Where is the fault ?

The platform with the pick-up coils aligned on the median plane of the magnet slides along magnet's aperture. The voltage induction on all pick-up coils is monitored during the experiment with an emphasis put on the difference between the indications of coils no 3 and 5, and the total signal on coils 1 and 2. A passage from unbalanced to balanced absolute signal on both coils in each pair indicates a longitudinal position of an inter-turn short circuit. One of the MBSMS dipole magnet models was equipped with micro-relays soldered on the internal layer of the coils, in order to generate short circuits in well defined positions. The longitudinal position of the short circuits was successfully established for all of the installed micro-switches. Moreover, as it is shown below the indication of the Coils 1 and 2 are extremely sensitive to the azimuthal position of the short circuit, which enables to indicate also the angular position of the problem.

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