Top: current-potential characteristics for NaCl grains with a = 0.01 μm in the Jupiter plasma environment at r ~ 5.7R_J (in the Jupiter equator and at fixed 110° western longitude, see text) with , , and kT_s = 2.5eV. All currents contributing to charging process are shown. Bottom: dependence of the secondary electron current J_s(φ_d,a) given by Eq. (7) on the potential of NaCl grains of different radii corresponding to Fig. 1 (top).