THE EDDY CURRENT LOSSES IN THE CENTRAL COLUMN OF ASDEX UPGRADE DURING THE PLASMA DISCHARGE AND CLEANING DISCHARGE
The mechanical poloidal field support structure of ASDEX Upgrade contains a column of non-magnetic steel in the centre of the torus arrangement. In this central column eddy current losses occur during the plasma discharge and cleaning discharge. The diffusion problem in the column is solved by analytical methods in this report. The solution is valid for arbitrary temporal development of the exciting current in the OH transformer. The magnetic field obtained is given by a Fourier-Bessel series, the electric field by a DINI series. For an exciting current in the form of a harmonic function or an e-function a closed mathematical expression can be set for the series. The power and energy values and the temperature increase are derived from the electromagnetic field. The impedance of the column and the decrease of the plasma loop voltage caused by the column are calculated.
Bibliographic Reference: WRITE TO MAX-PLANCK-INSTITUT FUER PLASMAPHYSIK, 8046 GARCHING BEI MUENCHEN (GERMANY), MENTIONING REPORT IPP 1/222, 1984
Record Number: 1989122084900 / Last updated on: 1987-01-01
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