SwePub
Sök i LIBRIS databas

  Utökad sökning

WFRF:(Reitz B)
 

Sökning: WFRF:(Reitz B) > Temporal and spatia...

Temporal and spatial evolution of the solar energetic particle event on 20 January 2005 and resulting radiation doses in aviation

Matthia, D. (författare)
Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR),Christian-Albrechts-Universität zu Kiel,University of Kiel
Heber, B. (författare)
Christian-Albrechts-Universität zu Kiel,University of Kiel
Reitz, G. (författare)
Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
visa fler...
Meier, M. (författare)
Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
Sihver, Lembit, 1962 (författare)
Chalmers tekniska högskola,Chalmers University of Technology
Berger, T. (författare)
Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
Herbst, K. (författare)
Christian-Albrechts-Universität zu Kiel,University of Kiel
visa färre...
 (creator_code:org_t)
2009
2009
Engelska.
Ingår i: Journal of Geophysical Research. - 0148-0227 .- 2156-2202. ; 114:8, s. A08104 (art no)-
  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
Stäng  
  • The solar energetic particle event on 20 January 2005 was one of the largest ground level events ever observed. Neutron monitor stations in the Antarctic recorded count rate increases of several thousand percent caused by secondary energetic particles, and it took more than 36 h to return to background level. Such huge increases in high energetic solar cosmic radiation on the ground are obviously accompanied by considerable changes in the radiation environment at aviation altitudes. Measurements of 28 neutron monitor stations were used in this work to numerically approximate the primary solar proton spectra during the first 12 h of the event by minimizing the differences between measurements and the results of Monte-Carlo calculated count rate increases. The primary spectrum of solar energetic protons was approximated by a power law in rigidity and a linear angular distribution. The incoming direction of the solar energetic particles was determined and compared to the interplanetary magnetic field direction during the event. The effects on the radiation exposure at altitudes of about 12 km during that time were estimated to range from none at low latitudes up to almost 2 mSv/h for a very short time in the Antarctic region and about 0.1 mSv/h at high latitudes on the Northern Hemisphere. After 12 h, dose rates were still increased by 50% at latitudes above 60 degrees whereas no increases at all occurred at latitudes below 40 degrees during the whole event.

Ämnesord

NATURVETENSKAP  -- Fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences (hsv//eng)

Nyckelord

10 tev
neutrons
cosmic-rays
shock acceleration
fluence
flare
latitude
conversion coefficients
abundances
magnetic-fields

Publikations- och innehållstyp

art (ämneskategori)
ref (ämneskategori)

Hitta via bibliotek

Till lärosätets databas

Sök utanför SwePub

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy