Dimensionless rho(*) scaling of particle transport in DIII-D L mode discharges

The scaling of the transport rate of particles with normalized gyroradius h as been measured for L mode discharges in the DIII-D tokamak. Both the heli um diffusivity and the effective electron particle diffusivity were measure d. In these L mode discharges, the particle diffusivities tend to scale lik e the ion thermal diffusivity, which scales between Bohm-like and Goldston- like. Non-zero inward pinch velocities are measured. Like the diffusivities , the pinch velocities increase with gyroradius.