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The components of the ITER Diagnostics are located all over on the inner and outer shell of the Vacuum Vessel, in the Ports, on the Divertor Cassettes and in the Cryostat as well. Sensors require electrical transmission lines to transmit both of the diagnostic and control signals across the vacuum boundaries. To transmit the signals, Mineral Insulated cables will be used.
During the last 2 years under an F4E contract, the Tokamak Services for Diagnostics group at Wigner RCP has performed several experiments on MI cables, in close collaboration with F4E and IO team members. This paper outlines one of these experiments to measure the thermal gradient induced voltage in the cable cores. This was needed to evaluate the electrical noise levels due to thermal gradients in order to know if the noise has significant effect on the signal of some sensitive diagnostics. The subjects of the tests was a couple of Twisted Twin Mineral Insulated Cables, as this type of cables are used by the magnetics in the ITER machine.
The work leading to this publication has been funded partially by Fusion for Energy under the Specific Grant Agreement F4E-FPA-328-SG07. This publication reflects the views only of the authors, and Fusion for Energy cannot be held responsible for any use, which may be made of the information contained therein.
