An aluminum pancake coil is designed to amplify pulsed power in the ra
nge of 100-MW to a 100-mOMEGA electro-thermal load. For the tradeoff b
etween the coil energy density limit and energy discharge efficiency,
the frequency dependence of its current and magnetic field distributio
ns is calculated in the range of dc to 1 kHz. Near dc magnetic field m
easurements are compared to the calculated results. Energy efficiency
of about 85% has been measured for the discharge of 1.6 kA from the co
il to a linear resistive load in the range of 40-400 mOMEGA.