http://www.matthewmassey.com/Testing.htm
This is just plain cool. I wanna build one. Not that my wife would enjoy having a military level piece of high voltage death created in my garage...but a man can dream can't he.
The simple high voltage railgun was tested in May 2005. Previous to firing a current limiting resistor was placed on the railgun and the voltage across the barrel was raised to determine at what voltage flash over occurred. The pulse power supply is capable of operation at 10,000 Volts.
er...that's a lot.