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In inboard-limited plasmas, foreseen to be used in future fusion reactorsstart-up and ramp down phases, the Scrape-Off Layer (SOL) exhibits two regions:the "near" and "far" SOL. The steep radial gradient of the parallel heat fluxassociated with the near SOL can result in excessive thermal loads onto thesolid surfaces, damaging them and/or limiting the operational space of a fusionreactor. In this article, leveraging the results presented in [F. Nespoli etal., Nuclear Fusion 2017], we propose a technique for the mitigation andsuppression of the near SOL heat flux feature by impurity seeding. Firstsuccessful experimental results from the TCV tokamak are presented anddiscussed.

Impurity seeding for suppression of the near Scrape-Off Layer heat flux feature in tokamak limited plasmas