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11. Measurement and Simulation of the Radiation Environment in the Lower Atmosphere for Dose Assessment

Author

Pioch, Christian, Paretzke, Herwig G. (Prof. Dr.), and Henning, Walter (Prof., Ph.D.)

Subjects
Physik, ddc:530
Abstract

Flying personnel is occupationally exposed to rather high radiation levels due to secondary cosmic radiation. Therefore, the radiation environment induced in the lower atmosphere by galactic and solar cosmic radiation was characterized by means of particle transport calculations using GEANT4. These calculations were validated with continuous measurements of the energy spectra of secondary neutrons with Bonner sphere spectrometers at the Zugspitze mountain and near the North Pole. The response of these instruments was determined with GEANT4 and for the first time experimentally verified at high neutron energies (244 and 387 MeV). Route doses for aircrews along typical long-haul flights were determined for galactic and solar cosmic radiation using most recent data on the magnetospheric field and primary cosmic radiation. Fliegendes Personal ist berufsbedingt einer verhältnismäßig hohen Strahlenexposition durch sekundäre kosmische Strahlung ausgesetzt. In dieser Arbeit wurde daher das durch die galaktische und solare kosmische Strahlung induzierte Strahlungsfeld in der Atmosphäre mittels Teilchen-Transportrechnungen unter Verwendung von GEANT4 charakterisiert. Diese Rechnungen wurden durch kontinuierliche Messungen der Energiespektren sekundärer Neutronen mittels Bonner Spektrometer auf der Zugspitze und nahe des Nordpols validiert. Das Ansprechvermögen dieser Instrumente wurde mit GEANT4 bestimmt und erstmals bei hohen Neutronenenergien (244 und 387 MeV) experimentell verifiziert. Flugdosen entlang typischer Flugrouten wurden für galaktische und solare kosmische Strahlung unter Verwendung modernster Daten zu Erdmagnetfeld und primärer kosmischer Strahlung bestimmt.

Published
2012

12. Characterization of quasi-monoenergetic neutron source using 137, 200, 246 and 389 MeV 7Li(p,n) reactions

Author

Iwamoto, Yosuke, primary, Hagiwara, Masayuki, additional, Iwase, Hiroshi, additional, Yashima, Hiroshi, additional, Satoh, Daiki, additional, Matsumoto, Tetsuro, additional, Masuda, Akihiko, additional, Pioch, Christian, additional, Mares, Vladimir, additional, Shima, Tatsushi, additional, Tamii, Atsushi, additional, Hatanaka, Kichiji, additional, and Nakamura, Takashi, additional

Published
2014
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13. Measurement of neutron energy spectra behind shields for quasi-monoenergetic neutrons generated by 246-MeV and 389-MeV protons using a Bonner sphere spectrometer

Author

Matsumoto, Tetsuro, primary, Masuda, Akihiko, additional, Nishiyama, Jun, additional, Harano, Hideki, additional, Iwase, Hiroshi, additional, Iwamoto, Yosuke, additional, Hagiwara, Masayuki, additional, Satoh, Daiki, additional, Yashima, Hiroshi, additional, Nakane, Yoshihiro, additional, Nakashima, Hiroshi, additional, Sakamoto, Yukio, additional, Pioch, Christian, additional, Mares, Vladimir, additional, Tamii, Atsushi, additional, Hatanaka, Kichiji, additional, and Nakamura, Takashi, additional

Published
2014
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14. Neutron Dosimetry in Quasi-Monoenergetic Fields of 244 and 387 MeV

Author

Mares, Vladimir, primary, Pioch, Christian, additional, Ruhm, Werner, additional, Iwase, Hiroshi, additional, Iwamoto, Yosuke, additional, Hagiwara, Masayuki, additional, Satoh, Daiki, additional, Yashima, Hiroshi, additional, Itoga, Toshiro, additional, Sato, Tatsuhiko, additional, Nakane, Yoshihiro, additional, Nakashima, Hiroshi, additional, Sakamoto, Yukio, additional, Matsumoto, Tetsuro, additional, Masuda, Akihiko, additional, Harano, Hideki, additional, Nishiyama, Jun, additional, Theis, Christian, additional, Feldbaumer, Eduard, additional, Jaegerhofer, Lukas, additional, Tamii, Atsushi, additional, Hatanaka, Kichiji, additional, and Nakamura, Takashi, additional

Published
2013
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15. Response Measurement of a Bonner Sphere Spectrometer for High-Energy Neutrons

Author

Masuda, Akihiko, primary, Matsumoto, Tetsuro, additional, Harano, Hideki, additional, Nishiyama, Jun, additional, Iwamoto, Yosuke, additional, Hagiwara, Masayuki, additional, Satoh, Daiki, additional, Iwase, Hiroshi, additional, Yashima, Hiroshi, additional, Nakamura, Takashi, additional, Sato, Tatsuhiko, additional, Itoga, Toshiro, additional, Nakane, Yoshihiro, additional, Nakashima, Hiroshi, additional, Sakamoto, Yukio, additional, Theis, Christian, additional, Feldbaumer, Eduard, additional, Jaegerhofer, Lukas, additional, Pioch, Christian, additional, Mares, Vladimir, additional, Tamii, Atsushi, additional, and Hatanaka, Kichiji, additional

Published
2012
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