مورد إلكتروني
Space Particle Hazard Measurement and Modeling
| العنوان: | Space Particle Hazard Measurement and Modeling |
|---|---|
| المصدر: | DTIC |
| بيانات النشر: | 2007-11-30 |
| تفاصيل مُضافة: | AIR FORCE RESEARCH LAB HANSCOM AFB MA Metcalf, James Albert, Jay Brautigam, Donald Ginet, Gregory Golightly, Michael Knorring, Christine Lai, Shu Murad, Edmund Young, Shawn |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | This report describes R&D to measure and model the near-earth space environment and the effects of the environment on spacecraft in orbit. Data from two Compact Environmental Anomaly Sensors (CEASE) were analyzed to derive flux spectra of energetic particles. Data from CEASE were also used to create maps of proton fluxes in the South Atlantic Anomaly at multiple altitudes between 400 and 1650 km. A new approach to modeling the diffusion of energetic electrons in the radiation belts was developed. This approach uses a coordinate transformation that eliminates the mathematically difficult coefficients of cross-diffusion in pitch angle and momentum that appear in the conventional diffusion equation. MHD modeling was used to study trapping and detrapping of solar energetic protons in the magnetosphere. Environmental effects on spacecraft were investigated, primarily using data from satellites operated by Los Alamos National Laboratory. Effects included surface charging, deep dielectric charging, and micrometeoroid impacts. The research determined the critical temperature for spacecraft charging, which is a characteristic of each surface material. Other effects studied were the role of spacecraft spin in charging, the effects of emitted electron beams on spacecraft, and charge mitigation methods. |
| مصطلحات الفهرس: | Astrophysics, Nuclear Physics & Elementary Particle Physics, Unmanned Spacecraft, HAZARDS, SPACE ENVIRONMENTS, CHARGED PARTICLES, MEASUREMENT, INTERACTIONS, MAGNETOSPHERE, RADIATION BELTS, MAGNETOHYDRODYNAMICS, ELECTRON BEAMS, TRAPPING(CHARGED PARTICLES), MODELS, SPACECRAFT, ENERGETIC ELECTRONS, ENERGETIC PROTONS, SPACECRAFT CHARGING, SOUTH ATLANTIC ANOMALY, PROTON FLUXES, CHARGE MITIGATION, ENERGETIC PARTICLES, SOLAR PARTICLES, PE62101F, WUAFRL1010RSA1, Text |
| URL: | |
| الإتاحة: | Open access content. Open access content Approved for public release; distribution is unlimited. |
| ملاحظة: | text/html English |
| أرقام أخرى: | DTICE ADA476803 832007141 |
| المصدر المساهم: | From OAIster®, provided by the OCLC Cooperative. |
| رقم الأكسشن: | edsoai.ocn832007141 |
| قاعدة البيانات: | OAIster |
| الوصف غير متاح. |