Deduction of SOL transport coefficients using 2D modelling for hot-ion ELM-free H-modes in JET

Profiles of T-e and J(sat) measured by Langmuir probes at the target plates of the JET Mkl divertor and the target plate power loading are modelled via the EDGE2D/NIMBUS codes. The low-density ((n) over bar(e) similar to 1 x 10(19) m(-3)) OH plasma preceding high-power NBI, as well as the ELM-free high performance H* and high performance rollover H-RO phases are considered. Experimentally, the power splitting between ions (P-i greater than or equal to 7 MW) and electrons (P-e < 1 MW) in conjunction with the H-mode transport barrier effects that T-e and J(sat) change little from OH to H* conditions, although P-in similar to 2 --> 20 MW and (n) over bar(e) can increase up to a factor of three as the H*-phase progresses. Tn modelling, chi(i) is taken as 1 m(2)/s. To match the divertor T-e-profiles, chi(e) must be varied from the strike point outwards as similar to 0.5 --> 3 m(2)/s in all phases. Perpendicular particle transport is assumed to be purely diffusive or with a pinch. Duplication of J(sat)(R) requires: D-perpendicular to similar to 0.03 --> 0.015 m(2)/s (OH --> H*), or upsilon(pinch)/D-perpendicular to similar to 15 --> 45 --> 25 m(-1) (OH --> H* --> H-RO) with D-perpendicular to = 0.1 m(2)/S. Sensitivity studies involving different recycling scenarios, deep and shallow computational grids, wall material and the thermal transport barrier are carried out to judge the possible influences on the deduced transport coefficients.