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© 2018

Helium Nano-bubble Formation in Tungsten

Measurement with Grazing-Incidence Small Angle X-ray Scattering

Book

Part of the Springer Theses book series (Springer Theses)

Table of contents

  1. Front Matter
    Pages i-xvii
  2. Matt Thompson
    Pages 1-21
  3. Matt Thompson
    Pages 53-65
  4. Matt Thompson
    Pages 67-76
  5. Matt Thompson
    Pages 107-112

About this book

Introduction

This PhD thesis characterises the damage that occurs in tungsten when it is exposed to a fusion-like environment. The book presents pioneering work on the use of grazing-incidence small-angle X-ray scattering (GISAXS) to measure nano-bubble formation in tungsten exposed to helium plasma. The phenomenon of nanoscale bubble formation within metals during helium plasma exposure can lead to undesirable changes in the material properties, such as complex nanoscale surface modification or a reduction in thermal conductivity. As a result of this work, it is now possible to quantify how nanobubble behaviour changes within different materials, and under different plasma conditions.
 
In 2015 the author published the first GISAXS study of helium-induced nanobubble formation in tungsten, demonstrating the viability of using GISAXS for this work. This paper has generated significant interest from the international fusion community and was selected as one of the highlights for the journal Nuclear Fusion.

Keywords

Grazing Incidence Small Angle X-Ray Scattering Fusion Materials Helium Nanobubble Formation Plasma Modification of Tungsten Plasma-material Interactions

Authors and affiliations

  1. 1.Research School of Physics and EngineeringAustralian National UniversityCanberraAustralia

About the authors

Matt Thompson was awarded his PhD in 2017 from the Australian National University (ANU), after developing new methods of using grazing incidence small angle X-ray scattering (GISAXS) to measure plasma-induced modification in fusion materials. Since then he has continued to work for the ANU developing more precise Monte-Carlo based methods to fit GISAXS data, including a fitting package that will be released to the general public in 2019. His research now includes investigation plasma modification of other materials in order to better understand how and why particular nanostructures form, and to develop reproducible nanofabrication techniques for future commercialisation.

Bibliographic information