Weapons Instrumentation
Abstract
Measurements have been made to determine the frequency response and time delay of the NRL high-current photo-multiplier. Measurements were made of the transit time differences in transit time were found to be not more than 1.3 x 10(-9) seconds and it is believed that this figure is partially set by the accuracy of the equipment and experimental technique. In order to check further the response of the high-current tube, the cathodes of a high-current tube and a type 935 photodiode were illuminated with a common light source and the output current pulses were displayed directly on a TW-10 cathode-ray tube. Because of the physical characteristics of the type 935 photodiode its transit time spread should be in the region of 1 x 10(-9) seconds or less. The pulse observed from both tubes were identical and had a rise time of 8 x 10(-9) seconds. From these measurements it is estimated that the total time spread of the high-current photomultiplier, due to transit time, unterminated reflections and lead length, is not greater than approximately 3 x 10^-9 seconds.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 31, 1954
- Accession Number
- AD1222133
Entities
People
- C. B. Dobbie
- J. D. Shipman
- Jacob H. Miller
- M. R. Mccraven
- R. V. Talbot
Organizations
- United States Naval Research Laboratory