Modeling of the M X-ray line structures for tungsten and L X-ray line structures for molybdenum

Modeled within the Collisional-Radiative approach, for parameters relevant to plasmas in the centre of JET, the M X-ray line structures for tungsten and L X-ray line structures for molybdenum both occur in the wave length range 5.0-5.35 [Angstrom]; and, their strengths are comparable. Therefore, the spectra obtained with the upgraded high-resolution X-ray spectrometer KX1 on JET should include both tungsten and molybdenum in their interpretation. The same will be true for the high-resolution X-ray diagnostic on tokamaks such as WEST and ITER, where tungsten plasma-facing components will be implemented.