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A Study of the Radiation Environment on Board the Space Shuttle Flight Sts-57

A Study of the Radiation Environment on Board the Space Shuttle Flight Sts-57


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About the Book

A joint NASA-Russian study of the radiation environment inside a SPACEHAB 2 locker on space shuttle flight STS-57 was conducted. The shuttle flew in a nearly circular orbit of 28.5 deg inclination and 462 km altitude. The locker carried a charged particle spectrometer, a tissue equivalent proportional counter (TEPC), and two area passive detectors consisting of combined NASA plastic nuclear track detectors (PNTD's) and thermoluminescent detectors (TLD's), and Russian nuclear emulsions, PNTD's, and TLD's. All the detector systems were shielded by the same shuttle mass distribution. This makes possible a direct comparison of the various dose measurement techniques. In addition, measurements of the neutron energy spectrum were made using the proton recoil technique. The results show good agreement between the integral LET spectrum of the combined galactic and trapped particles using the tissue equivalent proportional counter and track detectors between about 15 keV/micron and 200 keV/micron. The LET spectrum determined from nuclear emulsions was systematically lower by about 50%, possibly due to emulsion fading. The results show that the TEPC measured an absorbed dose 20% higher than TLD's, due primarily to an increased TEPC response to neutrons and a low sensitivity of TLD's to high LET particles under normal processing techniques. There is a significant flux of high energy neutrons that is currently not taken into consideration in dose equivalent calculations. The results of the analysis of the spectrometer data will be reported separately. Badhwar, G. D. and Atwell, W. and Benton, E. V. and Frank, A. L. and Keegan, R. P. and Dudkin, V. E. and Karpov, O. N. and Potapov, V. and Akopova, A. B. and Magradze, N. V. Johnson Space Center


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Product Details
  • ISBN-13: 9781729145456
  • Publisher: Independently Published
  • Publisher Imprint: Independently Published
  • Height: 280 mm
  • No of Pages: 28
  • Weight: 91 gr
  • ISBN-10: 1729145450
  • Publisher Date: 23 Oct 2018
  • Binding: Paperback
  • Language: English
  • Spine Width: 2 mm
  • Width: 216 mm


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