Correlation of Soft X-ray Emission with Thompson Scattering Measurements of Electron Temperature in SSPX
POSTER
Abstract
In an effort to measure time-resolved changes in the plasma temperature over the 100 -- 300 eV range, soft X-ray photodiodes have been installed in SSPX. Two sensors with different quantum efficiency versus frequency distributions are aligned along a common chord tangent to the magnetic axis of the plasma. Analysis of the ratio of the two signals offers time-resolved insight into Bremsstrahlung soft X-ray emissions, which are a function of the chord integrated electron temperature. Results of a numerical model for the soft X-ray ratio are compared to experimental measurements. Correlation of the temperature data from these sensors to the diagnostic data taken from a Thomson scattering apparatus will be presented.
*Work performed under the auspices of the US DOE by University of California Lawrence Livermore National Laboratory under contract W-7405-ENG-48.