(Color online) Principle of phase contrast imaging.
(Color online) PCI wave number detection capability. Two peaks at 2.8 and on the spectrum correspond to the PCI diagnostic measurement of the 15 and sound waves, respectively.
(Color online) Magnetic pitch angle vs vertical coordinate for a typical shot. The thickness of curve indicates the range of pitch angle across the 32 PCI viewing chords.
(Color online) Localization hardware setup.
(Color online) Physics principle of the vertical localization through the magnetic pitch angle change along the beam.
(Color online) Frequency/wave number spectra of plasma fluctuations measured by the PCI diagnostic. On the left corner of each plot, the diagnostic line of sight is shown according to the masking phase plate setup: (a) the bottom plasma view and (b) the top plasma view.
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