Derivation of a scaling law for n$_{sep}$/n$_{ped}$ as a function of engineering parameters in JET H-mode plasma and impact of divertor geometry

International audience ; A viable magnetic fusion power plant has to combine very high plasma density and temperature inthe core region, in order to maximize fusion reactions, with cold plasma conditions in the peripheral regioncompatible with long life expectancy of plasma-facing components• RT01: Core-Edge-SOL integrated H-mode scenario compatible with exhaust constraints insupport of ITER• To investigate « core-edge » compatibility we look at the pedestal and SOL regions for alarge set of experimental data on H-mode plasmas from JET tokamak and in particular to theratio nsep/nped where• nsep is the separatrix density at the outer midplane• nped is top pedestal density at the outer midplane• The aim is to derive a scaling law of this ratio as a function of engineering parameters• This work was inspired from what have been done in DIIID (T Leonard et al, NF 2017)