Investigations of pulsed plasma streams generated by “Prosvet” device operated with different gases

摘要

The paper presents the investigations of plasma streams generated by pulsed plasma gun “Prosvet” operated withuddifferent gases: krypton (m = 84), nitrogen (m = 14) and helium (m = 4). Contour parameters of working gas spectraludlines (full intensities and half-widths) are used for determination of spatial distributions of the electron density andudtemperature. Temporal distributions of the spectral lines intensities (both neutrals and ions of working gas), impurityudspectral lines and continuum intensities are analyzed. Plasma stream velocity was estimated by time-of-flight methodudbetween two monochromators (MUM) connected with photo-multiplier. Longitudinal distributions of the plasmaudpressure for different time moments and varied distances from the accelerator output have been used for investigation ofudthe plasma stream dynamics and study the plasma compression in the focus region for different operational regimes ofudplasma accelerator. Experiments show that operation regime of the accelerator and plasma stream parameters stronglyuddepend on the gas atomic mass.