Morphological and nanomechanical changes in tungsten in high heat flux conditions

M Seo, JR Echols, AL Winfrey - Npj Materials Degradation, 2020 - nature.com
Morphological and nanomechanical alteration of tungsten in extreme environments, like
those in edge localized modes in nuclear fusion environments, up to 46.3 GWm− 2 heat …

[HTML][HTML] Microstructural modification of highly porous resolidified tungsten in heat flux of 46.3 GW/m2 and focused ion beam

M Seo, AL Winfrey - Fusion Engineering and Design, 2024 - Elsevier
Tungsten is a promising material for the plasma-facing components of nuclear fusion
reactors due to its resistance to heat flux and plasma influence. However, a transient heating …

[HTML][HTML] Microstructure deformation and near-pore environment of resolidified tungsten in high heat flux conditions

M Seo, K Wang, JR Echols, AL Winfrey - Journal of Nuclear Materials, 2022 - Elsevier
Tungsten is a candidate divertor material for many tokamak reactors and has potential to be
durable to high heat flux conditions. However, plasma-materials interaction and edge …

[HTML][HTML] The influence of different isochronal annealing temperature on helium ion irradiation damage of W-Nb composites

HY Chen, YF Zhou, MY Xu, LM Luo, Q Xu… - Fusion Engineering and …, 2020 - Elsevier
Considering that the plasma-facing materials (PFMs) would be affected by helium ion
irradiation, the influence of isochronal annealing at different temperatures on the irradiation …

Observations on Macroscopic Surface Modification and Oxidation of Tungsten and Tungsten Carbide in Laser Focus in Air

M Seo, S Yu, V Gopalan, AL Winfrey - Fusion Science and …, 2024 - Taylor & Francis
Tungsten and tungsten carbide were damaged in ambient air with varying incident angles
(0, 30, 45, and 60 deg) for approximately 5000 shots. The goal of these experiments was to …

Modeling of Thrust Properties for Capillary-Type Pulsed Plasma Thrusters Using Electrothermal Discharge in Teflon

MMA El-Hadeed, MA Bourham… - IEEE Transactions on …, 2024 - ieeexplore.ieee.org
Pulsed plasma thrusters (PPTs) are preferred low-power systems for satellites because of
their simplicity and small dimensions. This article was carried out to discuss and calculate …

A repetitive high current pulse generator for high flux electrothermal plasma jets

L Chen, X Li, B Zhang, W Yang, S Jiang… - Review of Scientific …, 2020 - pubs.aip.org
Power sources play an important role in the characteristics and the applications of the
electrothermal (ET) plasma as an edge localized mode (ELM) heat flux simulator. A …

[HTML][HTML] Flow characteristics and charge exchange effects in a two-dimensional model of electrothermal plasma discharges

MJ Esmond, AL Winfrey - Journal of Fusion Energy, 2016 - Springer
Electrothermal (ET) plasma discharges are capillary discharges that ablate liner materials
and form partially ionized plasma. ET plasma discharges are generated by driving current …

[HTML][HTML] Scaling Laws of Bulk Plasma Parameters for a 1-D Flow through a Capillary with Extended Converging–Diverging Nozzle for Simulated Expansion into …

R Majumdar, JG Gilligan, AL Winfrey… - Journal of Fusion …, 2015 - Springer
A capillary-extended converging–diverging transition region was previously proposed to
allow for the flow and expansion of plasma into a large volume simulating aerosol …

Simulation of erosion and redeposition of plasma facing materials under transient plasma instabilities

NM Almousa, M Bourham - IEEE Transactions on Plasma …, 2020 - ieeexplore.ieee.org
Deposition of plasma energy during off-normal fusion reactor operational events delivers a
transient heat flux of up to 100 MJ/m 2 to the plasma-facing materials (PFMs). Understanding …