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Plasma Surface Interactions: Predicting the Performance and Impact of Dynamic PFC Surfaces

Technical Report ·
DOI:https://doi.org/10.2172/2279204· OSTI ID:2279204
 [1]
  1. Univ. of Massachusetts, Amherst, MA (United States); University of Massachusetts Amherst
+ Show Author Affiliations
The objective of this project is to develop, and integrate, high-performance simulation tools capable of predicting plasma-facing component (PFC) operating lifetime and the impact of the evolving surface morphology of tungsten-based PFCs on plasma contamination, including the dynamic recycling of fuel species and tritium retention, in future magnetic fusion devices. Establishing a fundamental physical understanding and developing predictive capabilities of plasma-surface interactions (PSI) requires simultaneously addressing complex and diverse physics occurring over a wide range of length (Angstroms to meters) and time (femtoseconds to years) scales, as well as integrating extensive physical processes across the plasma–surface interface. This requires development of not only detailed physics models and computational strategies at each scale, but also algorithms and methods to couple them effectively in a way that can be robustly validated. Deploying these tools requires the continued development and coupling of leadership-scale computational codes to describe the boundary plasma and the evolving PFC surface, as well as a host of simulations that bridge disparate scales to address complex physical and computational issues at the plasma–surface interface in multi-component materials systems for magnetic fusion energy development beyond ITER.
Research Organization:
Univ. of Massachusetts, Amherst, MA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Fusion Energy Sciences (FES); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR)
Contributing Organization:
Oak Ridge National Laboratory (ORNL); Pacific Northwest National Laboratory (PNNL); Univ. of Tennessee, Knoxville; Clemson Univ.; Univ. of Missouri, Columbia
DOE Contract Number:
SC0018421;
OSTI ID:
2279204
Report Number(s):
DE--SC0018421
Country of Publication:
United States
Language:
English

References (22)

Large-scale atomistic simulations of low-energy helium implantation into tungsten single crystals journal February 2018
Atomic-scale modeling toward enabling models of surface nanostructure formation in plasma-facing materials journal March 2019
Prediction of temperature range for the onset of fuzz formation in helium-plasma-implanted tungsten journal August 2020
Elastic Properties of Plasma-Exposed Tungsten Predicted by Molecular-Dynamics Simulations journal April 2020
Molecular-Dynamics Analysis of the Mechanical Behavior of Plasma-Facing Tungsten journal January 2023
Theoretical Model of Helium Bubble Growth and Density in Plasma-Facing Metals journal February 2020
Equation of state for He bubbles in W and model of He bubble growth and bursting near W{100} surfaces derived from molecular dynamics simulations journal June 2023
Helium segregation and transport behavior near ⟨100⟩ and ⟨110⟩ symmetric tilt grain boundaries in tungsten journal June 2018
Non-dilute helium-related defect interactions in the near-surface region of plasma-exposed tungsten journal October 2020
Hole formation effect on surface morphological response of plasma-facing tungsten journal May 2021
Thermal gradient effect on helium and self-interstitial transport in tungsten journal December 2021
Thermal expansion of plasma-exposed tungsten journal November 2022
Effect of helium flux on near-surface helium accumulation in plasma-exposed tungsten journal November 2021
Helium flux effects on bubble growth and surface morphology in plasma-facing tungsten from large-scale molecular dynamics simulations journal May 2019
On the origin of ‘fuzz’ formation in plasma-facing materials journal July 2019
Corrigendum and Addendum: Helium flux effects on bubble growth and surface morphology in plasma-facing tungsten from large-scale molecular dynamics simulations (2019 Nucl. Fusion 59 066035) journal October 2020
Effects of elastic softening and helium accumulation kinetics on surface morphological evolution of plasma-facing tungsten journal November 2020
Effects of surface vacancy-adatom pair formation on PFC tungsten surface morphological response journal January 2023
Impact of Soret effect on hydrogen and helium retention in PFC tungsten under ELM-like conditions journal June 2023
Helium bubble size effects on the surface morphological response of plasma-facing tungsten journal July 2023
Onset of fuzz formation in plasma-facing tungsten as a surface morphological instability journal November 2021
Strain Effects on the Diffusion Properties of Near-Surface Self-Interstitial Atoms and Adatoms in Tungsten journal July 2021

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Related Subjects

36 MATERIALS SCIENCE
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
97 MATHEMATICS AND COMPUTING
Cluster Dynamics Simulations
Helium Implantation
Molecular-Dynamics Simulations
Molecular-Statics Computations
Multi-scale Modeling and Simulation
Plasma-Facing Components
Plasma-Facing Tungsten
Plasma-related Structural Defects
Plasma-Surface Interactions
Surface Morphological Evolution
Surface Physics