#1 Just a test of the scope and stuff. #2 Voltage across and current through the gap. Spike close to 240A! Top Trace = 2000V/div 2.5MHz Bottom Trace = 100A/div 2.5MHz 5mS/div #3 Same setup. Voltage across gap is dropping quickly to zero. Current has initial 200A spike followed by many ~80A spikes. Top Trace = 2000/div 2.5MHz Bottom Trace = 100A/div 2.5MHz 100uS/div #4 Same setup. Half of the following current spikes are positive and half are negative. Top Trace = 2000/div 2.5MHz Bottom Trace = 100A/div 2.5MHz 25uS/div #5 Same setup. Shows initial and second spikes. Voltage is showing something now. Current appears to have area under the curve now. Top Trace = 2000/div 2.5MHz Bottom Trace = 100A/div 2.5MHz 1uS/div #6 Same setup. Voltage and current spikes show high frequency ring riding on the waveform. Initial current burst is 400nS. Voltage burst is occurring about 50nS before current burst. Top Trace = 2000V/div 2.5MHz Bottom Trace = 100A/div 2.5MHz 100nS/div #7 Same setup. ~60MHz signal clearly seen. At 2.5MHz bandwidth that is hard to believe. Top Trace = 2000V/div 2.5MHz Bottom Trace = 100A/div 2.5MHz 25nS/div #8 Same setup up but now looking at 30MHz ports. Voltage looks like ~2000v/div. Current should be about 5000A/div!!! Voltage shows heavy spikes now. Top Trace = ~~2000V/div ~30MHz Bottom Trace = ~~5000A/div ~30MHz 5mS/div #9 Same setup as above but changed current scale. Initial current spike must be 5 times higher than following current spikes. Current spikes are almost all positive. Top Trace = ~~2000V/div ~30MHz Bottom Trace = ~~1000A/div ~30MHz 100uS/div #10 Same Setup. Voltage clearly has spikes but is this real or noise. I bet it is noise from the large current spikes being picked up on the voltage transducer. – Needs shield!! Top Trace = ~~2000V/div ~30MHz Bottom Trace = ~~1000A/div ~30MHz 25uS/div #11 Same setup. First two spikes. Voltage triggered on negative swing in this picture. Most others trigger positive. Top Trace = ~~2000V/div ~30MHz Bottom Trace = ~~1000A/div ~30MHz 1uS/div #12 Heavy 50MHz oscillation clearly seen in current waveform. Note that voltage shows noise or something 50nS before the first current spike. Top Trace = ~~2000V/div ~30MHz Bottom Trace = ~~1000/div ~30MHz 100nS/div #13 Same setup. First spike is clearly giant here! Voltage oscillation in in sync with current. Probably noise being picked up. Top Trace = ~~2000v/div ~30MHz Bottom Trace = ~~1000A/div ~30MHz 25nS/div #14 Same as 13 but with current scale turned way down. Turned down voltage but scope played bandwidth tricks. Top Trace = ?????/div ~30MHz Bottom Trace = ~~2500A/div ~30MHz 25nS/div #15 Placed voltage probe across primary cap. Switched to 2.5MHz ports. Top Trace = 2000V/div 2.5MHz Bottom Trace = 100A/div 2.5MHz 5mS/div #16 Same setup as 15. Top Trace = 2000V/div 2.5MHz Bottom Trace = 100A/div 2.5MHz 100uS/div #17 Same setup. Note initial spike in current waveform. Have often seen this in others and own waveform pictures. Probably noise caused by giant initial spike. Top Trace = 2000V/div 2.5MHz Bottom Trace = 100A/div 2.5MHz 25uS/div #18 Same setup. Secondary and other spikes are occurring at the peaks of the voltage waveform. -- Very important!!! Top Trace = 2000V/div 2.5MHz Bottom Trace = 100A/div 2.5MHz 1uS/div #19 Same