[HTML][HTML] Perspectives on multiscale modelling and experiments to accelerate materials development for fusion

MR Gilbert, K Arakawa, Z Bergstrom, MJ Caturla… - Journal of Nuclear …, 2021 - Elsevier
Prediction of material performance in fusion reactor environments relies on computational
modelling, and will continue to do so until the first generation of fusion power plants come on …

Helium, hydrogen, and fuzz in plasma-facing materials

KD Hammond - Materials Research Express, 2017 - iopscience.iop.org
Tungsten, the primary material under consideration as the divertor material in magnetic-
confinement nuclear fusion reactors, has been known for the last decade to form'fuzz'—a …

Large-scale atomistic simulations of low-energy helium implantation into tungsten single crystals

KD Hammond, S Blondel, L Hu, D Maroudas, BD Wirth - Acta Materialia, 2018 - Elsevier
Large-scale molecular dynamics simulations of post-implantation helium behavior in plasma-
facing tungsten single crystals reveal orientation-dependent depth profiles, surface evolution …

Competing kinetics and He bubble morphology in W

L Sandoval, D Perez, BP Uberuaga, AF Voter - Physical review letters, 2015 - APS
The growth process of He bubbles in W is investigated using molecular dynamics and
parallel replica dynamics for growth rates spanning 6 orders of magnitude. Fast and slow …

On the origin of 'fuzz'formation in plasma-facing materials

D Dasgupta, RD Kolasinski, RW Friddle, L Du… - Nuclear …, 2019 - iopscience.iop.org
Tungsten, the material used in the plasma-facing components (PFCs) of nuclear fusion
reactors, develops a fuzz-like surface morphology under typical reactor operating conditions …

Crystal orientation effects on helium ion depth distributions and adatom formation processes in plasma-facing tungsten

KD Hammond, BD Wirth - Journal of applied physics, 2014 - pubs.aip.org
We present atomistic simulations that show the effect of surface orientation on helium depth
distributions and surface feature formation as a result of low-energy helium plasma …

Dynamics of small mobile helium clusters near tungsten surfaces

L Hu, KD Hammond, BD Wirth, D Maroudas - Surface science, 2014 - Elsevier
We report the results of a systematic atomic-scale analysis of the dynamics of small mobile
helium clusters in tungsten, near tungsten surfaces. These helium clusters are attracted to …

Interactions of mobile helium clusters with surfaces and grain boundaries of plasma-exposed tungsten

L Hu, KD Hammond, BD Wirth… - Journal of Applied Physics, 2014 - pubs.aip.org
We report results of atomistic computations for the interactions of small mobile helium
clusters (Hen) with free surfaces and grain boundaries (GBs) in tungsten toward …

[HTML][HTML] Helium aggregation and surface morphology near grain boundaries in plasma-facing tungsten

KD Hammond, D Maroudas, BD Wirth - Journal of Applied Physics, 2024 - pubs.aip.org
We conduct molecular dynamics simulations of helium in tungsten to study the interaction of
helium with grain boundaries. Model systems with grain boundary planes perpendicular to …

Helium flux effects on bubble growth and surface morphology in plasma-facing tungsten from large-scale molecular dynamics simulations

KD Hammond, IV Naeger, W Widanagamaachchi… - Nuclear …, 2019 - iopscience.iop.org
We investigate helium flux effects on helium transport and surface evolution in plasma-
facing tungsten using molecular dynamics. The simulations span two orders of magnitude …