A phase synchronization system of high-speed (up to 4 × 10~4 frames/s) photographic shooting on two ВФУ-1 units used for studying a vacuum arch is described. The design alterations brought into the ВФУ-1 unit and the designed electronic control circuit allowed one to obtain one- to two-frame phase synchronization and 0.2% rate errors using comparatively simple methods.
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