The TCV tokamak is equipped with a 4-channel ultrasoft X-ray monochromator allowing low resolution (ą/ą30) measurements int the energy range 200-800eV.Its main purpose is simultaneously monitor emission from four of the main Kŕ resonance lines of highly ionised light impurities such as Boron, Carbon and Oxygen.Wavelenght selectivity is achieved using synthetic multilayer mirrors having.
