Transport Barrier and Current Profile Studies on the JET Tokamak

摘要

This thesis reports on studies and modelling of internal transport barriers and current density profiles in the Joint European Torus (JET) tokamak with a fluid transport code. Explanations for the following open questions are sought: what are the mechanisms that govern the formation and dynamics of the ITBs in JET and secondly, how can the current density profile be modified and further, how does it affect ITBs and plasma performance.