Electromagnetic transducers close to high-temperature plasma in the thermonuclear fusion experiment RFX

RFX is a magnetically confined fusion experiment in operation since 1992 in Padova, Italy. Analysis of the magnetic field is essential for the safe operation of the machine and the understanding of high-temperature plasma dynamics. Both of these issues require an accurate electromagnetic diagnostic system. In this paper, after a discussion of the problems related to magnetic measurements in fusion experiments, with particular reference to the RFX environment, the probes installed inside the vacuum vessel are described.