Speakers
Description
In C-2W, an elevated impurity concentration, or the presence of high-Z impurities, can account for significant energy losses through radiation. To gauge plasma contamination from impurities, the effective ionic charge (Zeff) can be determined from measurements of Bremsstrahlung continuum radiation over a small spectral range free from line radiation. To this end, an integrated diagnostic system including visible and near-infrared Bremsstrahlung detectors, as well as Blamer-alpha (D) neutral detectors for pollutant removal, will be deployed in C-2W for improved estimates of time-dependent radial distributions of Zeff. The system is complemented by an array of survey spectrometers which enable full-range spectroscopic measurements of impurity emission lines from the vacuum ultraviolet to the near infrared, providing a good picture of the plasma composition. Here, the design scheme for this integrated diagnostic system is presented and discussed.
