SMuK 2021 – scientific programme

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EP: Fachverband Extraterrestrische Physik

EP 3: Near Earth Space I

EP 3.4: Talk

Tuesday, August 31, 2021, 12:00–12:15, H8

Dorman function of the DOSimetry TELescope (DOSTEL) count and dose rates aboard an aircraft — •Lisa Romaneehsen, Sönke Burmeister, Bernd Heber, Konstantin Herbst, Johannes Marquardt, Christoph Senger, and Carsten Wallmann — Christian-Albrechts-Universität zu Kiel, Institut für Experimentelle und Angewandte Physik, Abteilung Extraterrestrische Physik, Deutschland

The Earth is continuously exposed to high energetic charged particles of galactic cosmic rays. The flux of these particles is altered by the magnetized solar wind in the heliosphere and the Earth's magnetic field. If cosmic rays hit the atmosphere, the formation of secondary particles depends on the atmospheric density above the observer. Therefore, the ability of a particle to approach an aircraft depends on its energy and the position and altitude of the aircraft.

The radiation detector of the detector system NAVIDOS (NAVIgation DOSimetry) is the DOSimetry Telescope (DOSTEL) measuring the count and dose rate in two semiconductor detectors. From 2008 to 2011 two instruments were installed in two aircraft. The access for energetic charged particles to the current position of the observer is given by the so-called cut-off rigidity. To analyze the data we corrected them for pressure variation by normalizing them to one flight level. We found that the normalization parameters vary with the solar modulation parameter and the cut-off rigidity as expected. These corrected data were utilized to determine the cut-off rigidity dependence by fitting the so called Dorman function to the observation.