Li Li Yue Liu Yueqiang Liu
An analytic model of non-linear feedback stabilization of the resistive wall mode is presented. The non-linearity comes from either the current or the voltage saturation of the control coil power supply. For the so-called flux-to-current control, the current saturation of active coils always results in the loss of control. On the contrary, the flux…
PublishedA. Huber S. Brezinsek Ph. Mertens B. Schweer G. Sergienko et al.
A new endoscope with optimised divertor view has been developed in order to survey and monitor the emission of specific impurities such as tungsten and the remaining carbon as well as beryllium in the tungsten divertor of JET after the implementation of the ITER-like wall in 2011. The endoscope is a prototype for testing an ITER relevant design con…
PublishedD. Nguyen-Manh M.Yu. Lavrentiev M. Muzyk S.L. Dudarev
Generic materials-related problems foreseen in connection with the operation of a fusion power plant present a major challenge for the development of magnetically confined fusion as a commercial power generation option. In this review, we focus on the predictive capabilities of first-principles-based atomistic models for radiation defects and phase…
PublishedE Havlicková W Fundamenski D Tskhakaya G Manfredi D Moulton
Parallel transport associated with Type I ELM filaments in the scrape-off layer (SOL) is studied by means of three computational approaches – fluid, Vlasov and particle-in-cell (PIC). These techniques are benchmarked for convective transients by analyzing power fluxes at the target. In spite of kinetic effects due to fast electrons which are not …
PublishedC. F. Maggi S. Brezinsek M. F. Stamp S. Griph P. Heesterman et al.
In preparation for ITER, JET has been upgraded with a new ITER-like wall (ILW), whereby the main plasma facing components, previously of carbon, have been replaced by mainly Be in the main chamber and W in the divertor. As part of the many diagnostic enhancements, a new, survey, visible spectroscopy diagnostic has been installed for the characteriz…
PublishedM.Yu. Lavrentiev K. Mergia M. Gjoka D. Nguyen-Manh G. Apostolopoulos S.L. Dudarev
We present a combined experimental and computational study of high-temperature magnetic properties of Fe-Cr alloys with chromium content up to about 20 at.%. Magnetic Cluster Expansion method is applied to model the magnetic properties of random Fe-Cr alloys, and in particular the Curie transition temperature, as functions of alloy composition. We …
PublishedS.E. Sharapov
A general introduction is given to ideal magnetohydrodynamic (MHD) waves, using linear perturbations of ideal MHD equations. Subsequently the shear Alfvén waves are shown to form a discrete spectrum of Global Alfvén Eigenmodes in current-carrying cylindrical plasmas and Toroidal Alfvén Eigenmodes in toroidal plasmas. A comparison between theory …
PublishedLeonid E. Zakharov Sergei A. Galkin Sergei N. Gerasimov
This paper describes progress achieved since 2007 in understanding disruptions in tokamaks, when the effect of plasma current sharing with the wall was introduced into theory. As a result, the toroidal asymmetry of the plasma current measurements during vertical disruption event (VDE) on the Joint European Torus was explained. A new kind of plasma …
Published