Determination of non-inductive current profiles in Tore Supra

Producing stationary non-inductive discharges is one of the first objective s of Tore Supra. On this tokamak these discharges of various types have alr eady been achieved in a reproducible manner with fast wave electron heating (FWEH) and lower hybrid current drive (LHCD) applied separately. In the fi rst scenario, 50% of bootstrap current was reached with 5 MW of FWEH power. In the second case, the current was generated by 3 MW of LH power for almo st two minutes. The non-inductive current density profile is determined for these scenarios, with an experimental method relying on time sequence equi libria and on the prediction of the parallel conductivity. With this method , bootstrap current predictions are validated. It is then possible to deter mine the contribution of the different types of non-inductive currents for improved confinement regimes with radio frequency and current drive heating .