Effect of lithium vapour shielding on hydrogen plasma parameters

Abstract A liquid Li vapour-box divertor is an attractive heat exhaust solution for future fusion reactors. Previous works have established the ability of vapour shielding to protect wall, but it has not been possible directly determine effects on plasma parameters. Experiments investigate this were carried out in Magnum-PSI, which able generate a with DEMO-divertor relevant conditions. 3D printed tungsten capillary porous structures filled used as targets. reciprocating Langmuir probe was electron temperature and density close target, while power reduction coolant due increased from 0% 50%. The measurements determined increase by up 50% could be inferred dropped 33% compared solid target reference case.