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| Titel |
High energy radiation from aircraft-triggered lightning and thunderstorm |
| VerfasserIn |
Pavlo Kochkin, Alexander P. J. van Deursen, Alte I. de Boer, Michiel Bardet, Jean-François Boissin |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250126666
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| Publikation (Nr.) |
 EGU/EGU2016-6422.pdf |
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| Zusammenfassung |
| In-flight Lightning Strike Damage Assessment System (ILDAS http://ildas.nlr.nl/) was
developed in an EU FP6 project to provide information on threat that lightning poses to
aircraft. The system contains one E-field and eight H-field sensors distributed over the
fuselage. It has recently been extended to include two LaBr3 scintillation detectors. The
scintillation detectors are sensitive to x-ray photons above 30 keV. The entire system
is installed on an A-350 aircraft. When triggered by lightning and digitizes data
synchronously with 10 ns intervals. Twelve continuously monitoring photon energy
channels were implemented for X-ray detectors operating at slower rate (15 ms, pulse
counting).
In spring of 2014 and 2015 the aircraft flew through thunderstorm cells recording the data
from the sensors. Total of 93 lightning strikes to the aircraft are recorded. Eighteen of them
are also detected by WWLLN network. One strike consists of six individual strokes within
200 ms that were all synchronously identified by WWLLN. The WWLLN inter-stroke
distance is much larger than the aircraft movement. Three of these strokes generated X-ray
bursts. One exceptionally bright X-ray pulse of more than 8 MeV has been detected in
association with another strike; it probably saturated the detector’s photomultiplier. Neither
long gamma-ray glow, nor positron annihilation have been detected during the
campaign. An explanation is sought in the typical altitude profile of these test flights. |
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