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Characteristic of the Radiation Field in Low Earth Orbit and in Deep Space

Reitz, Guenther (2008) Characteristic of the Radiation Field in Low Earth Orbit and in Deep Space. Z. Med. Phys., 18 (4), Seiten 233-243. Elsevier. DOI: 10.1016/j.zemedi.2008.06.015.

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Kurzfassung

The radiation exposure in space by cosmic radiation can be reduced through careful mission planning and constructive measures as example the provision of a radiation shelter, but it cannot be completely avoided. The reason for that are the extreme high energies of particles in this field and the herewith connected high penetration depth in matter. For missions outside the magnetosphere ionizing radiation is recognized as the key factor through its impact on crew health and performance. In absence of sporadic solar particle events the radiation exposure in Low Earth orbit (LEO) inside Spacecraft is determined by the galactic cosmic radiation (protons and heavier ions) and by the protons inside the South Atlantic Anomaly (SAA), an area where the radiation belt comes closer to the earth surface due to a displacement of the magnetic dipole axes from the Earth's center. In addition there is an albedo source of neutrons produced as interaction products of the primary galactic particles with the atoms of the earth atmosphere. Outside the spacecraft the dose is dominated by the electrons of the horns of the radiation belt located at about 60 ° latitude in Polar Regions. The radiation field has spatial and temporal variations in dependence of the Earth magnetic field and the solar cycle. The complexity of the radiation field inside a spacecraft is further increased through the interaction of the high energy components with the spacecraft shielding material and with the body of the astronauts. In interplanetary missions the radiation belt will be crossed in a couple of minutes and therefore its contribution to their radiation term exposure is quite small, but subsequently the protection by the Earth magnetic field is lost, leaving only shielding measures as exposure reduction means. The report intends to describe the radiation field in space, the interaction of the particles with the magnetic field and shielding material and give some numbers on the radiation exposure in low earth orbits and in interplanetary missions.

Dokumentart:Zeitschriftenbeitrag
Titel:Characteristic of the Radiation Field in Low Earth Orbit and in Deep Space
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Reitz, GuentherNICHT SPEZIFIZIERT
Datum:2008
Erschienen in:Z. Med. Phys.
Referierte Publikation:Ja
In ISI Web of Science:Nein
Band:18
DOI :10.1016/j.zemedi.2008.06.015
Seitenbereich:Seiten 233-243
Verlag:Elsevier
Status:veröffentlicht
Stichwörter:cosmic radiation; radiation measurements
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W FR - Forschung unter Weltraumbedingungen (alt)
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W FR - Forschung unter Weltraumbedingungen
DLR - Teilgebiet (Projekt, Vorhaben):W - Vorhaben Strahlenbiologie (alt)
Standort: Köln-Porz
Institute & Einrichtungen:Institut für Luft- und Raumfahrtmedizin > Strahlenbiologie
Hinterlegt von: Kerstin Kopp
Hinterlegt am:15 Dez 2008
Letzte Änderung:27 Apr 2009 15:11

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