Scalings and plasma profile parameterization of ASDEX high density Ohmic discharges

A database of high density (0.3 < e[1020 m−3] < 0.8), low qa(1.9 < qa < 3.4), Ohmic discharges from the ASDEX experiment is analysed statistically. Bulk parameter scalings and parameterized temperature and density profile shapes are presented. The total plasma kinetic energy, assuming Ti = Te, scales as e0.54±0.01 IpO.90±0.04 and is almost independent of the toroidal magnetic field. The electron temperature profile peaking factor scales as T03/2/(T3/2) = 0.94(± 0.04)qa1.07±0.04, in close agreement with the assumption of classical resistive equilibrium. In the inner half of the plasma, the inverse fall-off length for both temperature and density has a strong dependence on qa, with the temperature dependence being more pronounced. Outside the half-radius, the qa dependence disappears, but the density profile broadens near the edge with increasing plasma current. A second database of moderate density, moderate qa discharges (0.2 < e/[1020 m−3] < 0.4, 2.4 < qa < 4.2), is presented for comparison.