Behavior of Heavy Metal Ions in FTU Plasmas

The high field, high density tokamak FTU closed its 30-years of operation at the end of 2019. Emissions from the heavy elements Tin, Tungsten and Yttrium have been collected and partially identified in the plasmas of the FTU tokamak with Te between 1 and 3 keV. In the Tin case the study was motivated by experiments on FTU where Tin Liquid Limiter TLL [1] ,was used to mitigate the plasma-wall interactions. In the case of Tungsten, recognized as the best choice for plasma facing components in next generation devices, aim of the work was to extend data availability in the lowintermediate electron temperature range In the case of Yttrium, the study was stimulated by its application to inertial fusion experiments [2].