Deuterium and helium behaviour and morphology effects in porous tungsten/liquid lithium plasma facing component system

The focus of this work is to develop a material system that has the favourable bulk properties of W while changing the interface material between the impinging plasma and the structural tungsten. A porous W-liquid metal hybrid system is manufactured and tested for bulk thermomechanical properties as well as plasma surface interactions such as He-induced morphology, vapor shielding and H isotope inventory. Porous W-substrates have been fabricated via SPS and subjected to He and D plasma exposures in both Magnum-PSI and DIONISOS. D inventory in porous W substrates with 1$\mu $m Li deposited and melted is quantified with \textit{in-operando }NRA during 60eV$^{\mathrm{\thinspace }}$D$^{\mathrm{+}}$ plasma exposure to a fluence of 2E24 m$^{\mathrm{-2}}$ with the retention behaviour relative to Li percolation quantified with \textit{in-operando} He ERD as well as \textit{post-mortem }SIMS. Morphology resistance is tested by SEM examination of porous W samples exposed in Magnum-PSI to 1E26m$^{\mathrm{-2}}_{\mathrm{\thinspace }}$D, 5E26m$^{\mathrm{-2\thinspace }}$He, and 5E26m$^{\mathrm{-2}}$ He with 1ms pulses between 0.1-0.5 GW m$^{\mathrm{-2}}$ @ 0.1 Hz, all biased to 33eV and heated to 1000\textdegree C. The effects of porous structure on the implantation and retention of He/D are studied on Magnum-PSI exposed samples with \textit{post-mortem }SIMS.