T. Franke E. Barbato A. Cardinali S. Ceccuzzi R. Cesario D. V. Eester E. Lerche M.-L. Mayoral F. Mirizzi M. Nightingale J.-M. Noterdaeme E. Poli A. A. Tuccillo R. Wenninger H. Zohm
The aim of driving a sufficient amount of plasma current with an appropriate radial current density profile is considered as one of the key challenges for a tokamak fusion power plant in steady state operation. Furthermore, efficient heating to enable transition to regime of enhanced confinement and to achieve breakeven plasma temperatures as well …
PublishedR.A. Bamford B. Kellett J. Bradford T.N. Todd M.G. Benton Sr R. Stafford-Allen E.P. Alves L. Silva C. Collingwood I.A. Crawford R. Bingham
If mankind is to explore the solar system beyond the confines of our Earth and Moon the problem of radiation protection must be addressed. Galactic cosmic rays and highly variable energetic solar particles are an ever-present hazard in interplanetary space. Electric and/or magnetic fields have been suggested as deflection shields in the past, but t…
PublishedR. Neu G. Arnoux M. Beurskens V. Bobkov S. Brezinsek et al.
To consolidate International Thermonuclear Experimental Reactor (ITER) design choices and prepare for its operation, Joint European Torus (JET) has implemented ITER’s plasma facing materials, namely, Be for the main wall and W in the divertor. In addition, protection systems, diagnostics, and the vertical stability control were upgraded and the h…
PublishedI. T. Chapman A. Kirk C. J. Ham J. R. Harrison Y. Q. Liu et al.
Type-I Edge Localised Modes (ELMs) have been mitigated in MAST through the application of n = 3, 4, and 6 resonant magnetic perturbations. For each toroidal mode number of the non-axisymmetric applied fields, the frequency of the ELMs has been increased significantly, and the peak heat flux on the divertor plates reduced commensurately. This increa…
PublishedJ. R. Robinson B. Hnat A. Thyagaraja K. G. McClements P. J. Knight et al.
Following recent observations suggesting the presence of the geodesic acoustic mode (GAM) in ohmically heated discharges in the Mega Amp Spherical Tokamak (MAST) [J. R. Robinson et al., Plasma Phys. Controlled Fusion 54, 105007 (2012)], the behaviour of the GAM is studied numerically using the two fluid, global code CENTORI [P. J. Knight et al. Com…
PublishedM.Yu. Lavrentiev D. Nguyen-Manh J. Wrobel S.L. Dudarev
We develop a Magnetic Cluster Expansion (MCE) model for binary bcc and fcc Fe–Cr alloys, as well as for fcc Fe-Ni alloys, and apply it to the investigation of magnetic properties of these alloys over a broad interval of concentrations, and over a broad interval of temperatures extending well over 1000 K. We show how an MCE-based Monte Carlo study…
PublishedJean-Christophe Sublet James Eastwood Guy Morgan Arjan Koning Dimitri Rochman
EASY-II is designed as a functional replacement for the previous European Activation System, EASY-2010. It has extended nuclear data and new software, FISPACT-II, written in object-style Fortran to provide new capabilities for predictions of activation, transmutation, depletion and burnup. The new FISPACT-II code has allowed us to implement many mo…
PublishedD. Nguyen-Manh Pui-Wai Ma M.Yu. Lavrentiev S.L. Dudarev
The development of quantitative models for radiation damage effects in iron, iron alloys and steels, particularly for the high temperature properties of the alloys, requires understanding of magnetic interactions, which control the phase stability of ferritic-martensitic, ferritic, and austenitic steels. In this work, disordered magnetic configurat…
PublishedT. O’Gorman G. Naylor K. J. Gibson B. Huang G. J. Mcardle et al.
A real-time system has been developed to trigger both the MAST Thomson scattering (TS) system and the plasma control system on the phase and amplitude of neoclassical tearing modes (NTMs), extending the capabilities of the original system. This triggering system determines the phase and amplitude of a given NTM using magnetic coils at different tor…
PublishedM. Gherendi V. L. Zoita T. Craciunescu M. Gatu Johnson A. Pantea et al.
The neutron field parameters (fluence and energy distribution) at a specific location outside the JET Torus Hall have been measured by means of super-heated fluid detectors (or “bubble detectors”) in combination with an independent, time-of-flight, technique. The bubble detector assemblies were placed at the end of a vertical line of sight at a…
Published