[en] A detailed study of the main processes, accompaning the rapid acceleration regime in a pulse plasma accelerator is made. An important role of turbulent processes developing at the acceleration and determining the ion acceleration is shown. The studies were conducted at a pulse plasma accelerator in the fast particle generation regime. The determination of plasma density and the distribution of magnetic field intensity in the accelerator channel permitted to calculate values of current velocities, i.e. relative velocities of electrons and ions at different discharge stages. The measurements of the continuous spectrum emitted by the plasma, in the visible range of wave lengths showed that for a wide range of conditions during the operation with hydrogen, helium and mixture of the gasses the elctron temperature differs within the range from 0.5 to 1.5 eV for different discharge stages. For measuring the intensity of electric fields in plasma the measurements of satellites of forbidden helium lines were performed. The characteristics profiles of the permitted helium line lambda 4471 A and satellites near the forbidden line for different moments of time, obtained near the outlet from the accelerator are given