A new diagnostic technique has been developed that couples a spectrometer and an image-intensified camera into the traditional motional Stark effect (MSE) system on DIII-D. The image-intensified camera syncs with the photo-elastic modulators to spectrally resolve the Stokes parameters across the Stark multiplet. Polarization dependent phase shift, likely from a plasma facing mirror, leads to the spectropolarimeter measuring a variation in the polarization angle across the MSE spectrum of ∼8°.
Spectrally resolved polarization angle across the motional Stark effect spectrum
Note: Paper published as part of the Special Topic on Proceedings of the 23rd Topical Conference on High-Temperature Plasma Diagnostics.
B. S. Victor, S. L. Allen, C. T. Holcomb, C. Samuell, A. Thorman; Spectrally resolved polarization angle across the motional Stark effect spectrum. Rev. Sci. Instrum. 1 April 2021; 92 (4): 043508. https://doi.org/10.1063/5.0040543
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