Magnetic bubble for CR experiments in space

It is proposed to equip with an intense magnetic field the innovative isotropic, high granularity, homogeneous, deep cubic calorimeter, nicknamed ‘calocube’, in development for CR experiments in space. A number of identical coils are arranged for constituting three mutually orthogonal magnetic torus’s forming a ‘magnetic bubble’ wrapping the calocube. Number and shape of the coils are discussed. Magnetic field intensity, and encumbrance and mass of the coils are evaluated for a model of the system wrapping a 1 m side calocube. A reduced version, with only one magnetic torus (4 coils) wrapping a 0.8 m side calocube is evaluated and discussed.