No abstract available

[en] ASDEX Upgrade, the successor to the ASDEX device, is a new tokamak now under construction at Garching. This experiment has a reactor-like divertor with the divertor coils located outside the toroidal field coils. This makes the power and energy requirements high since the total number of ampere-turns of the multipole coils increases approximately as the third power of the distance from these coils to the centre of the plasma. An investigation is made of the power supply system of this type of tokamak for different modes of operation in comparison with the conventional ASDEX divertor experiment. (author)

[en] ASDEX Upgrade, the successor to the ASDEX device, is a new tokamak now under construction at Garching. This experiment has a reactor-like divertor with the divertor coils located outside the toroidal field coils. This makes the power and energy requirements high since the total number of ampere-turns of the multipole coils increases approximately as the third power of the distance from these coils to the centre of the plasma. The paper is concerned with investigating the power supply system of this type of tokamak for different modes of operation in comparison with the conventional ASDEX divertor experiment. On the basis of nonlinear circuit simulation it is shown that the current requirements during plasma start-up in the inductively coupled divertor field coils can be met by two-quadrant rectifiers. The realization of the complete power supply system is shown in detail

No abstract available