ELECTROMAGNETIC EFFECTS OF THE USE OF FERROMAGNETIC MATERIALS WITHIN THE NET MACHINE
The inclusion of ferromagnetic materials in the close proximity of the plasma is being considered in the design of the NET machine. The use of these materials is of interest in two areas: (i) In the blanket and first wall design, where (ferromagnetic) martensitic steels offer improvements over austenitic, in terms of higher thermal conductivity and lower thermal expansion, thermal creep and void swelling. The ferromagnetism is an unwanted side effect. (ii) In the toroidal field coil design, where ferromagnetic inserts may be considered to reduce the toroidal field coil ripple at the plasma boundary. The effect of ferromagnetism has to be investigated from the viewpoints of toroidal and poloidal field, since although the field levels are such that the steel is saturated, the direction of the magnetisation vector can change with the time varying fields. The codes GFUN and TOSCA have been used with simplified geometric representations to analyse the various aspects of the effects of the ferromagnetics.
Bibliographic Reference: 14TH SOFT CONFERENCE, AVIGNON (FRANCE), SEPT. 8-12, 1986 VOL. 1, PP. 699-705 1895 P., 1986, VOL. 1 AND VOL. 2, ISBN 0 08 034935 8 WRITE TO PERGAMON PRESS, HEADINGTON HILL HALL, OXFORD, OX3 0BW (UK), PRICE: UKL 220 (FOR BOTH VOLS.)
Record Number: 1989126048701 / Last updated on: 1989-01-01
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