These are simultaneous movies from the midplane and X-region GPI cameras of C-Mod. The cameras view the HeI light
from a local hdlium gas puff. The locations of these views are shown by the
square boxes at the right, each of which covers a region of ~6 cm x 6 cm.
The sample movie frame at the left shows the X-region and outer midplane images at
the same time during a shot.
The solid lines are the separatrix and the dashed lines are flux surfaces at 1 cm and 2 cm into the SOL.
The videos below were taken at 400,000 frames/sec using two Phantom 710 cameras.
In both cases the data is normalized by dividing each frame by the time-
averaged frame in that movie. Signal levels below some level were set to zero
for clarity.
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