From Nymik- COSPAR. SPE estimates from Artic Ice- Core Nitrate Samples.

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Presentation transcript:

From Nymik- COSPAR

SPE estimates from Artic Ice- Core Nitrate Samples

Large SPE’s

GCR and SPE Dose: Materials & Tissue GCR higher energy >> secondary radiation No Tissue Shielding With Tissue Shielding

Risk and Uncertainties increase with Linear Energy Transfer (LET) Dose = Flux x LET Biological Dose H = Dose X Q(L) REID = Risk of exposure induced death = H x R 0 (sex,age) 95% CL of Risk Model

Accuracy of Space Radiation Transport Models

Model vs. Phantom Expt. (STS and ISS) ISS Increment-2 results

Role of Dose-Rate and Shielding  Shielding mitigates most SPE events  High-energy component (>100 MeV) often poorly known  Proton biological damage is dependent on dose-rate  Effects increase above ~5 rad/hr EVA Today (Y/N?) IVA (time to storm shelter)

Long-Term Forecasting

LET vs TEPC TEPC model Vs TEPC (no TF)