A SCHEME FOR A DYNAMIC ERGODIC DIVERTOR IN TEXTOR

A helical multipolar coil system for dynamic edge ergodization of the TEXTOR plasma is proposed being energized by a three phase ac-current. This would permit a sweeping of the perturbation pattern with the aim (I) to establish a uniform distribution of the heat load at the wall components, (II) to increase the thickness of the scrape-off layer, (I II) to improve the helium exhaust and to enhance impurity shielding fo r controlled edge radiation cooling, and (IV) to possibly influence pl asma rotation. Resonant interaction with internal modes may be foresee n in a later phase.