Stark shift of neutral helium lines in low temperature dense plasma and the influence of Debye shielding

In this work, we present the results of an experimental study of the Stark shifts of atomic helium lines at 706.519, 728.135, 471.315, 501.568, 667.815 and 447.148 nm in the electron density range (0.6-7 x 10 super( 23) m super( -3). Stark shift is always presented together with the corresponding electron density and electron temperature. Best-fitting formulas of experimental data enable plasma electron density diagnostics with an accuracy of (15-20 per cent) in the temperature range (10,000-30 000) K. The influence of Debye shielding on the Stark shifts is carefully examined and the experimental results are compared with other experimental and theoretical data.