H. J. Campbell F. Schoofs A. Reilly
Rare earth barium copper oxides (REBCO) are a particular class of cuprate high temperature superconductor. The favourable properties of REBCO coated conductor tapes (CCTs) and the well-established production methods have brought these tapes to the forefront of tokamak fusion research, showing a lot of promise for the development of powerful, high f…
PreprintAlice Cryer Alfie Sargent Fumiaki Abe Paul Dominick Baniqued Ipek Caliskanelli Hasan Kivrak Hanlin Niu Salvador Pacheco-Gutierrez Alexandros Plianos Masaki Sakamoto Tomoki Sakaue Wataru Sato Shu Shirai Yoshimasa Sugawara Harun Tugal Myles Verdon Andika Yudha Robert Skilton
The maturation of Virtual Reality software introduces new avenues of nuclear decommissioning research. Digital Mockups are an emerging technology which provide a virtual representation of the environment, objects or processes, supporting the whole lifecycle of product development and operations. This paper provides a survey on currently available …
PreprintA. I. Blair D. P. Hampshire
We investigate the in-field critical current density Jc(B) of superconducting-normal-superconducting (SNS) Josephson junctions (JJs) and polycrystalline superconducting systems with grain boundaries modeled as Josephson-type planar defects, both analytically and through computational time-dependent Ginzburg-Landau (TDGL) simulations in two and thre…
Preprint PublishedChris Hardie Rhys Thomas Yang Liu Philipp Frankel Fionn Dunne
Classical crystal plasticity formulation based on dislocation slip was extended to include the mechanisms of dislocation channelling, with associated strain softening which is observed in many alloys post irradiation. The performance of the model was evaluated against experimental data on Zircaloy-4, which included engineering stress-strain respons…
Preprint PublishedPui-Wai Ma T.-H. Hubert Chan
We have devised a new type of feedforward neural network. It is equivariant with respect to unitary operators U(n). The input and output can be vectors in Cn with arbitrary dimension n. No convolution layer is required in our implementation, and we also avoid errors due to truncated higher order terms …
PreprintY. Zayachuk I. Jepu M. Zlobinski C. Porosnicu N. Catarino E. Pajuste P. Petersson L. Dittrich J. P. Coad E. Grigore C. Postolache E. Alves G. Kizane M. Rubel A. Widdowson
This work was carried out to identify sources of errors, uncertainties and discrepancies in studies of fuel retention in wall components from the JET tokamak using methods based on thermal desorption. The parallel aim was to establish good practices in measurements and to unify procedures in data handling. A comprehensive program designed for deute…
PreprintK. Pentland M. Tamborrino T. J. Sullivan J. Buchanan L. C. Appel
Sequential numerical methods for integrating initial value problems (IVPs) can be prohibitively expensive when high numerical accuracy is required over the entire interval of integration. One remedy is to integrate in a parallel fashion, “predicting” the solution serially using a cheap (coarse) solver and “correcting” these values using an …
PreprintS. H. Ward R. Akers S. D. Pinches A. Loarte R. G. L. Vann M. A. Van Zeeland L. Li Y. Liu A. Polevoi
The LOCUST GPU code has been applied to study the fast-ion transport caused by resonant magnetic perturbations in the high-performance Q = 10 ITER baseline scenario. The computational speed of the code is used calculate the impact of the ITER ELM-control-coil system on neutral beam heating efficiency, as well as producing detailed predictions o…
Preprint PublishedAnder Gray Scott Ferson Edoardo Patelli
Elementary formulas for propagating information about means and variances through mathematical expressions have long been used by analysts. Yet the precise implications of such information are rarely articulated. This paper explores distribution-free techniques for risk analysis that do not require simulation, sampling or approximation of any kind.…
Preprint Published