Solar neutrino flare, megaton neutrino detectors and human space journey

TL;DR

This paper proposes using large neutrino detectors like Hyper-Kamiokande and IceCube-PINGU to detect solar flare neutrinos, providing early warnings for astronauts to protect themselves from lethal radiation during space missions.

Contribution

It introduces a novel method for detecting solar flare neutrinos with existing megaton-scale detectors, enabling potential early warning systems for space travel safety.

Findings

Estimated detection rates for powerful solar flares.

Potential for prompt neutrino-based flare alerts.

Implications for astronaut protection during space missions.

Abstract

The largest solar flare have been recorded in gamma flash and hard spectra up to tens GeV energy. The present building and upgrade of Hyper- Kamiokande (HK) in Japan and Korea, (as well as Deep Core, PINGU) Megatons neutrino detectors do offer a novel way to detectable trace of solar flares: their sudden anti-neutrino (or neutrino) imprint made by proton scattering and pion decays via Delta resonance production on solar corona foot-point. These signals might be observable at largest flare by HK via soft spectra up to tens-hundred MeV energy and by IceCube-PINGU at higher, GeVs energies. We show the expected rate of signals for the most powerful solar flare occurred in recent decades extrapolated for future Megaton detectors. The neutrino solar flare detection with its prompt alarm system may alert astronauts on space journey allowing them to hide themselves into inner rocket container surrounded by fuel or water supply. These container walls are able to defend astronauts from the main lethal (the dominant soft component) radiation wind due to such largest solar flares.