setup. Voltage and even current show initial 50nS signal before main burst here. Top Trace = 2000V/div 2.5MHz Bottom Trace = 100A/div 2.5MHz 100nS/div #20 Same setup. Top Trace = 2000V/div 2.5MHz Bottom Trace = 100A/div 2.5MHz 25nS/div #21 Switched to 30MHz ports. Voltage is swamped with noise from current spikes. Top Trace = ~~4000V/div 30MHz - Scope bandwidth warning. Bottom Trace = ~~1000A/div 30MHz 5mS/div #22 Same setup. Top Trace = ~~4000V/div 30MHz - Scope bandwidth warning. Bottom Trace = ~~1000A/div 30MHz 100uS/div #23 Same setup. Top Trace = ~~4000V/div 30MHz - Scope bandwidth warning. Bottom Trace = ~~1000A/div 30MHz 25uS/div #24 Same setup. Top Trace = ~~4000V/div 30MHz - Scope bandwidth warning. Bottom Trace = ~~1000A/div 30MHz 1uS/div #25 Same setup. Top Trace = ~~4000V/div 30MHz - Scope bandwidth warning. Bottom Trace = ~~1000A/div 30MHz 100nS/div #26 Same setup. Top Trace = ~~4000V/div 30MHz - Scope bandwidth warning. Bottom Trace = ~~1000A/div 30MHz 25nS/div #27 Same setup. But reduced scale. Top Trace = ????/div 30MHz Bottom Trace = ~~5000A/div 30MHz 25nS/div #28 Same setup. Centered on second burst. Top Trace = ????V/div 30MHz Bottom Trace = ~~500A/div 30MHz 1uS/div #29 Same setup. Centered on second burst. Top Trace = ????V/div 30MHz Bottom Trace = ~~500A/div 30MHz 50nS/div #30 Same setup. Centered on second burst. Top Trace = ????V/div 30MHz Bottom Trace = ~~500A/div 30MHz 25nS/div #31 Connected simple wire antenna to channel 1. Current still on channel 2 at 30MHz Top Trace = ????V/div ?MHz Bottom Trace = ~~500A/div 30MHz 50uS/div #32 Same setup. Inital current spike is clearly causing the typical voltage spike seen at the beginning of the firing cycle with a wire antenna. Other current spikes can be slightly seen in top antenna trace. Top Trace = ????V/div ?MHz Bottom Trace = ~~5000A/div 30MHz 10uS/div #33 Same setup. Turned channel 2 scale up to see the following spikes. Negative spikes in current very weak in this picture. Top Trace = ????V/div ?MHz Bottom Trace = ~~1000A/div 30MHz 10uS/div #34 Same setup. Used 2.5MHz current port and turned scale way up. Current spikes are clearly occurring at the peaks of the voltage waveform. Top Trace = ????V/div ?MHz Bottom Trace = ??/div 2.5MHz – Bandwidth warning 10uS/div #35 Same setup. reduced current scale. Top Trace = ????V/div ?MHz Bottom Trace = 20A/div 2.5MHz 10uS/div #36 Same setup. But changed scale. Top Trace = ????V/div ?MHz Bottom Trace = 10A/div 2.5MHz – bandwidth warning 5uS/div #37 Same setup. Switched to 30Mhz port on current Top Trace = ????V/div ?MHz Bottom Trace = ~~500A/div 30MHz 1uS/div #38 Same setup. Top Trace = ????V/div ?MHz Bottom Trace = ~~500A/div 30MHz 250nS/div #39 Same setup. Top Trace = ????V/div ?MHz Bottom Trace = ~~500A/div 30MHz 25nS/div #40 Same setup. But looking at second spike. Top Trace = ????V/div ?MHz Bottom Trace = ~~500A/div 30MHz 500nS/div #41 Same setup. Top Trace = ????V/div ?MHz Bottom Trace = ~~500A/div 30MHz 50nS/div #42 Same setup. Not too many people have seen the second current spike at 10nS before!! :-) Measured oscillation at 51MHz. Probe bandwidth is probably higher than 30MHz. Theory says optics should go to 125MHz. Can current shunt go this high?? Top Trace = ????V/div ?MHz Bottom Trace = ~~500A/div 30MHz 10nS/div