Computer Analysis of Radiation Shielding

Item

Title
Computer Analysis of Radiation Shielding
Date
1964
Index Abstract
Not Available
Photo Quality
Not Needed
Report Number
AMRL TDR 64-11
Creator
Fortney, R. E.
Corporate Author
Northrop Space Laboratories
Laboratory
Biophysics Laboratory
Extent
97
PB Number
PB125081
Identifier
AD0435737
Access Rights
OTS
Distribution Classification
1
Contract
AF 33(657)-8762
DoD Project
6301
DoD Task
630101
DTIC Record Exists
No
Distribution Change Authority Correspondence
None
Distribution Conflict
No
Cover Price
2.25
Abstract
The purpose of this study was to develop mathematical methods to assess the biological hazards of space radiation and to program these methods for the IBM 7090 using FORTRAN language. A semianalytical approach was utilized to write machine programs for geocentric trajectories and a model astronaut inside a space vehicle. The trajectory program is used to solve the two body problem with pertubations to correct for the oblateness of the earth. The earth's magnetosphere is the space of principle interest for lunar missions, therefore lunar impact and return trajectories are considered to be two body geocentric orbits. An astronaut's head and torso are represented by two right elliptical cylinders. This model is placed inside a mathematically described space vehicle with known thicknesses in designated areas. An existent mahine program was utilized to define the radiative environment in McIlwain (B,L) coordinates and supplemental computer programs were used to determine radiation doses resulting from electron and proton environments. Results from the CARS program are obtained with a small amount of maching time. For example, one tenth (.1) of an hour was required to determine the radiation dose due to two spectra (electrons and protons) at ten points in the model astronaut within the APOLLO Command Module (CM) for a given orbital mission.
Report Availability
Full text available
Date Issued
1964-02
Provenance
RAF Centre of Aviation Medicine
Type
report
Format
1 online resource
Media
AMRLTDR64-011.pdf