Daniel Padrão David Hancock James Paterson Frank Schoofs Christopher Tuck Ian Maskery
Heat sinks have manifold applications, from micro-electronics to nuclear fusion reactors. Their performance expectations will continue to increase in line with the power consumption and miniaturisation of technology. Additive manufacturing enables the creation of novel, compact heat sinks with greater surface-to-volume ratios and geometrical comple…
Preprint PublishedT. Gheorghiu F. Militello J. Juul Rasmussen
Shear flows in turbulent fluids have been known to act as transport barriers for some time. An example of a shear flow generating mechanism is the E×B shear in plasma, which has a substantial impact on the dynamics of magnetic confinement fusion devices. The influence of this may be seen in the scrape-off layer (SOL) where blobs or filaments may b…
Preprint PublishedD. Lunt R. Thomas D. Bowden M. T. P. Rigby-Bell S. de Moraes Shubeita C. Andrews T. Lapauw J. Vleugels J. Quinta da Fonseca K. Lambrinou P. Frankel
Materials subjected to irradiation damage often undergo local changes in the microstructure that effect the expected performance. To investigate those changes, this work proposes a novel approach to detect strain localisation caused by irradiation-induced damage in nuclear materials on the microstructural level, conside…
PublishedE. J. Muttio W. G. Dettmera J. Clarke D. Peric Z. Ren L. Fletcher
A Supervised Parallel Optimisation (SPO) is presented. The proposed framework couples different optimisation algorithms to solve single-objective optimisation problems. The supervision balances the exploration and exploitation capabilities of the distinct optimisers included, providing a general framework to solve problems with diverse character…
PreprintH. J. C. Oliver S. E. Sharapov Z. Stancar M. Fitzgerald E. Tholerus B. N. Breizman M. Dreval J. Ferreira A. Figueiredo J. Garcia N. Hawkes D. L. Keeling P. G. Puglia P. Rodrigues A. Tinguely JET contributors
The Joint European Torus (JET) recently carried out an experimental campaign using a plasma consisting of both deuterium (D) and tritium (T). We observed a high-frequency mode using a reflectometer and an interferometer in a DT plasma heated with low power neutral beam injection, $P_{NBI} = 11.6$ $MW$. This mode were observed at a frequency $f =…
PreprintV.G. Kiptily P.J. Bonofiglo T. Craciunescu J. Eriksson M. Fitzgerald V. Goloborodko M. Nocente S. Menmuir M. Podestà M. Poradzinski D. Rigamonti Z. Stancar S.E. Sharapov H. Sun D.M. Taylor M. Tardocchi P. Beaumont F. Belli F.E. Cecil C.D. Challis R. Coelho M. Curuia R. Dumont J. Garcia M. Garcia-Munoz Z. Ghani Ye. Kazakov D. Keeling E. Lerche C.F. Maggi J. Mailloux P. Mantica M.J. Mantsinen D. Marocco C. Perez von Thun F. Rimini
The fusion reaction between deuterium and tritium, D(T,n)4He is the main source of energy in future thermonuclear reactors. Charged fusion products of this reaction, α-particles (4He-ions), are born with an average energy of 3.5 MeV. Transferring energy to the thermal plasma during their slowing down, the…
PreprintK. Kirov C. Challis E. De la Luna J. Eriksson D. Gallart J. Garcia M. Gorelenkova J. Hobirk P. Jacquet A. Kappatou Y. Kazakov D. Keeling D. King E. Lerche C. Maggi J. Mailloux P. Mantica M. Mantsinen M. Maslov S. Menmuir P. Siren Z. Stancar D. Van Eester JET Contributors
This work studies the interaction between Radio Frequency (RF) waves used for Ion Cyclotron Resonance Heating (ICRH) and the fast D and T Neutral Beam Injected (NBI) ions in DT plasma. The focus is on the effect of this interaction, also referred to as synergistic effects, on the fusion performance in the recent JET DTE2 campaign. Experimental d…
PreprintM. Anderton C. Baus T. P. Davis R. Pearson K. Mukai J. Pollard K. Taylor S. Kirk J. Hagues
Tritium self-sufficiency is one of the fundamental challenges for deuterium-tritium nuclear fusion reactors. The combination of key high temperature radiation shielding materials that possess dense, high neutron absorption cross-section, and moderation properties, and tritium breeding materials could involve interesting design spaces for the centra…
PreprintE. Parr K. G. McClements W. W. Heidbrink C. Michael G. Prechel J. Rivero-Rodriguez
A method for determining the fast-ion population density in magnetically-confined plasmas as a function of radius-pitch values, (R, Lambda), using ssNPA-signal and NBI power-output data has been developed. Oscillations in the NBI power output are replicated only in the active part of the ssNPA signal, allowing this to be separated…
PreprintChris Brown Hanni Lux James Cowan
Developments in fusion energy technology and the aspiration to build and run commercial fusion energy power plants has seen the commencement of numerous publicly and privately funded projects in recent years. Megaprojects, like fusion power plants, by their very nature are inherently complex and risky, therefore providing a robust cost estimate in …
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