Speaker
Description
SAPPHIRE-2S is a novel model developed over several years which concerns Solar Energetic Particle (SEP) particle radiation and is the extension of the Solar Accumulated and Peak Proton and Heavy Ion Radiation Environment (SAPPHIRE) model. SAPPHIRE-2S is the first publicly available SEP climate specification model offering as base output solar particle flux time-series. The time-series outputs are spectrally and statistically coherent across all solar particles species included in the model, protons, electrons, helium and heavy ions(Z=[3,92]), and across the large energy ranges the model covers, 40keV-900 MeV/nuc for protons helium and heavy ions, and 40keV-5MeV for electrons. SAPPHIRE-2S can provide outputs for timespans ranging from ~1 month to arbitrarily large periods of several decades, for both solar active and solar quiet conditions, and this includes the capability to define severe SEP event environments beyond what has been observed in the space age. The model allows for probabilistic estimations of SEP radiation at any confidence level for the base output of time-series as well as any synoptic output, such as cumulative fluence and peak flux, which is directly derived from the time-series. Thus, SAPPHIRE-2S is an SEP climate model which can create short and long term scenarios of SEP radiation which are used for mission specification while the time-series output allows for the analysis of radiation effects, such as total dose, single events and detector interference, on a previously unavailable level of detail. Furthermore, the model allows the direct and detailed coupling with magnetospheric shielding for missions which will fly partially or entirely inside the Earth’s radiation belts wherein SEP intensities are attenuated. Finally, SAPPHIRE-2S has been coupled with state-of-the-art physics-based model simulations for particle propagation and transport, such as PARADISE, so as to be able to provide outputs for helioradial distances other than 1 AU, allowing for heliospheric SEP climate probabilistic modelling covering the region from the orbit of Mercury at 0.4AU out to the Kronian orbit region at 9.5 AU. The model builds on many years of work to process and cross-calibrate underlying data which led to the creation of the ESA proton and helium Reference Dataset (RDS) and it also incorporates newly curated cleaned and cross-calibrated data concerning low energy (E<5 MeV) solar protons, helium and heavy ions, as well as solar electrons from the ACE, IMP8, and SOHO missions for all SEP events from 1974 to 2017.
| Do you plan to attend in-person or online? | In-person |
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