TECHNICAL LAY-OUT OF THE DYNAMIC ERGODIC DIVERTOR

A description of the layout for the dynamic ergodic divertor (DED) is presented. It is proposed to install a perturbation coil system consis ting of four quartets of coils and two compensation coils helically wo und on the high field side of TEXTOR-94. The windings follow the magne tic field lines at q = 3 surface for one toroidal turn. To obtain a st atic solution and a rotating field solution: the system can be operate d at DC, 50 Hz and in the band between 1 and 10 kHz. As power supplies , convertor units using 4-quadrant bridges with IGBTs (insulated gate bipolar transistor) are foreseen. The required frequency synchronizati on of the units will be enforced by a central control unit. (C) 1997 E lsevier Science S.A.