Journals

Showing 1 - 10 of 29 Journals Results
2020
UKAEA-CCFE-PR(20)88

The efficient confinement of fast ions is crucial to the development of a fusion power plant. Sawtooth crashes are a manifestation of an internal kink instability, which can severely degrade this confinement. The effect of these on a fast ion population can be investigated using fast-ion deuterium-alpha (FIDA) spectroscopy, where charge exchange re…

Preprint
2020
UKAEA-CCFE-PR(20)11

The galling behaviour of 316L stainless steel was investigated in both the unoxidised and oxidised states, after exposure in simulated PWR water for 850 hours. Galling testing was performed according to ASTM G196 in ambient conditions. 316L was found to gall by the wedge growth and flow mechanism in both conditions. This resulted in folds ahead of …

Preprint Purchase
2020
UKAEA-CCFE-PR(20)01

Proton irradiation is often used as a proxy for neutron irradiation but the irradiated layer is typically <50 mm deep; this presents a problem when trying to obtain mechanical test data as a function of irradiation level. Two novel methodologies have been developed to record stress-strain curves for thin proton-irradiated surface layers of SA-50…

Preprint Published
2019
UKAEA-CCFE-PR(19)77

Internal flow behaviour during melt-pool-based metal manufacturing remains unclear and hinders progression to process optimisation. In this contribution, we present direct time-resolved imaging of melt pool flow dynamics from a high-energy synchrotron radiation experiment. We track internal flow streams during arc welding of steel and measure insta…

Preprint Published
2019
UKAEA-CCFE-PR(19)42

High temperature, neutron irradiated single crystal tungsten, with a post irradiation composition of W-1.20±0.11at.%Re-0.11±0.05at.%Os-0.03±0.01at.%Ta was characterised using a combination of Atom Probe Tomography (APT) and Scanning Transmission Electron Microscopy (STEM). APT showed that within nanoscale clusters of Re/Os, the atomic density wa…

Preprint
2019
UKAEA-CCFE-PR(19)27

This report covers the initial progress on the development of material property handbook (MPH) of baseline CuCrZr, within the Materials Engineering Data and Design Integration (MAT-EDDI) of EUROfusion Material Database and Handbook group. Initial drafting of the baseline CuCrZr MPH structure is presented, with inclusion of available data, figures a…

Preprint Purchase
The published version of this paper is currently under embargo and will be available on 01/07/2021
2019
UKAEA-CCFE-PR(19)13

Multiple space and time scales arise in plasma turbulence in magnetic confinement fusion devices because of the smallness of the square root of the electron-to-ion mass ratio (me/mi)1/2 and the consequent disparity of the ion and electron thermal gyroradii and thermal speeds. Direct simulations of this turbulence that include both…

Preprint Published
2019
UKAEA-CCFE-PR(19)05

HALO (HAgis LOcust) solves the initial value Vlasov-Maxwell problem perturbatively for application to certain nonlinear wave-particle problems in tokamak plasmas. It uses the same basic approach as the HAGIS code (Pinches et al., 1998) for wave evolution but is built on the LOCUST-GPU full-orbit code (Akers et al., 2012) for the solution of the Ham…

Preprint
2018
UKAEA-CCFE-PR(18)63

The current paper reports the work of the EUROfusion Material Database and Handbook group within the MAT-EDDI (Materials – Engineering Data and Design Integration) subproject of the EUROfusion consortium. A special emphasis is put on the building of the EUROfusion RAFM steel database accounting around 3000 raw materials data records. A data revie…

Preprint Purchase
The published version of this paper is currently under embargo and will be available on 14/07/2020