Molecular-Dynamics Analysis of the Mechanical Behavior of Plasma-Facing Tungsten

A Weerasinghe, E Martinez, BD Wirth… - ACS Applied Materials …, 2023 - ACS Publications
We report a systematic computational analysis of the mechanical behavior of plasma-facing
component (PFC) tungsten focusing on the impact of void and helium (He) bubble defects …

Elastic properties of plasma-exposed tungsten predicted by molecular-dynamics simulations

A Weerasinghe, BD Wirth… - ACS applied materials & …, 2020 - ACS Publications
We report results of systematic molecular-dynamics computations of the elastic properties of
single-crystalline tungsten containing structural defects, voids and overpressurized He …

Helium bubble size effects on the surface morphological response of plasma-facing tungsten

ON Patel, D Dasgupta, BD Wirth… - Materials Research …, 2023 - iopscience.iop.org
We report a simulation study on the effects of helium (He) bubble size on the morphological
evolution and pattern formation on the surface of tungsten used as a plasma-facing …

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 …

[HTML][HTML] Thermal expansion of plasma-exposed tungsten

A Weerasinghe, BD Wirth, D Maroudas - Journal of Applied Physics, 2022 - pubs.aip.org
We report results from a systematic analysis of thermal expansion of plasma-exposed
tungsten based on molecular-dynamics simulations using models of tungsten with …

Atomic-scale modeling toward enabling models of surface nanostructure formation in plasma-facing materials

D Maroudas, BD Wirth - Current Opinion in Chemical Engineering, 2019 - Elsevier
Designing plasma-facing components (PFCs) that can tolerate the extreme heat and particle
flux exposure conditions inside a fusion reactor core is one of the major obstacles toward the …

[HTML][HTML] Hole formation effect on surface morphological response of plasma-facing tungsten

CS Chen, D Dasgupta, BD Wirth… - Journal of Applied …, 2021 - pubs.aip.org
We report simulation results on the effect of helium (He) bubble bursting-mediated surface
hole formation on the surface morphological response of tungsten plasma-facing …

Onset of fuzz formation in plasma-facing tungsten as a surface morphological instability

CS Chen, D Dasgupta, RD Kolasinski, BD Wirth… - Physical Review …, 2021 - APS
Based on simulation results and theoretical analysis according to an atomistically informed
continuum-scale model for the surface morphological response of tungsten plasma-facing …

The mobility of small vacancy/helium complexes in tungsten and its impact on retention in fusion-relevant conditions

D Perez, L Sandoval, S Blondel, BD Wirth… - Scientific reports, 2017 - nature.com
Tungsten is a promising plasma facing material for fusion reactors. Despite many favorable
properties, helium ions incoming from the plasma are known to dramatically affect the …

Synergy of plastic deformation and gas retention in tungsten

D Terentyev, G De Temmerman, B Minov… - Nuclear …, 2014 - iopscience.iop.org
Taking the example of tungsten, we demonstrate that high-flux plasma exposure of
recrystallized and plastically deformed samples leads to principal differences in the gas …