What you have there is an old flashbulb firing reflector. It's nothing like an electronic flash and only uses a low voltage. The batteries commonly used were 15 or 22.5 volts and you'd have to lick one to even feel its voltage. The battery itself was a flat-pile design only capable of delivering a few milliamps. Therefore a capacitor was used to supply the higher current needed to ignite the flashbulb reliably. OTOH an electronic Xenon flash tube typically needs 350 volts to fire it. Much different and much more lethal!