TY - JOUR
T1 - GISAXS modelling of helium-induced nano-bubble formation in tungsten and comparison with TEM
AU - Thompson, Matt
AU - Sakamoto, Ryuichi
AU - Bernard, Elodie
AU - Kirby, Nigel
AU - Kluth, Patrick
AU - Riley, Daniel
AU - Corr, Cormac
N1 - Publisher Copyright:
Copyright © 2016 Published by Elsevier B.V. All rights reserved.
PY - 2016/5/1
Y1 - 2016/5/1
N2 - Grazing-incidence small angle X-ray scattering (GISAXS) is a powerful non-destructive technique for the measurement of nano-bubble formation in tungsten under helium plasma exposure. Here, we present a comparative study between transmission electron microscopy (TEM) and GISAXS measurements of nano-bubble formation in tungsten exposed to helium plasma in the Large Helical Device (LHD) fusion experiment. Both techniques are in excellent agreement, suggesting that nano-bubbles range from spheroidal to ellipsoidal, displaying exponential diameter distributions with mean diameters μ=0.68 ± 0.04 nm and μ=0.6 ± 0.1 nm measured by TEM and GISAXS respectively. Depth distributions were also computed, with calculated exponential depth distributions with mean depths of 8.4 ± 0.5 nm and 9.1 ± 0.4 nm for TEM and GISAXS. In GISAXS modelling, spheroidal particles were fitted with an aspect ratio ε=0.7 ± 0.1. The GISAXS model used is described in detail.
AB - Grazing-incidence small angle X-ray scattering (GISAXS) is a powerful non-destructive technique for the measurement of nano-bubble formation in tungsten under helium plasma exposure. Here, we present a comparative study between transmission electron microscopy (TEM) and GISAXS measurements of nano-bubble formation in tungsten exposed to helium plasma in the Large Helical Device (LHD) fusion experiment. Both techniques are in excellent agreement, suggesting that nano-bubbles range from spheroidal to ellipsoidal, displaying exponential diameter distributions with mean diameters μ=0.68 ± 0.04 nm and μ=0.6 ± 0.1 nm measured by TEM and GISAXS respectively. Depth distributions were also computed, with calculated exponential depth distributions with mean depths of 8.4 ± 0.5 nm and 9.1 ± 0.4 nm for TEM and GISAXS. In GISAXS modelling, spheroidal particles were fitted with an aspect ratio ε=0.7 ± 0.1. The GISAXS model used is described in detail.
UR - http://www.scopus.com/inward/record.url?scp=84959340492&partnerID=8YFLogxK
U2 - 10.1016/j.jnucmat.2016.01.038
DO - 10.1016/j.jnucmat.2016.01.038
M3 - Article
SN - 0022-3115
VL - 473
SP - 6
EP - 12
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
ER -