Optical emission spectroscopy of pulsed plasma streams emitted from a modified PF-1000 facility

The paper presents results of the recent spectroscopic studies of pulsed plasma streams generated in the PF-1000 facility at the IFPiLM in Warsaw. This facility has recently been equipped with a modified inner electrode, which had the front copperplate with a central tungsten (W) insert of 50 mm in diameter. Interactions of the collapsing current sheath and electron beams with this insert have changed characteristics of the X-ray and VR emission considerably. New spectroscopic measurements were performed at the chosen angle and perpendicular to the discharge axis. In the second case optical emission spectra were recorded at different distances from the electrode outlets, and at various instants after the current peculiarity (dip). It enabled to determine dynamics of the VR emission in the investigated VR range.