Contribution Of High Charge And Energy Hze Ions During Solar Particle Event Of September 29 1989 PDF Download
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Author | : Myung-Hee Y. Kim |
Publisher | : |
Total Pages | : 24 |
Release | : 1999 |
Genre | : Shielding (Radiation) |
ISBN | : |
Download Contribution of High Charge and Energy (HZE) Ions During Solar-Particle Event of September 29, 1989 Book in PDF, ePub and Kindle
Author | : National Aeronautics and Space Administration (NASA) |
Publisher | : Createspace Independent Publishing Platform |
Total Pages | : 34 |
Release | : 2018-06-15 |
Genre | : |
ISBN | : 9781721183920 |
Download Contribution of High Charge and Energy (Hze) Ions During Solar-Particle Event of September 29, 1989 Book in PDF, ePub and Kindle
The solar-particle event (SPE) of September 29, 1989, produced an iron-rich spectrum with energies approaching 1 A GeV with an approximate spectral slope parameter of 2.5. These high charge and energy (HZE) ions challenge conventional methods of shield design and assessment of astronaut risks. In the past, shield design and risk assessment have relied on proton shielding codes and biological response models derived from X-ray and neutron exposure data. Because the HZE spectra decline rapidly with energy and HZE attenuation in materials is limited by their penetration power, details of the mass distributions about the sensitive tissues (shielding materials and the astronaut's body) are important determining factors of the exposure levels and distributions of linear energy transfer. Local tissue environments during the SPE of September 29, 1989, with its f= components are examined to analyze the importance of these ions to human SPE exposure. Typical space suit and lightly shielded structures leave significant contributions from HZE components to certain critical body tissues and have important implications on the models for risk assessment. A heavily shielded equipment room of a space vehicle or habitat requires knowledge of the breakup of these ions into lighter components, including neutrons, for shield design specifications. Kim, Myung-Hee Y. and Wilson, John W. and Cucinotta, Francis A. and Simonsen, Lisa C. and Atwell, William and Badavi, Francis F. and Miller, Jack Johnson Space Center; Langley Research Center NASA/TP-1999-209320, L-17744, NAS 1.60:209320
Author | : |
Publisher | : |
Total Pages | : |
Release | : 1999* |
Genre | : |
ISBN | : |
Download Contribution Of High Charge And Energy (HZE) Ions During Solar-Praticle Event Of September 29, 1989... NASA/TP-1999-209320... August 6, 1999 Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 182 |
Release | : 2000 |
Genre | : Astronautics |
ISBN | : |
Download NASA Langley Scientific and Technical Information Output: 1999 Book in PDF, ePub and Kindle
Author | : National Research Council |
Publisher | : National Academies Press |
Total Pages | : 132 |
Release | : 2008-06-29 |
Genre | : Science |
ISBN | : 0309113830 |
Download Managing Space Radiation Risk in the New Era of Space Exploration Book in PDF, ePub and Kindle
As part of the Vision for Space Exploration (VSE), NASA is planning for humans to revisit the Moon and someday go to Mars. An important consideration in this effort is protection against the exposure to space radiation. That radiation might result in severe long-term health consequences for astronauts on such missions if they are not adequately shielded. To help with these concerns, NASA asked the NRC to further the understanding of the risks of space radiation, to evaluate radiation shielding requirements, and recommend a strategic plan for developing appropriate mitigation capabilities. This book presents an assessment of current knowledge of the radiation environment; an examination of the effects of radiation on biological systems and mission equipment; an analysis of current plans for radiation protection; and a strategy for mitigating the risks to VSE astronauts.
Author | : National Research Council |
Publisher | : National Academies Press |
Total Pages | : 86 |
Release | : 2012-04-19 |
Genre | : Science |
ISBN | : 0309253055 |
Download Technical Evaluation of the NASA Model for Cancer Risk to Astronauts Due to Space Radiation Book in PDF, ePub and Kindle
NASA's current missions to the International Space Station (ISS) and potential future exploration missions involving extended stays by astronauts on the lunar surface, as well as the possibility of near- Earth object (NEO) or Mars missions, present challenges in protecting astronauts from radiation risks. These risks arise from a number of sources, including solar particle events (SPEs), galactic cosmic rays (GCRs), secondary radiation from surface impacts, and even the nuclear isotope power sources transported with the astronauts. The serious early and late radiation health effects potentially posed by these exposures are equally varied, ranging from early signs of radiation sickness to cancer induction. Other possible effects include central nervous system damage, cataracts, cardiovascular damage, heritable effects, impaired wound healing, and infertility. Recent research, much of which has been sponsored by NASA, has focused on understanding and quantifying the radiation health risks posed by space radiation environments. Although many aspects of the space radiation environments are now relatively well characterized, important uncertainties still exist regarding biological effects and thus regarding the level and types of risks faced by astronauts. This report presents an evaluation of NASA's proposed space radiation cancer risk assessment model, which is described in the 2011 NASA report, Space Radiation Cancer Risk Projections and Uncertainties-2010. The evaluation in Technical Evaluation of the NASA Model for Cancer Risk to Astronauts Due to Space Radiation considers the model components, input data (for the radiation types, estimated doses, and epidemiology), and the associated uncertainties. This report also identifies gaps in NASA's current research strategy for reducing the uncertainties in cancer induction risks.
Author | : M. Alexander |
Publisher | : |
Total Pages | : 122 |
Release | : 2001 |
Genre | : Mars (Planet) |
ISBN | : |
Download Mars Transportation Environment Definition Document Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 658 |
Release | : 2000 |
Genre | : Government publications |
ISBN | : |
Download Monthly Catalog of United States Government Publications Book in PDF, ePub and Kindle
Author | : Isabel F. Gonçalves |
Publisher | : |
Total Pages | : 666 |
Release | : 2005 |
Genre | : Shielding (Radiation) |
ISBN | : |
Download Radiation Protection and Shielding Book in PDF, ePub and Kindle
Author | : Paul Song |
Publisher | : American Geophysical Union |
Total Pages | : 460 |
Release | : 2001-01-09 |
Genre | : Science |
ISBN | : |
Download Space Weather Book in PDF, ePub and Kindle
Space weather is considered to be conditions on the Sun and in the solar wind, magnetosphere, ionosphere, and thermosphere that can influence the reliability and performance of space-borne or ground- based technological systems. Song (environmental earth and atmospheric sciences, U. of Massachusetts), Singer (Space Environment Center, National Oceanic and Atmospheric Administration), and Siscoe (Center for Space Physics, Boston U.) present 50 articles on current understanding and advances in the description and prediction of space weather. Nine of the articles, accessible to non-specialists, touch upon broad issues of space weather in the area of technology, science, industry, and commerce. The remaining articles are geared more towards the scientific community and address the sun and its influence on space weather, specification and prediction of the magnetosphere, and specification and prediction of the ionosphere and thermosphere. Annotation copyrighted by Book News, Inc., Portland, OR.