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An Overview of Recent Standard and Accelerated Molecular Dynamics Simulations of Helium Behavior in Tungsten

机译:钨中氦行为的最新标准和加速分子动力学模拟综述

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摘要

One of the most critical challenges for the successful adoption of nuclear fusion power corresponds to plasma-facing materials. Due to its favorable properties in this context (low sputtering yield, high thermal conductivity, high melting point, among others), tungsten is a leading candidate material. Nevertheless, tungsten is affected by the plasma and fusion byproducts. Irradiation by helium nuclei, in particular, strongly modifies the surface structure by a synergy of processes, whose origin is the nucleation and growth of helium bubbles. In this review, we present recent advances in the understanding of helium effects in tungsten from a simulational approach based on accelerated molecular dynamics, which emphasizes the use of realistic parameters, as are expected in experimental and operational fusion power conditions.
机译:成功采用核聚变动力所面临的最关键挑战之一是面对等离子体的材料。由于在此方面的有利性能(低溅射率,高导热率,高熔点等),钨是主要的候选材料。然而,钨受到等离子体和聚变副产物的影响。尤其是氦原子核的辐射通过过程的协同作用强烈地改变了表面结构,其起源是氦气泡的成核和生长。在这篇综述中,我们通过基于加速分子动力学的模拟方法,介绍了对钨中氦气效应的理解的最新进展,该方法强调了实际参数的使用,如在实验和操作聚变条件下所期望的那样。

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