München 2019 – wissenschaftliches Programm
EP 9.13: Poster
Donnerstag, 21. März 2019, 16:30–19:00, Durchgangshalle
Thermal Atmospheric Neutron Observation System — •Friederike Schattke, Marc Hansen, Patrick Pohland, Lisa Romaneehsen, Jonas Zumkeller, Robert Wimmer-Schweingruber, and Bernd Heber — Christian-Albrechts-Universität zu Kiel, Institut für Experimentelle und Angewandte Physik, Abteilung Extraterrestrische Physik, Deutschland
The Earth is continuously exposed to high energy charged particles from galactic cosmic rays. Due to galactic cosmic rays interacting with atmospheric particles, secondary neutrons are generated. Those are moderated to thermal energies below 0.025 eV through elastic scattering. The main objective of the Thermal Atmospheric Neutron Observation System (TANOS) is to measure the flux of thermal neutrons in the stratosphere. In order to measure these low energy neutrons we make use of the conversion electrons resulting through thermal neutron capture in Gadolinium. Gadolinium is particularly suitable for the experiment due to its high cross section of 49000 barn. In the atmosphere we expect a radiation field consisting of charged and uncharged particles. The flux of secondary particles is the largest at a height of about 20 km, the so called Pfotzer maximum. To characterize this height dependency of the radiation field, TANOS also measures the flux of charged particles. In this talk we are going to present the detector layout and its response function that is simulated with GEANT4.