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Absolute determination of bremsstrahlung deposition (Hydra).

Author
Lockwood, G. J.
Published
United States : [publisher not identified], 1975.
[Oak Ridge, Tennessee] : [U.S. Atomic Energy Commission], 1975.
Physical Description
microfiche : negative ; 11 x 15 cm
Additional Creators
Miller, G. H.

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Summary
A technique developed to measure electron energy deposition in metals has been applied to the determination of bremmstrahlung deposition. In this method a square-wave beam modulation is employed and the time-derivative of a calorimeter temperature is used to obtain the energy deposited. This paper presents the results of bremsstrahlung deposition measurements in gold and aluminum. Data are presented for dose to a material as a function of converter material, converter thickness, and angle of electron incidence for electron energies in the range from 0.2 to 1.0 MeV. In addition, measurements of dose as a function of calorimeter position as it was moved both laterally and axially with respect to the beam axis are reported. Utilizing the facility and technique developed to make these measurements, a thorough study of the bremsstrahlung measuring calorimeters used with the pulsed electron beam machine Hydra was accomplished. The goal of this study was to determine accurately the correction factor for the loading effect of the thermocouple wires. The loading correction factor was measured to be 1.72 with an uncertainty of +- 5 percent. This value should be used when determining true dose to gold with the standard Hydra calorimeters instead of the value of 1.5 obtained from data on Hydra, since there is a larger uncertainty in the latter value.
Report Numbers
SAND-75-0005
Other Subject(s)
Collection
U.S. Atomic Energy Commission depository collection.
Note
DOE contract number: AT(29-1)-789
NSA number: NSA-32-021342
OSTI Identifier 4168928
Research organization: Sandia Labs., Albuquerque, NM (United States).
Funding Information
Sponsored by US Energy Research and Development Administration (ERDA).
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