Effect of lithium vapour shielding on hydrogen plasma parameters

TitleEffect of lithium vapour shielding on hydrogen plasma parameters
Publication TypeJournal Article
Year of Publication2021
AuthorsF. Romano, P. Rindt, J. Scholten, Y. Hayashi, T.W. Morgan
JournalPhysica Scripta
Volume96
Issue12
Pagination125626
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 the wall, but it has not been possible to directly determine the effects of Li vapour on the plasma parameters. Experiments to investigate this were carried out in Magnum-PSI, which is able to generate a plasma with DEMO-divertor relevant conditions. 3D printed tungsten capillary porous structures filled with Li have been used as targets. A reciprocating Langmuir probe was used to determine electron temperature and density close to the target, while the power reduction to the coolant due to vapour shielding was increased from 0% to 50%. The Langmuir probe measurements directly determined an increase of density by up to 50% while electron temperature could be inferred to have dropped by up to 33% compared to the solid target reference case.

DOI10.1088/1402-4896/ac2bde
Division

PSI

Department

PMI

PID4cb718fdc55cc57f61a329937a7588d8
Alternate TitlePhys. Scr.
LabelOA
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