Stark broadening of neutral helium lines and spectroscopic diagnostics of pulsed helium plasma

Stark broadening parameters (widths and shifts) of two He I isolated spectral lines are measured in a plasma of a low-pressure pulsed arc. Plasma electron densities, determined by spectroscopic method based on previously calibrated He I lines, ranges from 1 x 10¹⁶ cm^-3 to 6 x 10¹⁶ cm^-3. The plasma electron temperature acquired by a Boltzmann plot of several He I lines, lies in the interval 8 000-30 000 K. Results of this work are compared with theoretical predictions and with other experimental data.Received: 30 April 2003, Published online: 29 July 2003PACS: 52.70.-m Plasma diagnostic techniques and instrumentation - 52.70.Kz Optical (ultraviolet, visible, infrared) measurements - 32.70.Jz Line shapes, widths, and shiftsR. Santamarta: Present address: DESY/ZEUS Hamburg, Germany.