TESTING OF ECESIM CODE IN MATLAB FOR EC EMISSION ESTIMATES FROM ITER PLASMA IN THE PRESENCE OF POLARIZATION SCRAMBLING IN WALL REFLECTIONS

We have tested a MATLAB version of the ECESIM code [1] The ECESIM code, originally in IDL, calculates the Electron Cyclotron Emission (Radiation Temperature) given the electron temperature, density and magnetic field radial profiles of a tokamak plasma. This was developed for the analysis of DIII-D ECE and has been shown to be appropriate for the mildly relativistic finite density regime of ITER [2]. The physics of code is based on the theoretical formulation by Bomatici [3]. The MATLAB version of the ECESIM code has been used to calculate the X-and O-mode ECE emission for ITER Scenario-2. From the X and O mode emissivities for ITER, we have identified the frequencies which may be particularly vulnerable to any polarization scrambling which might take place prior to the polarizations being separated.