Concept information
Preferred term
solar energetic particle
Definition(s)
- Solar energetic particles (SEP), once called solar cosmic rays, are high-energy particles coming from the Sun. They were first observed in the early 1940s. They consist of protons, electrons and heavy ions from the solar corona with energy ranging from a few tens of keV to many GeV (the fastest particles can reach a large fraction of the speed of light, as in a ground level enhancement (a sudden increase in intensity observed by ground‐based neutrons detectors first described by Scott Forbush). SEPs are of particular importance because they can endanger astronauts, (particularly during deep space travel outside the protection of the Earth's magnetosphere) and, in the largest SEP events, can cause secondary radiation showers that can irradiate polar route airline passengers. (Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Solar_energetic_particles)
Broader concept(s)
Synonym(s)
- solar cosmic ray particle
In other languages
URI
http://data.loterre.fr/ark:/67375/MDL-QT5X13QB-6
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