THE LINEARIZED CREATE-L PLASMA RESPONSE MODEL FOR THE CONTROL OF CURRENT, POSITION AND SHAPE IN TOKAMAKS

CREATE-L, a simple and reliable linearized plasma response model for t he control of the plasma current, position and shape in tokamaks, is p resented. The basic assumption made is that the plasma behaviour is de scribed using three degrees of freedom, related to the total plasma cu rrent, internal inductance and poloidal beta. The state variables are the coil and plasma currents; the inputs are the applied voltages, whe reas poloidal beta and internal inductance play the role of disturbanc es. The outputs are field and flux values and some basic plasma parame ters. The model is tested against non-linear codes and validated via c omparison with experimental results.