Accession Number : AD0712603

Title :   STATISTICAL ANALYSIS OF SOLAR COSMIC RAY PROTON DOSE,

Corporate Author : MCDONNELL DOUGLAS ASTRONAUTICS CO-WEST HUNTINGTON BEACH CALIF

Personal Author(s) : Yucker,W. R.

Report Date : JUN 1970

Pagination or Media Count : 68

Abstract : The report describes the results of a statistical analysis of the radiation hazard to astronauts due to solar cosmic ray protons. While several similar studies have been conducted in the past, some objections to the use of this approach to determining shielding requirements have been raised due to the limited number of solar proton events for which data are available. More recent data are incorporated into the present analysis, including events from 1956 to 1969, in order to improve the accuracy of the predicted mission fluence and dose. Also, an attempt is made to present a unified and consistent view of the solar cosmic ray proton hazard and to justify the application of a statistical approach for mission planning purposes. Mission fluence and dose versus shield thickness data are presented for mission lengths up to 3 years during periods of maximum and minimum solar activity, and corresponding to various levels of confidence that the predicted hazard will not be exceeded. (Author)

Descriptors :   (*SOLAR RADIATION, COSMIC RAYS), (*MANNED SPACECRAFT, *RADIATION HAZARDS), SHIELDING, STATISTICAL ANALYSIS, MATHEMATICAL PREDICTION, PROTONS, EXPERIMENTAL DATA, DOSE RATE, ACCURACY, SOLAR DISTURBANCES, SAFETY, INTERPLANETARY TRAJECTORIES, ORBITS

Subject Categories : Astrophysics
      Radiobiology
      Astronautics

Distribution Statement : APPROVED FOR PUBLIC RELEASE