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thick galactic cosmic radiation shielding using atmospheric dataNASA is concerned with protecting astronauts from the effects of galactic cosmic radiation and has expended substantial effort in the development of computer models to predict the shielding obtained from various materials. However, these models were only developed for shields up to about 120 g!cm2 in thickness and have predicted that shields of this thickness are insufficient to provide adequate protection for extended deep space flights. Consequently, effort is underway to extend the range of these models to thicker shields and experimental data is required to help confirm the resulting code. In this paper empirically obtained effective dose measurements from aircraft flights in the atmosphere are used to obtain the radiation shielding function of the earth's atmosphere, a very thick shield. Obtaining this result required solving an inverse problem and the method for solving it is presented. The results are shown to be in agreement with current code in the ranges where they overlap. These results are then checked and used to predict the radiation dosage under thick shields such as planetary regolith and the atmosphere of Venus.
Document ID
20130014272
Document Type
Reprint (Version printed in journal)
Authors
Youngquist, Robert C.
(NASA Kennedy Space Center Cocoa Beach, FL, United States)
Nurge, Mark A.
(NASA Kennedy Space Center Cocoa Beach, FL, United States)
Starr, Stanley O.
(NASA Kennedy Space Center Cocoa Beach, FL, United States)
Koontz, Steven L.
(NASA Johnson Space Center Houston, TX, United States)
Date Acquired
August 27, 2013
Publication Date
January 1, 2013
Subject Category
Space Transportation and Safety
Report/Patent Number
KSC-2013-125
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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