Experimental and theoretical evaluation of a fast-risetime, high current lightning indirect effects simulator

It is proposed that nuclear electromagnetic pulse generators with the front of the wave slowed down to 30 to 100 nanoseconds be used to supply a fast clean front of wave for indirect effects measurements of lightning coupling to digital avionics in full size aircraft. With the aid of coaxial return conductors, the approach also provides the fast radial electric field that may be of greater significance than previously believed. It is stressed that more realistic testing to provide these fast risetimes is especially important because of the increasing use of flight critical digital circuits and composite skins that have significantly reduced electromagnetic shielding.