Doppler-Broadening Measurements of X-Ray Lines for Determination of the Ion Temperature in Tokamak Plasmas

Abstract

Ion-temperature results are deduced from Doppler-broadening measurements of the $K\ensuremath{\alpha}$ ($1s\ensuremath{-}2p$) resonance line emitted from heliumlike iron impurity ions in the hot central core of PLT (Princeton Large Torus) tokamak discharges. The measurements were performed using a high-resolution Bragg-crystal spectrometer with a multiwire proportional counter.