Abstract
The paper reports spectroscopic studies of high-current PF-type discharges. Experiments within the large PF-1000 facility (operated at IPPLM in Warsaw) were aimed on temporal and spatial measurements of the plasma electron density by spectroscopic methods. To study visible-radiation (VR) emission characteristics of various PF-discharges a MECHELLE®900-type spectrometer was used. Measurements were performed at different distances from the electrode outlet. The linear Stark-broadening of deuterium Balmer lines, and particularly that of the Dβ (486 nm) line, was used to estimate the electron-concentration during and after the PF-pinch phase. Particular attention was paid to a dense-pinch portion at a distance of 8 cm from the electrode ends. The formation of this dense plasma region was also confirmed by images taken with fast X-ray-and VR-cameras.
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