Accession Number : AD0654690

Title :   A SURVEY OF METHODS FOR MEASUREMENTS OF RADIATION FIELDS FROM THE AFCRL LINEAR ACCELERATOR,

Corporate Author : CONTROLS FOR RADIATION INC CAMBRIDGE MASS

Personal Author(s) : Ozair,V.

Report Date : MAY 1967

Pagination or Media Count : 68

Abstract : The survey of methods for radiation monitoring is presented. It includes detailed explanation of various approaches for appropriate dosimetry of flux, energy spectra and dose rates of intense pulsed gamma rays and neutrons. Emphasis has been given on those methods which are better suited for measurements of pulsating mixed fields from the AFCRL linear accelerator. Instrumental methods of detection using gas detectors, scintillators and solid state crystals are described. The following methods: thermoluminescent and exoelectron dosimetry, photographic emulsions activation foils, threshold detectors and self powered detectors are also surveyed. These methods are compared for applications around the linear accelerator. As of now, it appears that thermoluminescent dosimetry is well suited for dose measurement of gamma radiation while photoneutron threshold reactions and photographic films can be applied for measurements of the gamma spectrum. Neutron measurements of flux and energy spectrum are best accomplished by activation foils and threshold detectors. Though these methods are not capable of very good precision, they have the important advantage of excellent discrimination against gamma radiation from a pulsating accelerator output. Thermoluminescent detectors, LiF types 6 and 7, can be applied to the measurement of thermal and fast fluxes as these phosphors are useful to differentiate neutrons in mixed fields. (Author)

Descriptors :   (*LINEAR ACCELERATORS, *RADIATION MEASURING INSTRUMENTS), GAMMA RAYS, DETECTION, GAMMA RAY SPECTROSCOPY, NUCLEAR RADIATION SPECTROMETERS, THERMOLUMINESCENCE, DOSIMETERS, NEUTRONS

Subject Categories : Nuclear Instrumentation
      Particle Accelerators
      Nuclear Physics & Elementary Particle Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE