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Measurements of the radiation quality factor Q at aviation altitudes during solar minimum (2006-2008),

Meier, Matthias M. and Hubiak, Melina (2010) Measurements of the radiation quality factor Q at aviation altitudes during solar minimum (2006-2008),. Advances in Space Research, 45 (9), pp. 1178-1181. Elsevier. DOI: 10.1016/j.asr.2009.08.008.

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Abstract

In radiation protection, the Q-factor has been defined to describe the biological effectiveness of the energy deposition or absorbed dose to humans in the mixed radiation fields at aviation altitudes. This particular radiation field is generated by the interactions of primary cosmic particles with the atoms of the constituents of the Earth’s atmosphere. Thus the intensity, characterized by the ambient dose equivalent rate H*(10), depends on the flight altitude and the energy spectra of the particles, mainly protons and alpha particles, impinging on the atmosphere. These charged cosmic projectiles are deflected both by the interplanetary and the Earth’s magnetic field such that the corresponding energy spectra are modulated by these fields. The solar minimum is a time period of particular interest since the interplanetary magnetic field is weakest within the 11-year solar cycle and the dose rates at aviation altitudes reach their maximum due to the reduced shielding of galactic cosmic radiation. For this reason, the German Aerospace Center (DLR) performed repeated dosimetric on-board measurements in cooperation with several German airlines during the past solar minimum from March 2006 to August 2008. The Q-factors measured with a TEPC range from 1.98 at the equator to 2.60 in the polar region.

Document Type:Article
Title:Measurements of the radiation quality factor Q at aviation altitudes during solar minimum (2006-2008),
Authors:
AuthorsInstitution or Email of Authors
Meier, Matthias M.UNSPECIFIED
Hubiak, MelinaUNSPECIFIED
Date:2010
Journal or Publication Title:Advances in Space Research
Refereed publication:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:45
DOI:10.1016/j.asr.2009.08.008
Page Range:pp. 1178-1181
Editors:
EditorsEmail
COSPAR, (Hrsg.)UNSPECIFIED
Publisher:Elsevier
Status:Published
Keywords:Aviation, Radiation exposure of aircrew, Radiation quality, Q-factor, Space weather
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W FR - Forschung unter Weltraumbedingungen (old)
DLR - Research area:Space
DLR - Program:W FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):W - Vorhaben Strahlenbiologie (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Radiation Biology
Deposited By: Kerstin Kopp
Deposited On:12 Apr 2010 13:26
Last Modified:26 Mar 2013 13:14

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