Session RP1 - Poster Session VIII.
POSTER session, Thursday afternoon, October 30
Fran Hill Southeast Exhibit Hall, ACC
The Faraday shield (FS) and the strap array are the in-vessel elements of Ignitor’s ICRH antennas. Detailed non-linear and 3-D finite element analyses were performed to analyze their thermal and structural behavior. Dynamic disruption loads are superposed to quasi-static thermal loads relying on the different time scale of the two phenomena. Disruption loads on the FS are computed by using an inductive-resistive lumped parameter circuit and those on the straps by using a resistive circuit. Disruption loads on the Faraday shield bars are minimized by electrically insulating one side of the bars. The effects of induced eddy currents on the straps are taken into account. Moreover, the latest simulations model the thermal loads over the straps taking into account the presence of the FS. The mechanical design of each component is optimized in order to facilitate the full remote handling installation, to minimize the stresses induced during plasma pulses and to guarantee a high degree of reliability. Finite element analyses show that the FS and the straps will be able to withstand the expected loads.