Collisionality dependence of density peaking in quasilinear gyrokinetic calculations

Linear gyrokinetic calculations and a quasilinear model are applied to compute the radial particle fluxes and investigate the properties of the particle transport in a tokamak plasma induced by ion temperature gradient and trapped electron mode instabilities. The paper focuses on the specific problem of the dependence of anomalous pinch and density peaking on collisionality.