Resolving the plasma electron temperature pedestal in JET from Thomson scattering core LIDAR data

摘要

One of the basic strengths of the JET core LIDAR Thomson scattering system (Fig.l) is its potential to measure electron temperature T_t and density n_e profiles simultaneously along the entire line of sight inside the torus. Its spatial resolution of 12cm suffices to resolve the global profile shape, but does not allow the visualization of small scale structures such as the narrow edge pedestal area,which has a typical length scale of 2-3cm. Enhancement of the system's resolving power can be obtained by applying a deconvolution to each of the signals from the 6 spectral channels using the system's instrument function, as has been demonstrated in [1].