title: A temporally and spatially resolved electron density diagnostic method for the edge plasma based on Stark broadening.
abstract: An electron density diagnostic (≥1010cm-3) capable of high temporal (ms) and spatial (mm) resolution is currently under development at Oak Ridge National Laboratory. The diagnostic is based on measuring the Stark broadened, Doppler-free spectral line profile of the n = 6-2 hydrogen Balmer series transition. The profile is then fit to a fully quantum mechanical model including the appropriate electric and magnetic field operators. The quasi-static approach used to calculate the Doppler-free spectral line profile is outlined here and the results from the model are presented for H-δ spectra for electron densities of 1010-1013cm-3. The profile shows complex behavior due to the interaction between the magnetic substates of the atom.
authors.affiliation: Department of Nuclear Engineering, North Carolina State University, Raleigh, North Carolina 27695, USA.
authors.forename: A
authors.initials: A
authors.lastname: Zafar
authors.affiliation: Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, USA.
authors.forename: E H
authors.initials: EH
authors.lastname: Martin
authors.affiliation: Department of Nuclear Engineering, North Carolina State University, Raleigh, North Carolina 27695, USA.
authors.forename: S C
authors.initials: SC
authors.lastname: Shannon
authors.affiliation: Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, USA.
authors.forename: R C
authors.initials: RC
authors.lastname: Isler
authors.affiliation: Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, USA.
authors.forename: J B O
authors.initials: JB
authors.lastname: Caughman