TY - GEN
T1 - Electron density determination from Stark broadening of high-n hei lines
AU - Koubiti, M.
AU - Capes, H.
AU - Godbert-Mouret, L.
AU - Marandet, Y.
AU - Meigs, A.
AU - Rosato, J.
AU - Rosmej, F.
AU - Stamm, R.
PY - 2005/12/1
Y1 - 2005/12/1
N2 - Calculations of Stark profiles of high-n lines (i.e., transitions from high-lying or Rydberg levels) emitted by neutral helium in a relatively dense plasma are presented. Stark broadening of HeI lines arising from Rydberg states are used here for the first time to determine the plasma electron density for densities corresponding to detached divertor plasmas or recombining regimes. In principle, this requires in addition to high-resolution spectroscopic measurements, the use of accurate atomic data which are not available at present time. However, since reliable data are not yet available, the results presented here have been obtained with a H-like approximation for the dipolar transition reduced matrix elements. The deduced electron density from Stark broadening is compared to its experimental value measured by a Langmuir probe.
AB - Calculations of Stark profiles of high-n lines (i.e., transitions from high-lying or Rydberg levels) emitted by neutral helium in a relatively dense plasma are presented. Stark broadening of HeI lines arising from Rydberg states are used here for the first time to determine the plasma electron density for densities corresponding to detached divertor plasmas or recombining regimes. In principle, this requires in addition to high-resolution spectroscopic measurements, the use of accurate atomic data which are not available at present time. However, since reliable data are not yet available, the results presented here have been obtained with a H-like approximation for the dipolar transition reduced matrix elements. The deduced electron density from Stark broadening is compared to its experimental value measured by a Langmuir probe.
UR - https://www.scopus.com/pages/publications/84873346578
M3 - Conference contribution
AN - SCOPUS:84873346578
SN - 9781622763320
T3 - 32nd EPS Conference on Plasma Physics 2005, EPS 2005, Held with the 8th International Workshop on Fast Ignition of Fusion Targets - Europhysics Conference Abstracts
SP - 1678
EP - 1681
BT - 32nd EPS Conference on Plasma Physics 2005, EPS 2005, Held with the 8th International Workshop on Fast Ignition of Fusion Targets - Europhysics Conference Abstracts
T2 - 32nd European Physical Society Conference on Plasma Physics and Controlled Fusion combined with the 8th International Workshop on Fast Ignition of Fusion Targets
Y2 - 27 June 2005 through 1 July 2005
ER -