Fully Energy Dependent Hzetrn PDF Download
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Author | : Judy L. Shinn |
Publisher | : |
Total Pages | : 24 |
Release | : 1992 |
Genre | : |
ISBN | : |
Download Fully Energy-dependent HZETRN (a Galactic Cosmic-ray Transport Code) Book in PDF, ePub and Kindle
Author | : National Aeronautics and Space Adm Nasa |
Publisher | : Independently Published |
Total Pages | : 38 |
Release | : 2019 |
Genre | : Science |
ISBN | : 9781792736865 |
Download Fully Energy-Dependent Hzetrn (a Galactic Cosmic-Ray Transport Code) Book in PDF, ePub and Kindle
For extended manned space missions, the radiation shielding design requires efficient and accurate cosmic-ray transport codes that can handle the physics processes in detail. The Langley Research Center galactic cosmic-ray transport code (HZETRN) is currently under development for such design use. The cross sections for the production of secondary nucleons in the existing HZETRN code are energy dependent only for nucleon collisions. The approximation of energy-independent, heavy-ion fragmentation cross section is now removed by implementing a mathematically simplified energy-dependent stepping formalism for heavy ions. The cross section at each computational grid is obtained by linear interpolation from a few tabulated data to minimize computing time. Test runs were made for galactic cosmic-ray transport through a liquid hydrogen shield and a water shield at solar minimum. The results show no appreciable change in total fluxes or computing time compared with energy-independent calculations. Differences in high LET (linear energy transfer) spectra are noted, however, because of the large variation in cross sections at the low-energy region. The high LET components are significantly higher in the new code and have important implications on biological risk estimates for heavy-ion exposure. Shinn, Judy L. and John, Sarah and Tripathi, Ram K. and Norbury, John W. and Wilson, John W. and Townsend, Lawrence W. Langley Research Center NASA-TP-3243, L-17103, NAS 1.61:3243 RTOP 593-42-21-01...
Author | : Judy L. Shinn |
Publisher | : |
Total Pages | : 15 |
Release | : 1992 |
Genre | : Galactic cosmic rays |
ISBN | : |
Download Fully Energy-dependent HZETRN Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 52 |
Release | : 1991 |
Genre | : Cross sections (Nuclear physics) |
ISBN | : |
Download HZETRN Book in PDF, ePub and Kindle
Author | : Francis A. Cucinotta |
Publisher | : |
Total Pages | : 56 |
Release | : 2003 |
Genre | : Galactic cosmic rays |
ISBN | : |
Download Physics of the Isotopic Dependence of Galactic Cosmic Ray Fluence Behind Shielding Book in PDF, ePub and Kindle
Author | : Judy L. Shinn |
Publisher | : |
Total Pages | : 26 |
Release | : 1992 |
Genre | : Cross sections (Nuclear physics) |
ISBN | : |
Download An Efficient HZETRN Book in PDF, ePub and Kindle
Author | : John William Wilson |
Publisher | : |
Total Pages | : 152 |
Release | : 1995 |
Genre | : Cross sections (Nuclear physics) |
ISBN | : |
Download HZETRN Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 372 |
Release | : 1994 |
Genre | : Aeronautics |
ISBN | : |
Download Scientific and Technical Aerospace Reports Book in PDF, ePub and Kindle
Author | : John William Wilson |
Publisher | : |
Total Pages | : 52 |
Release | : 1991 |
Genre | : |
ISBN | : |
Download HZETRN: A Heavy Ion/nucleon Transport Code for Space Radiations Book in PDF, ePub and Kindle
Author | : John W. Norbury |
Publisher | : |
Total Pages | : 50 |
Release | : 2002 |
Genre | : Extraterrestrial radiation |
ISBN | : |
Download Cross-Section Parameterizations for Pion and Nucleon Production From Negative Pion-Proton Collisions Book in PDF, ePub and Kindle