A New Model of Outer Belt Electrons for Dielectric Internal Charging (MOBE-DIC)

作者：Hands Alex^*; Ryden Keith; Underwood Craig; Rodgers David; Evans Hugh

来源：IEEE Transactions on Nuclear Science, 2015, 62(6): 2767-2775.

DOI：10.1109/TNS.2015.2475134

• Giove spacecraft
• internal charging
• trapped electron flux
• Van Allen belts

The outer electron belt poses a significant radiation hazard to spacecraft due to internal charging and dose effects. We present a new user-friendly model to characterise the worst-case environment built on data from the Giove-A spacecraft. We use instrument data based on a novel technique of direct charging current measurements, uncontaminated by protons and unaffected by dead-time, to create the model. The model provides integral or differential electron flux spectra with the following input parameters: percentile 90%, 99% or 100%; L-shell range 3-8; Magnetic Latitude () range 1-100; Energy range 0.5-3 MeV. Comparisons with other models and independent data sets show that our "Model of Outer Belt Electrons for Dielectric Internal Charging" (MOBE-DIC) provides a sound worst-case specification for mission planners and design engineers. We find that, in medium Earth orbit particularly, MOBE-DIC indicates a harder electron spectrum than either AE9 or FLUMIC.

• 出版日期2015-12