Optical Diagnostics of Multi-Gap Gas Switches for Linear Transformer Drivers

摘要: The trigger characteristics of a multi-gap gas switch with double insulating layers, square-groove electrode supporter and UV pre-ionizing structure are investigated aided by high sensitivity fiber-bundle array detector, fiber framing camera, in addition to standard electrical diagnostics. fiber-bundle-array detector is used track the turn-on sequence each gap at timing precision 0.6 ns. Each bundle, including five fibers different azimuth angles, aims whole emitting area fed photomultiplier tube. spectrum response 260-320 nm, fused-quartz 200 μm diameter solar-blinded tube, adopted study effect on characteristics. capacity 4 frames per shot an exposure time 5 ns, employed capture evolution channel arcs. Based light signal gap, breakdown delay divided into statistical formative delay. A decrease both them, smaller jitter more arcs observed lower pressure. An increase voltage can reduce its jitter, while higher has relatively small influence number With 0.24 MPa pressure 60 kV voltage, be reduced 1.8 ns 0.67 only 0.5 0.25