Magnetic field concentration: Comparison between several shapes of superconducting shields

This paper deals with a system of flux; density concentration using superco nducting shields. The development of single grain high temperature supercon ductors allows the conception of large sized magnetic shields. These shield s force the flux density to be concentrated by modifying it; spatial distri bution. Our system consists in two low field solenoids, which have the same arrangement as Helmoltz coils. Between! these two coils, two superconducti ng plates are arranged on both sides of the axis, For this study, supercond uctor is considered as perfect. We propose to discuss the efficiency of several concentrating devices. To m ake our study, we performed a 3D-field calculation tool using a Monte-Carlo method. The main advantage of this method is a very simple algorithm to co mpute, even if the geometry is complicated, We have shown that if the dista nce between the two plates is small enough in respect to the coils diameter , the flux density is much higher than the one inside the coils. We also sh ow the influence of the shape of the shields in the guidance of the flux li nes. We have validated our simulations with an experiment.