Spacecraft Radiation Protection Training
Spacecraft Radiation Protection Training Course Description
This two-day Spacecraft Radiation Protection Training provides an in-depth overview of risks posed by radiation to spacecraft and working solutions minimizing those risks. Students will gain a solid understanding of the radiation environment, its measurement, its effects and effective mitigation strategies.
• What the models are for space environments, where to find them, how to use them.
• What the common radiation units mean.
• How to equate damage from different species of radiation.
• How to conduct total dose test.
• How to conduct SEE tests.
• How to use dose-depth curves in determining shield thickness.
• How to shield neutrons.
With onsite Training, courses can be scheduled on a date that is convenient for you, and because they can be scheduled at your location, you don’t incur travel costs and students won’t be away from home. Onsite classes can also be tailored to meet your needs. You might shorten a 5-day class into a 3-day class, or combine portions of several related courses into a single course, or have the instructor vary the emphasis of topics depending on your staff’s and site’s requirements.
Space Radiation Environment. Trapped protons and electrons. Solar energetic particles. Cosmic rays. Neutrons and gamma rays from Radioactive Thermoelectric Generators (RTGs). Secondary neutrons from large space structures. Mars surface and high altitude Earth enironment.
Total Dose and Effects. Energy per unit mass. Units–rads, REMs, Grey, Sieverts. Ionization effects. Charge deposition, migration and collection. Effects on digital and analog MOS and bipolar devices including ELDRS. Annealing, recovery, rebound.
Displacement Damage. Crystalline lattice deformations. Damage thresholds in silicon and gallium arsenide. Damage equivalence and NIEL. Effects of protons and neutrons on solar cells and detectors such as CCDs. Dark current, charge transfer efficiency, maximum power degradation.
Single Event Effects. Ionization by primary particles and secondaries from nuclear collisions. Charge collection in small structures. Effects in digital and analog devices. Transient and permanent upsets, soft errors, latch-up, burn-out, SEFI. Volatile and non-volatile memories, micro and signal processors, DC/DC converters, optoelectronics.
Testing and Mitigation Techniques. Total dose testing. SEE testing. Facilities. Shielding. Derating. Conservative circuit design. Systems mitigation. EDAC, latch-up protection circuitry, watch dog timers, autonomy.
Human Effects. Long duration exposure in low Earth orbit and interplanetary transport vehicles. Threat of high-energy neutrons to astronauts. Effects in tissue and organs. Dose Equivalent and weighting factors. Risk of carcinogenesis, DNA damage. CNS effects.
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