Stark broadening of Balmer lines in the density range (2-8) ×1014cm−3

Experimental profiles of the hydrogen Balmer lines ($H_{\gamma }-H_{10}$) have been measured over the density range (2-8) × ${10}^{14}$ ${\mathrm{cm}}^{-3\mathrm{}}$ and compared with theoretical profiles. Electron densities were measured using a multipass interferometer, while plasma homogeneity was demonstrated using a Langmuir probe. Electron temperatures were in the range 1-2.0 eV. The electron density as deduced from line profiles tended to be as much as 10% lower than that from the interferometer at higher densities. At lower densities, the two methods agreed to within experimental error. Evidence for asymmetries on the line wings was noted.