Plasma radiation in tokamak disruption simulation experiments

Summary form only given. Plasma impact results in sudden evaporation of divertor plate material and produces a plasma cloud which acts as protective shield. The incoming energy flux is absorbed in the plasma shield and is converted mainly into radiation. Thus the radiative characteristics of the target plasma determine the dissipation of the incoming energy and the heat load at the target. Radiation of target plasma is studied at the two plasma gun facility 2 MK-200 at Troitsk. Space- and time-resolved spectroscopy (visible, VUV and soft X-ray) and time-integrated space-resolved calorimetry are employed as diagnostics. Graphite and tungsten samples are exposed to deuterium plasma streams with the following parameters: density n=10/sup 16/ cm/sup -3/, temperature T/sub i/=500 eV, T/sub e/=120 eV, plasma beta 0.25, power density W=10 MW/cm/sup 2/, pulse duration t=20 /spl mu/s. Target plates are oriented perpendicular to the magnetic field lines (B=2T). It is found that the radiative characteristics depend strongly on the target material.