Table of Contents
Radiation Environments, IEEE NSREC Short Course
Session Objectives
Radiation Effects
Total Ionizing Dose
Single Event Effects
Displacement Damage
The Radiation Environment
Components of the Natural Environment
Outline
Sun: Dominates the Environment
Solar Wind
Corona
Solar Activity: Cyclic Variation
Sunspot Cycle
Solar Flares
Coronal Mass Ejections
Solar Wind Density & Velocity
Outline, Background, Earth’s Magnetosphere
The Magnetosphere
Earth’s Magnetosphere
Earth’s Magnetic Field
IGRF Magnetic Field Model
Internal & External Field Models
B-L Coordinate System - Dipole
Particle Penetration of the Magnetosphere
Magnetic Rigidity
Outline, Background, Space Weather
Magnetic Storms / Space Weather
Sunspot Cycle with Magnetic Storms
Magnetic Storm Phases
Magnetic Storm Phases (cont)
Plasmoid Model for Substorms
ANIK E1: Magnetic Storm
Early Warning: S-Curves
Satellite Detection System
Outline, Trapped Particles
Trapped Radiation
Van Allen Belts
Van Allen Belts
Trapped Particle Motions
Trapped - Van Allen Belts
Stable Trapping
Stable Does Not Mean Static
Variations - Protons
TIROS/NOAA Trapped Protons
CRRES - Measured Proton Belt
Variations - Electrons
Activity in the Slot Region - SAMPEX
Magnetic Storms - Hipparcos
Trapped Particle Modeling Program
AP-8 & AE-8 Models
AP-8 Model Fluxes vs. L
AE-8 Model Fluxes vs. L
Problems with AP-8 & AE-8
Problems with AP-8 - Protons
Problems with AE-8 - Electrons
Model Improvements: CRRES
CRRES - AF Phillips Lab SPD/GD
Trapped Proton Models
AE-8 MAX & CRRESELE
Model Improvements: Trapped Protons
Compare NOAAPRO to AP-8
Ratio: NOAAPRO/AP-8
Model Improvements: Other
AP8 - MAX Spectra
AE-8 - MAX Spectra
SRAM Upset Rates on CRUX/APEX
Measured Upsets on Hitachi 1M at 1500 km CRUX Upset Rates 1450-1550 km
Outline, Transient Particles, Galactic Cosmic Rays
Galactic Cosmic Ray Ions
GCRs: Nuclear Composition
GCRs: Solar Modulation
GCR Models
GCRs: Shielded Fluences - Fe (1)
GCRs: Shielded Fluences - Fe (2)
GCRs: Integral LET Spectra
GCR LET: CREME 96 - CREME 86
CREME 86 & CREME 96: GCRs
CREME 86 - CREME 96: GCRs
Outline, Transient Particles, Solar Particle Events
Solar Particle Events
Solar Particle Events
Gradual vs. Impulsive
Impulsive Events
Gradual Events
Solar Particle Events
Sunspot Cycle with Solar Proton Events
Solar Proton Event - October 1989
Proton Event Spectra - Cycle 22
Solar Proton Models - Total Dose
Solar Proton Models
Problems with Solar Proton Models: Dose & Degradation Applications
Solar Proton Models - SEEs
Solar Protons - SEEs
Solar Protons: Orbits
Solar Heavy Ions Models: SEEs
CREME 86 - CREME96 Solar Event Models
Effect of Shielding on Heavy Ions
SEU Rate Increases During Solar Events
SOHO/LASCO During Solar Particle Event
Particle Tracks in SOHO/LASCO
TIROS Measurement of Protons
TIROS Measurement of Protons
Solar Protons - Dose & Degradation
Solar Protons & Heavy Ions - SEEs
Comparison of Solar Heavy Ion Models
Outline, Atmospheric Neutrons
Particle Cascades in Atmosphere
Neutrons
Neutron Environment
Variations: Mostly Function of Cosmic Ray Levels
2 Models
Neutron Flux Measurements
Neutron Models: Flux vs. Altitude
Neutron Model: Flux vs. Latitude
Neutron Model: Flux vs. Energy
PPT Slide
Summary - Trapped Particles
Summary - GCRs
Summary - Solar Protons
Summary - Solar Heavier Ions
Neutrons
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