Related Experiment Video
Updated: Feb 8, 2026

Ion Exchange Chromatography IEX Coupled to Multi-angle Light Scattering MALS for Protein Separation and Characterization
Published on: April 5, 2019
On the scattering correction of fast-ion D-alpha signals on NSTX-U
G Z Hao1, W W Heidbrink1, D Liu1
1University of California, Irvine, California 92697, USA.
Abstract:
Analysis of fast-ion D-alpha (FIDA) data on National Spherical Torus Experiment-Upgrade (NSTX-U) shows that the cold Dα line contaminates the FIDA baseline. The scattered light is comparable to the FIDA emission. A scattering correction is required to extract the FIDA signal. Two methods that relate the scattered light contamination to the intensity of the cold Dα line are employed. One method uses laboratory measurements with a calibration lamp; the other method uses data acquired during plasma operation and singular value decomposition analysis. After correction, both the FIDA spectra and spatial profile are in better agreement with theoretical predictions.
Related Concept Videos
Ion Channels
Ion channels are specialized integral membrane proteins on the plasma membrane that allow...
Distance Corrections
Power Factor Correction
Common Ion Effect
Precipitation of Ions
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
Formation of Complex Ions

