. - om 210 ' ay ioe Project 6.5 = Analysis of Electromagnetic Pulse Produced by ituclear Explosion - C. J, Ong OSIRCTING The objective of Project 6.5 is to obtain waveforms of the electromagnetic radiation for all tre jetonations during Operation REDWING. This data is to be used in connection with s continuing study relating the waveform parameters to the height and yield of the detonation, EATATL Two identical stations are used to record data, one at Rnivetok and one at Kvajelein. The instrumentation consists of s wide-band receiver with separate out— puta connected to each of the three oscilloscopes. Y.cunted on each oscilloscope is a Poleroid Land Cazerea for recording the transient display. The wide-band receiver consiste of one primary and four secondary cathode follower amplifiers. An antenna, frecuency 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 trree secondary cathode followers are utilised, the fourth serving as a apere. The number one and two cathode followers feed oscilloscopes with sveep ‘speeds of approximately 30 aicroseconds per centimeter cnd 10 sicroseconds/ centimeter respectively. The number three cathode follower is connected to the third osailloscope through a 2 microsecond delay line. The third oseilleecops has a sweep speed of 1,0 sicroseconde/centimeter, Al) cecilloscopea vere triggered aisultanecusly by the DC trigger device located BEST AVAILABLE COPY ~3~- COMERS. a