils located external to the vessel of the JET device, with the aim of introducing non-axisymmetric n=1 magnetic field perturbations in various targeted plasma experiments. Besides being used to characterize…
PurchaseL. Piron T. C. Hender E. Joffrin F. Auriemma P. Buratti R. Paccagnella P. Zanca C. Challis S. Gerasimov R. B. Henriques L. Marrelli P. Lomas F. Rimini D. Terranova
The presence of Error Fields (EFs) in magnetic fusion devices can affect energy confinement and plasma stability by braking plasma rotation, by inducing fast particle losses and being amplified when exploring high-b regimes. The resulting EF Locked Modes (LMs) can be stabilized by NBI injection through the rotation shielding mechanism. However, …
Preprint PublishedS.N. Gerasimov G Artaserse P. Buratti I.S. Carvalho E. de la Luna T.C. Hender R.B. Henriques P.J. Lomas E. Matveeva S. Moradi L. Piron F.G. Rimini G. Szepesi L.E. Zakharov JET Contributors
An n = 1 locked, or slowly rotating, mode has been observed in most pulses prior to JET disruptions. However, a small fraction of non-disruptive pulses has a locked mode which eventually vanishes without disruption. Hence, on JET the locked mode amplitude is routinely used as an indicator of unhealthy plasma. There are two threshold levels…
Preprint PublishedD A Ryan L Piron A Kirk Y Q Liu M Dunne L Li B Dudson W Suttrop the ASDEX Upgrade team the EUROfusion MST1 team
Edge Localised Modes (ELMs) in H-mode tokamak plasmas may be controlled or entirely suppressed by applying 3D magnetic perturbations (MPs). The applied perturbation is amplified by the plasma response, and it has previously been established that the size of the peeling component of this response is a reliable indicator for expected ELM control on A…
PreprintSergei Gerasimov P. Abreu G Artaserse M. Baruzzo P. Buratti I.S. Carvalho I.H. Coffey E. de la Luna T.C. Hender R.B. Henriques R. Felton U. Kruezi P.J. Lomas P. McCullen M. Maslov E. Matveeva S. Moradi L. Piron F.G. Rimini W. Schippers G. Szepesi M. Tsalas L.E. Zakharov
The paper presents an analysis of disruptions occurring during JET-ILW plasma operations covering the period from the start of ILW (ITER-like wall) operation up to completion of JET operation in 2016. The total number of disruptions was 1951 including 466 with deliberately induced disruptions. The average disruption rate of unintended disruptions i…
Preprint PublishedL. Piron A. Kirk Y. Q. Liu G. Cunningham M. Carr G. Fishpool R. Gowland I. Katramados D. Luckin R. Martin
In magnetic fusion devices, unwanted non-axisymmetric magnetic eld perturbations, known as error fields (EF), can have detrimental effects on plasma stability and confinement. To minimize their impact on plasma performances and on the available operational space, it is important to identify the EF sources and develop EF control strategies. MAST Up…
Preprint PurchaseL. Piron B. Zaniol D. Bonfiglio L. Carraro A. Kirk L. Marrelli R. Martin C. Piron P. Piovesan M. Zuin
This work presents the first evidence of helical flow in RFX-mod q(a) < 2 tokamak plasmas. The flow pattern is characterized by the presence of convective cells with m = 1 and n = 1 periodicity in the poloidal and toroidal direction, respectively. A similar helical flow deformation has been observed in the same device when operatedfas a Reversed…
Preprint Published