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Runaway electrons in JET disruptions

V.V. Plyusnin; V. Riccardo; R. Jaspers; M.F. Johnson; V.G. Kiptily; Francisco José Batista Salzedas; T.C. Hender; E. de La Luna; JET EFDA contributors


Behavior of Density Fluctuations and Electron Temperature Profiles in JET Densi...

Francisco José Batista Salzedas; L. Meneses; E. de La Luna; V. Plyusnin; V. Riccardo; R. Jaspers; T.C. Hender; F. Serra; JET EFDA contributors

The sudden degradation of the energy confinement characterizing major density limit disruptions, has been observed to initiate close to the q=2 surface, in a small and medium size tokamak. A flattening of the electron temperature profile spreads inwards from the outboard O-point of the 2/1 mode. This initiates the destruction of the energy confinement. This paper reports on observations of this sequence of ev...


Sawtooth, Neo-Classical Tearing Mode and Error Field Studies in JET

T. C. Hender; O. Sauter; B. Alper; C. Angioni; M. Baar; M. Benedetti; P. Belo; M. Bigi; D. N. Borba; T. Bolzonella; R. Budny; R. J. Buttery

A range of ITER relevant plasma stability issues have been studied in the JET tokamak; these include the effects of fast particles on sawteeth, control of NTMs via sawteeth seeds, scaling of (2,1) NTM thresholds and the effect of error fields on plasma rotation and vice-versa. The sawtooth studies have examined both the effects of ICRF and NBI fast particles, and models used for ITER predictions have been valid...


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