PROTOTYPE OF A PORTABLE MICROCALORIMETER FOR MEASUREMENT OF ABSORBED DOSE,
Abstract
A prototype of a compact, portable microcalorimeter was built which measures ionizing radiation dose rates as low as 3 aluminum rads/min. The absorber and temperature sensing system are similar to those described in USNRDL-TR621, but the temperature controlled bath described therein has been replaced by an aluminum isothermal shield bolted to the bottom surface of a copper reservoir containing liquid nitrogen. Both the shield and the reservoir are contained in a vacuum chamber. Calibration of the absorber is accomplished by observing the response of an imbedded thermistor when the calorimeter is placed in a gamma-ray field of known exposure level provided by a 200-curie Co60 source. Plans are presented for extending this method of temperature control to a smaller microcalorimeter (outside diameter 2.25 in.) which will increase the portability and minimize attenuation of the radiation field. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 06, 1964
- Accession Number
- AD0433633
Entities
People
- E. R. Schleiger
- N. Goldstein
Organizations
- Naval Radiological Defense Laboratory