Full steady state LH scenarios in Tore Supra

Lower hybrid discharges have been realised in Tore Supra using feed‐back control of the primary circuit voltage (Voh) such that the loop voltage was maintained exactly zero near the plasma surface. This new scenario allows the plasma current to float and quickly reach an equilibrium value determined by the current drive efficiency and Lower Hybrid power. Recent experimental results show that, with the new ‘‘constant flux’’ scenario the coupled plasma and primary currents reach a steady state in less than 10 s which is in good agreement with theoretical expectations. A complete analysis of this scenario is presented.