| Author(s) |
Umang Agarwal, Erki Metsanurk, Zhijiang Chen, Cameron J.R. Duncan, Robert J England, Mungo Frost, Nicholas J Hartley, Megan Ikeya, Fuhao Ji, Dominik Christian Kaczmarek, Benjamin K Ofori-Okai, Silvia Pandolfi, Alexander H. Reid , Xiaozhe Shen, Eric Sung, Peihao Sun, Klaus Sokolowski-Tinten, Ling Wang, Xijie Wang, Yongqiang Wang, Katie Kelly Wootten, Siegfried Glenzer, Alfredo A. Correa, Artur Tamm, Mianzhen Mo |
| Abstract Scope |
W and W-Re alloys are candidate plasma facing materials for future fusion reactors. Despite of intensive studies, some knowledge gaps still exist, particularly on the effects of irradiation defects (such as neutron transmutation products including solid Os elements and He bubbles) on structural and thermal properties. We previously used the ultrafast electron diffuse scattering (UEDS) technique to study nonequilibrium phonon dynamics in femtosecond laser-excited W, the result of which allowed to validate molecular dynamics simulations [Mo et al., Sci. Adv. 10, eadk9051 (2024)]. Here, we first report a follow-up UEDS study on W implanted with He. The results show that He effects considerably renormalize the phonon-phonon scattering dynamics in W, leading to a reduction in lattice thermal conductivity. More recently, we have also measured W-Re and W-Re-Os alloys using the same technique, and the results will be presented in this talk.
Supported by DOE FES FWP #101242, SLAC LDRD |