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UKAEA-CCFE-PR(20)1292018
Typically applied to non-linear simulations of MHD instabilities relevant to magnetically confined fusion, the JOREK code was originally developed with a 2D grid composed of isoparametric bi-cubic Bezier finite elements, that are aligned to the magnetic equilibrium of tokamak plasmas. To improve the applicability of these simulations, the grid-gene…
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UKAEA-RACE-CP(20)032020
Research into remote sensing tools for environmentalmonitoring is an essential aspect for ensuring a healthy anthriving biosphere under the canopy, but also for preventingforest-related hazards from occurring. The challenges associatedwith forestry robotics are posed by the environment itself, asforests are wide-spread areas with a high density …
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UKAEA-CCFE-CP(20)1102020
This paper presents an experimental and numerical study of the effect of specimen thickness on the effective notch toughness Kmatρ for cleavage fracture measured using Single Edge Notch Bend (SENB) specimens containing a Unotch instead of a fatigue pre-crack. These specimens are typically used to measure a material’s effective notch toughness Km…
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UKAEA-CCFE-PR(20)1282019
It has been long hypothesized that the structure of a material bombarded by energetic particles might approach a certain asymptotic steady state in the limit of high exposure to irradiation. There is still no definitive verdict regarding the validity of this hypothesis or the conditions where it applies. To clarify this, we explore a highly simplif…
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UKAEA-CCFE-PR(20)1262020
Martensitic stainless steels have been widely used in industries due to their high strength and good corrosion resistance performance. Precipitation-hardened (PH) martensitic stainless steels are featured by their very high strength compared with other stainless steels, around 3-4 times of the strength of austenitic stainless steels such as 304 and…
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UKAEA-CCFE-CP(20)1082020
In future fusion power plants, such as DEMO, D-T neutron emission is predicted to exceed 1×1021 neutrons/second. Accurately monitoring neutron energies and intensities will be the primary method for estimating fusion power, and calculating key parameters, including the tritium breeding ratio and nuclear heating. The Novel Neutron Det…
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UKAEA-CCFE-PR(20)1192020
Supramolecular chemistry offers an exciting opportunity to assemble materials with molecular precision. However, there remains an unmet need to turn molecular self-assembly into functional materials and devices. Harnessing the inherent properties of both disordered proteins and graphene oxide (GO), we report a disordered protein-GO co-assembling sy…
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UKAEA-RACE-PR(20)012020
The DEMO remote maintenance system (RMS) will have a significant role in keeping the power plant operational, and therefore, would have a large impact on its economic feasibility. The identification of impending mechanical failures of the RMS equipment during active maintenance operations is crucial if unscheduled and or unplanned recovery and resc…
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UKAEA-CCFE-CP(20)1052020
Access to both High Throughput Computing (HTC) and High Performance Computing (HPC) facilities is vitally important to the fusion community, not only for plasma modelling but also for advanced engineering and design, materials research, rendering, uncertainty quantification and advanced data analytics for engineering operations. The computing re…
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UKAEA-CCFE-PR(20)1182020
In this work the mechanisms that can lead to disruptive MHD instabilities in the termination phase of plasma pulses on JET are investigated. It is shown that the broadening or the shrinking of the current density profile, as a consequence of a core hollowing or a edge cooling of the electron temperature profile, can lead to the destabilization o…
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