Alright, I have a high-voltage DC-DC converter circuit made up, and it works sort-of ok... the problem is, it doesn't want to charge photo-flash caps nearly as fast as a proper camera flash circuit actually would.
I don't have a schematic drawn up (although I could probably scribble one out if needed), but basically my setup is this:
An oscillator using a camera flash transformer, which feeds into a voltage doubler, giving me about 580V-ish from a 1.95V input. If I push the input voltage much higher I get very odd things happening so that's as high as I dare to crank it. Current draw from my PSU is just under 40mA. This output is fed into a pair of photo-flash caps in series, which will eventually, after a few minutes, get up to around 500V... but I want to charge them faster, under a minute would be good. And no, I'm not making a coilgun ;)
I'm using 1N4007 diodes all over the place as they're the only ones I have rated for that kind of voltage, but I have read they suck for high-frequency switching... so I'm wondering if I'd see an improvement in performance by using UF4007 diodes instead? Also, what's the best/safest way to dump the cap charge? I have some scavenged horizontal output transistors that seem like they'd be up to the task.