The Tokamak experiment “UNITOR”-A device for plasma-wall interaction research

Installation and performance of the small research Tokamak device “UNITOR” ( R = 0.3 m, a = 0.1 m) are reported. In the first phase of installation a toroidal magnetic field B = 1.2 T and a plasma current up to 50 kA provided by the power supplies. This leads to electron densities and temperature of 4 X 10 ¹³ cm ^-3 and 150 eV resp. The ion temperature reaches 50 eV, the pulse length is nearly 45 ms. This regime of plasma parameters is of interest for the plasma edge of fusion oriented experiments. Thus the device is well suited for the investigation of plasma-wall interaction. First experiments concerned with wall conditioning and neutral hydrogen transport are reported.