Measuring ionizing radiation in the atmosphere with a new balloon-borne detector

• Published in: arXiv.org
• Main Authors: Aplin, Karen L, Briggs, Aaron A, R Giles Harrison, Marlton, Graeme J
• Format: Paper Journal Article
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 25.03.2017
• Subjects: Cosmic rays; Energetic particles; Error detection; Gamma rays; Helium; Ionizing radiation; Laboratories; Laboratory tests; Muons; Natural radioactivity; Nuclei (nuclear physics); Physics - Atmospheric and Oceanic Physics; Physics - Instrumentation and Detectors; Radiosondes; Scintillation counters; Sensors; Troposphere
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.1703.06675

Increasing interest in energetic particle effects on weather and climate has motivated development of a miniature scintillator-based detector intended for deployment on meteorological radiosondes or unmanned airborne vehicles. The detector was calibrated with laboratory gamma sources up to 1.3 MeV, and known gamma peaks from natural radioactivity of up to 2.6 MeV. The specifications of our device in combination with the performance of similar devices suggest that it will respond to up to 17 MeV gamma rays. Laboratory tests show the detector can measure muons at the surface, and it is also expected to respond to other ionizing radiation including, for example, protons, electrons (>100 keV) and energetic helium nuclei from cosmic rays or during space weather events. Its estimated counting error is about 10%. Recent tests, when the detector was integrated with a meteorological radiosonde system, and carried on a balloon to ~25 km altitude, identified the transition region between energetic particles near the surface, which are dominated by terrestrial gamma emissions, to higher-energy particles in the free troposphere.