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| Titel |
Possible effects on avionics induced by terrestrial gamma-ray flashes |
| VerfasserIn |
M. Tavani, A. Argan, A. Paccagnella, A. Pesoli, F. Palma, S. Gerardin, M. Bagatin, A. Trois, P. Picozza, P. Benvenuti, E. Flamini, M. Marisaldi, C. Pittori, P. Giommi |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 13, no. 4 ; Nr. 13, no. 4 (2013-04-30), S.1127-1133 |
| Datensatznummer |
250018420
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| Publikation (Nr.) |
 copernicus.org/nhess-13-1127-2013.pdf |
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| Zusammenfassung |
| Terrestrial gamma-ray flashes (TGFs) are impulsive (intrinsically
sub-millisecond) events associated with lightning in powerful thunderstorms.
TGFs turn out to be very powerful natural accelerators known to accelerate
particles and generate radiation up to hundreds of MeV energies. The number
ratio of TGFs over normal lightning has been measured in tropical regions to
be near 10−4. We address in this Article the issue of the possible
susceptibility of typical aircraft electronics exposed to TGF particle,
gamma ray and neutron irradiation. We consider possible scenarios regarding
the intensity, the duration, and geometry of TGFs influencing nearby
aircraft, and study their effects on electronic equipment. We calculate, for
different assumptions, the total dose and the dose-rate, and estimate
single-event-effects. We find that in addition to the electromagnetic
component (electrons/positrons, gamma rays) also secondary neutrons produced
by gamma-ray photo production in the aircraft structure substantially
contribute to single-event effects in critical semiconductors components.
Depending on the physical characteristics and geometry, TGFs may deliver a
large flux of neutrons within a few milliseconds in an aircraft. This flux is
calculated to be orders of magnitude larger than the natural cosmic-ray
background, and may constitute a serious hazard to aircraft electronic
equipment. We present a series of numerical simulations supporting our
conclusions. Our results suggest the necessity of dedicated measurement
campaigns addressing the radiative and particle environment of aircraft near
or within thunderstorms. |
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