A New Faraday Screen For Tore Supra ICRH Antenna

A New Faraday Screen For Tore Supra ICRH Antenna

A New Faraday Screen For Tore Supra ICRH Antenna 150 150 UKAEA Opendata

A New Faraday Screen For Tore Supra ICRH Antenna

In the framework of the Ion Cyclotron (IC) developments held in Cadarache, the design of a new Faraday Screen (FS) was initiated to replace the aging ones mounted on the 3 Tore Supra (TS) antennas. The new conceptual design proposed is steered by conclusive results of electrical simulation stressing the need to suppress the parallel RF currents flowing on the FS frame to reduce the RF sheaths. Two major modifications are implemented on a TS FS to reduce the j// circulation: apertures on the top and bottom closure walls of the antenna radiating box, and cantilevered FS bars (that is, bars not connected to the vertical central septum). This single connection point also eases the FS rod thermal expansion, resulting in less mechanical stresses. In addition, the cantilevered bar design avoids eddy current loops which reduces electromagnetically induced stresses during disruptions. If successful with plasma operation, this RF structure provides a promising new option to simplify the ITER IC Faraday screen design.

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01/01/2009