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the ionizing radiation environment of ldef prerecovery predictionsThe Long Duration Exposure Facility (LDEF) was exposed to several sources of ionizing radiation while in orbit. The principal ones were trapped belt protons and electrons, galactic cosmic rays, and albedo particles (protons and neutrons) from the atmosphere. Large solar flares in 1989 may have caused a small contribution. Prior to the recovery of the spacecraft, a number of calculations and estimates were made to predict the radiation exposure of the spacecraft and experiments. These were made to assess whether measurable radiation effects might exist, and to plan the analysis of the large number of radiation measurements available on the LDEF. Calculations and estimates of total dose, particle fluences, linear energy transfer spectra, and induced radioactivity were made. The principal sources of radiation is described, and the preflight predictions are summarized.
Document ID
19910015666
Document Type
Conference Paper
Authors
Watts, John W., Jr.
(NASA Marshall Space Flight Center Huntsville, AL., United States)
Derrickson, James H.
(NASA Marshall Space Flight Center Huntsville, AL., United States)
Parnell, T. A.
(NASA Marshall Space Flight Center Huntsville, AL., United States)
Fishman, G. J.
(NASA Marshall Space Flight Center Huntsville, AL., United States)
Harmon, A.
(NASA Marshall Space Flight Center Huntsville, AL., United States)
Benton, E. V.
(San Francisco Univ. CA., United States)
Frank, A. L.
(San Francisco Univ. CA., United States)
Heinrich, Wolfgang
(Siegen Univ.,, Germany F.R. , United States)
Date Acquired
September 6, 2013
Publication Date
June 1, 1991
Publication Information
Publication: NASA, Langley Research Center, First LDEF Post-Retrieval Symposium Abstracts
Subject Category
ATOMIC AND MOLECULAR PHYSICS
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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IDRelationTitle19910015658Analytic PrimaryFirst LDEF Post-Retrieval Symposium abstracts