Special Effect of Parallel Inductive Electric Field

Acceleration of electron by a field-aligned electric field during a magnetospheric substorm in the deep geomagnetic tail is studied by means of a one-dimensional electromagnetic particle code. It was found that the free acceleration of the electrons by parallel electric field is obvious, kinetic energy variation is greater than electromagnetic energy variation in the presence of parallel electric field. Magnetic energy is greater than kinetic energy variation and electric energy variation in the absence of parallel electric field. More wave modes in the presence of the parallel electric field are generated than those in the absence of the parallel electric field.