The TEXTOR program at the KFA, Juelich

The problem of impurity generation in fusion devices has, as a consequence of rapid development in the confinement sector, reached a high priority level. In collaboration with the KFA institutes for surface and vacuum physics, nuclear chemistry, solid state physics , reactor development, reactor materials, and others, the Institute for Plasma Physics of the KFA has initiated a program for a systematic study of the interaction of hot confined plasmas with the surrounding first wall. Because of the nonlinear character of the problem, not only simulation measurements but also the availability of a tokamak-type flexible confinement device, TEXTOR, with adequate access to all domains of relevance is held indispensible. Essential parameters of TEXTOR are major and minor plasma radii 175 and 50 cm, toroidal field 2 T initially, 2.6 T later, flux swing 4.1 Vs, wall temperature up to 6000 C, and easy exchange ability of first wall. (Auth.)