= ee Project 6.5- Analysis of Electromagnetic Pulse Produced by Nuclear Explosion — Charles J. Ong OBJECTIVE The objective of Project 6.5 is to obtain waveforms of the electromagnetic radiation for all the detonations during Operation REDWING, This data is to be used in connection with a continuing study relating the waveform parameters to the height and yield of the detonation. INSTRUMENTATION Two identical stations are used to record data, one at Eniwetok and one at Kwajalein. 4 The instrumentation consists of a wide-band receiver with separate outputs connected to each of the three oscilloscopes. Mounted on each oscilloscope is a Polaroid Land Camera for recording the transient display. The wide-band receiver consists of one primary and four secondary cathode follower amplifiers. An antenna, frequency insensitive in the range of interest is fed directly into the primary cathode follower, The primary cathode follower is then connected to four individual cathode followers by a 50-ohm coaxial cable. Only three secondary cathode followers are utilized, the fourth serving as a spare. The number one and two cathode followers feed oscilloscopes with sweep speeds of approximately 30 micro-seconds per centimeter and 10 microseconds/centimeter respectively, The number three cathode follower is connected to the third oscilloscope through a 2 micro-second delay line. The third oscilloscope has a sweep speed of 1.0 micro-seconds/centimeter, DReRs : p- “\ 4