Analysis of Stray Radiation Produced by the Advance Light Source (1.9 GeV Synchrotron Radiation Source) at Lawrence Berkeley Laboratory Public Deposited

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  • February 28, 2019
  • Ajemian, Robert C.
    • Affiliation: Gillings School of Global Public Health, Department of Environmental Sciences and Engineering
  • The yearly environmental dose equivalent likely to result at the closest site boundary from the Advanced Light Source was determined by generating multiple linear regressions. The independent variables comprised quantified accelerator operating parameters and measurements from synchronized, in-close (outside shielding prior to significant atmospheric scattering), state-of-the-art neutron remmeters and photon G-M tubes. Neutron regression models were more successful than photon models due to lower relative background radiation and redundant detectors at the site boundary. As expected, Storage Ring Beam Fill and Beam Crashes produced radiation at a higher rate than gradual Beam Decay; however, only the latter did not include zero in its 95% confidence interval. By summing for all three accelerator operating modes, a combined yearly DE of 43 mRem/yr with a 90% CI of (0.04-8.63) was obtained. These results fall below the DOE reporting level of 10 mRem/year and suggest repeating the study with improved experimental conditions.
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Rights statement
  • In Copyright
  • Loomis, Dana P.
  • Crawford-Brown, Douglas J.
  • Watson, James E.
  • Master of Science in Public Health
Academic concentration
  • Industrial Hygiene
Degree granting institution
  • University of North Carolina at Chapel Hill
Graduation year
  • 1995
Deposit record
  • 043fb25a-cea5-4ac2-b0d3-5af4a220fe28

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