Investigation on radial transport of perpendicular momentum in the SOL of AUG during L-I-H transition

Transport in the edge and scrape-off layer (SOL) region of magnetically confined plasmas is dominantly turbulent, caused by strong events in the form of filamentary structures that originate from the outboard midplane and are elongated along the magnetic field [1]. In addition to particles and energy also momentum is transported radially by turbulence. We have investigated the radial transport of momentum perpendicular to the total magnetic field (Btotal) in the SOL of ASDEX Upgrade during L-mode (Fig.1), using the Innsbruck-Padova probe head (Fig.2). The radial transport of perpendicular momentum (Mr) has been estimated using electric fields derived from the potential difference of floating pins and the plasma density estimated from the ion saturation current of negatively biased pin.