P. J. Lomas

TL;DR: In this paper, the authors describe a two-stage MHD instability, where the first stage is caused by a loss of energy from the central region and the second stage is due to an increase in impurity radiation.

TL;DR: In this paper, high fusion power experiments using DT mixtures in ELM-free H mode and optimized shear regimes in JET are reported, and a fusion power of 16.1 MW has been produced in an ELM free H mode at 4.2 MA/3.

TL;DR: Experiments in the JET tokamak with additional heating power above 5 MW show that the plasma can undergo a transition to a new regime and an improvement in the glogal energy confinement time of up to 20% is observed.

TL;DR: Work is in progress to completely replace, in 2008/9, the existing JET CFC tiles with a configuration of plasma facing materials consistent with the ITER design.

TL;DR: In this article, the relative Type I ELM plasma energy loss (to the pedestal energy) is found to correlate well with the collisionality of the pedestals, showing a weak dependence on the method used to achieve those pedestal plasma parameters: plasma shaping, heating, pellet injection and impurity seeding.