A Tree-Test Facility Gamma-Ray Spectrum Analyzer.
Abstract
A gamma-ray spectrograph was developed for use in the flash x-ray facility at the Air Force Special Weapons Center. The spectrograph consists of a flat semi-circular beta-ray spectrograph housed in a thick-walled box (casket) to provide the necessary shielding. Precision tapered lead collimators define a gamma-ray beam. A beryllium foil placed at the source point of the beta-ray spectrograph converts some of the gamma-rays to Compton electrons. Solid-state detectors in an integral mode detect the number of electrons. Charge-sensitive preamplifiers were obtained with a linear response to 25 GeV and the signals were shaped and delayed 1 s inside the casket to reduce RF interference. The spectrograph was delivered and an on-site test proved that the instrument meets the requirement for a spectrum analyzer at the facility. The on-site test also provided the opportunity to optimize shielding and to make preliminary spectrum measurements. Two special channels were provided and evaluated for very-high-intensity or time-dependent studies. A Moxon-Rae detector was tested and proved to be an excellent method for determining dose rate as a function of time. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1970
- Accession Number
- AD0866831
Entities
People
- E. J. Kaufman
- J. C. Saccenti
- J. E. Youngblood
- T. J. Rock
- W. R. Van Antwerp