Accession Number : AD0435603

Title :   EFFECTS OF NEUTRON AND GAMMA RAY SPECTRA ON FLIGHT CONTROL SYSTEMS.

Descriptive Note : Rept. for Jan 63-Mar 64,

Corporate Author : LITTON SYSTEMS INC WOODLAND HILLS CALIF

Personal Author(s) : Kaufman,Alvin B. ; Newhoff,Harry R. ; Gaz,Richard A.

Report Date : FEB 1964

Pagination or Media Count : 137

Abstract : This report deals with the program on Effects of Neutron and Gamma Ray Spectra on Flight Control Systems. The program encompassed theoretical and experimental tasks in which neutron and gamma ray spectra, dose rate, and neutron-gamma ratios were studied to determine their relative importance in predicting radiation damage to flight control systems in nuclear environments of advanced aerospace vehicles. Six different nuclear facilities were utilized for the radiation tests. Three of the reactors were steady state and three were pulse type. Each reactor produced a distinct spectrum and dose rate signature which was as fully defined as the state of the art permits. The empirical phase of the program was performed with 18 transistor gyro preamplifiers. These were divided into sets of three and each set was tested at 55 C in one of the six nuclear reactors. In addition, and concurrently, eight field effect transistors were exposed in each environmental test, inasmuch as insignificant permanent damage to the amplifiers was expected in the pulse irradiations and this otherwise would limit the extent of spectra-damage comparison. (Author)

Descriptors :   (*NEUTRON SPECTRUM, FLIGHT CONTROL SYSTEMS), (*FLIGHT CONTROL SYSTEMS, NEUTRON SPECTRUM), (*GAMMA RAY SPECTRA, FLIGHT CONTROL SYSTEMS), DOSE RATE, THEORY, DAMAGE, RADIATION EFFECTS, TRANSISTOR AMPLIFIERS, RADIATION HAZARDS, NUCLEAR REACTORS

Distribution Statement : APPROVED FOR PUBLIC RELEASE