Intensity radial profiles of VUV line radiation near the solid target in a hot plasma

An investigation of hot plasma interaction with solid target is carried out at the CASTOR tokamak (IPP Prague) and the GOL-3 multi-mirror magnetic trap facility (Budker Institute, Novosibirsk). In both experiments, the Imaging Seya-Namioka Spectrometer based on a spherical dispersion grating has been upgraded to monitor the radial profiles of the chord-integrated low-Z impurity line intensities in VUV spectral range. Such spatial resolved intensity monitoring in radial direction together with application of the radiation code simulation allows obtaining a radial distribution of ions of different ionization stages near the target immersed in edge plasma. The energy release from plasma to the target is order of 100 J/m2 in the CASTOR tokamak and 30 MJ/m2 in the GOL-3 magnetic open confinement system. (author)