Accession Number : ADA019306

Title :   A Portable Calorimetry System for Calibration of Nuclear Weapon Simulator Dosimetry.

Descriptive Note : Technical rept.,


Personal Author(s) : Pfeffer,Robert L. ; Lux,Robert A. ; Kronenberg,Stanley ; Berkowitz,Harry ; Van Gorden,Harry J.

Report Date : DEC 1975

Pagination or Media Count : 90

Abstract : An absolute dosimetry system was designed to determine the effect of differences between nuclear weapon simulator gamma-ray spectra and the spectra of standard calibration sources on the accuracy of simulator dosimetry systems. This system, employing a set of portable equilibrium calorimeters of widely differing composition, was constructed at ECOM, Fort Monmouth, NJ, and successfully tested at the Air Force Weapons Laboratory (AFWL), Transient Radiation Effects Facility (TREF), Albuquerque, NM. The test results were consistent with a calculated prediction of a 60% variation in deposited dose with atomic number characteristic of the gamma-ray spectra of TREF simulators. It is suggested that the output spectra of these machines be hardened via selective absorption of low energy photons by a layer of high atomic number material interposed between the faceplate and objects being exposed. The layer should be thick enough to yield a spectrum for which the variation of dose over atomic number is within the uncertainty of the dosimetry system used, permitting the use of any dosimetric materials. (Author)

Descriptors :   *Dosimeters, *Calorimeters, Nuclear explosion simulation, Gamma rays, Simulators, Calibration, Radiation absorption, Faceplates

Subject Categories : Nuclear Instrumentation

Distribution Statement : APPROVED FOR PUBLIC RELEASE