Optical sources of several megawatts-cm"" 2 over large surface areas are available from
electrical discharges initiated by exploding films and wires immersed in a gas. Discharging
high current capacitor banks into the metal conductors causes them to melt, vaporize,
and then eventually ionize to a high-conductivity plasma of less than a milliohm/cm-length
resistance. As such over 1,000 MW of ohmic heating goes into the discharge, elevating its
blackbody temperature up to 35,000 K.