The paper reports on experimental studies of pulsed plasma-ion streams generated by the RPI-IBIS facility equipped with coaxial multi-rod electrodes and operated at about 30 kV, with the pulsed injection of pure deuterium. Ion measurements were performed at time-delays τ (between the gas-valve triggering and a HV pulse) equal to 170 µs (slow mode) and 130 µs (medium mode). To determine mass-and energy-spectra of ions the use was made of a Thomson-type spectrometer. An influence of the initial gas conditions (determined by τ) on the energy spectra of deuterium-ions was demonstrated. To study the spatial structure of plasma-ion streams the use was made of an ion-pinhole camera equipped with PM-355 nuclear-track detectors and placed on the discharge axis. The application of Al-filters enabled to record deuterons of highest energy and to identify sources of their emission. The measurements confirmed the strong influence of the initial gas conditions on the energy distribution of the emitted plasma-ion streams and their spatial structure. The obtained results are of importance for basic plasma physics and for application-oriented research, e.g. modifications of different materials.