M. Fitzgerald R. Dumont D. Keeling J. Mailloux S. Sharapov M. Dreval A. Figueiredo R. Coelho J. Ferreira P. Rodrigues F. Nabais D. Borba Ž. Štancar G. Szepesi R.A. Tinguely P.G. Puglia H.J.C. Oliver V. Kiptily M. Baruzzo M. Lennholm P. Siren J. Garcia C.F. Maggi
A Toroidal Alfven eigenmode (TAE) has been observed to be driven by alpha particles in a JET deuterium-tritium internal transport barrier plasma. The observation occurred 50ms after the removal of neutral beam heating (NBI). The mode is observed on magnetics, soft-xray, interferometry and reflectometry measurements. We present detailed stability…
PreprintM Maslov E. Lerche F. Auriemma C.D. Challis A. Chomiczewska A. Dal Molin J. Eriksson J. Garcia J. Hobirk I. Ivanova-Staknik Ph. Jacquet A. Kappatou Y. Kazakov D. Keeling D.B. King V. Kiptily K. Kirov D. Kos R. Lorenzini E. De La Luna C.F. Maggi J. Mailloux P. Mantica M. Marin G. Matthews I. Monakhov M. Nocente G Pucella D. Rigamonti F. Rimini S. Saarelma Z. Stancar H. Sun M. Tardocchi D. Van Eester JET contributors
In JET deuterium-tritium (D-T) plasmas, the fusion power is produced through thermonuclear reactions and reactions between thermal ions and fast particles generated by neutral beam injection (NBI) heating or accelerated by electromagnetic wave heating in the ion cyclotron range of frequencies (ICRF). To complement the experiments with 50/50 D/T …
PreprintR. W. Eardley A. J. Dubas A. Davis
While substantial research effort has been made recently in the development of computational liquid-metal magnetohydrodynamics (MHD) solvers, this has typically been confined to closed-source and commercial codes. This work aimed to investigate some open-source alternatives. Two OpenFOAM-based MHD solvers, mhdFoam and epotFoam, were found to sho…
PreprintM. Boleininger S. L. Dudarev D. R. Mason E. Martínez
We derive a simple analytical line integral expression for the relaxation volume tensor of an arbitrary interconnected dislocation network. This quantity determines the magnitude of dislocation contribution to the dimensional changes and volumetric swelling of a material, and highlights the fundamental dual role of dislocations as sources of intern…
Preprint PublishedK. Verhaegh B. Lipschultz J.R. Harrison F. Federici D. Moulton N. Lonigro M. O'Mullane N. Osborne P. Ryan T. Wijkamp B. Kool C. Theiler A. Thornton
First quantitative analysis of the detachment processes in the MAST Upgrade Super-X divertor show an unprecedented impact of plasma-molecular interactions involving molecular ions, resulting in strong ion sinks, leading to a reduction of ion target flux. This starts to occur as the ionisation source detaches from the target, leading to a build-up o…
PreprintR. Thomas D. Bowden D. Lunt D. Stewart M. Preuss
Hard-facing alloys in nuclear applications must remain resistant to deformation and wear, whilst also minimising transmutation to problematic elements during service. To this end, the Fe-based alloy RR2450 has been developed to potentially replace Co-based hard-facing alloys. RR2450 is a complex multi-phase stainless steel alloy showing an unusuall…
PreprintR. Thomas Ö. Koç T. Ungar G. Zilahi H. Xu Z. Hegedues U. Lienert G. Ribarik H. Sharma P. Kenesei M. Preuss P. Frankel
During operation, structural components made of zirconium alloys are subject to neutron irradiation, which leads to the displacement of zirconium atoms from their lattice sites, the production of self-interstitials and vacancies, and eventually dislocation loops. This process can lead to deleterious effects such as irradiation growth, creep and …
PreprintAlexey Mishchenko Daniel Kennedy Per Helander Axel Konies Gabriel Plunk Pavlos Xanthopoulos Alessandro Zocco
In this paper, we summarize our recent work on gyrokinetic applications in electron- positron and non-neutral plasma. The electrostatic stability of electron-positron plasmas was investigated in dipole and slab geometry, with and without ion admixture. The gyrokinetic dispersion relation was derived and, for the slab case, extended to non-neutra…
PreprintPaul Wrigley Paul Wood Sam O'Neill Daniel Robertson Richard Hall Jason Joannou
New Technologies such as High Temperature Superconducting magnets and advanced computing in Fusion Reactors, Advanced Generation IV Reactor Technologies or Off-Site Modular Construction are exciting developments in low carbon energy. Modular Reactors enable “factory shop build and transport to site” according to the International Atomic Ener…
PreprintJ. Northall M. Darby A. Cooper A. Hollingsworth A. Wohlers Y. Zayachuk
Erbium hydrides are suitable materials for the long-term storage of hydrogen and this work details the first reported instance of erbium deuteride synthesis via ion beam implantation. This method offers an alternative loading methodology to conventional gas loading with several advantages and these are discussed within. The work also briefly dis…
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