Modeling of proton nose structures in the inner magnetosphere with a self-consistent electric field model

We present the results of inner magnetosphere numerical modeling with a self-consistent electric field. We reconstruct proton energy-time spectrograms, including some with proton nose structures. Using different sets of input parameters we investigate the role of the dawn-dusk potential drop and plasma sheet concentration on nose structure formation and dynamics. It is shown that nose structures can form up to L≈3.3 under periods of enhanced potential drop. The penetration of nose structures depends on shielding strength, which in turn is governed by boundary plasma concentration. In a quiet interval after a temporary potential drop increase, multiple nose structures are formed.