Spatially resolved H study of hydrogen recycling at a limiter and neutral density profiles obtained with EIRENE in ECRH plasmas of TJ-II

The experiments have been performed in the medium sized stellarator TJ-II, with 200 ms, 400 kW ECRH power producing bean shaped, 20 cm sized plasmas with ne(0) ∀ 0.5 ‐ 1.2 x 10 19 m -3 and T e (0) ∀ 1 ‐ 1.5 keV at the centre and n e (a) = 1.5 x 10 18 m -3 and T e (a) = 40 eV at the