This work is dedicated to research of peculiarities of character of electron flow in magnetic periodic system (MPFS) with short reversing regions which forms complex curvilinear movement with high acceleration of charging particles. There are regimes of stable and not stable behavior of flow and regions of intensity magnetic breaking radiation in results of theoretical and experimental analyses of electron trajectory. Shows that forming of chain of electron oscillators which are made by MPFS with long lens may be used as basis for making low voltage sources of MM and subMM ranges.