University of Oulu

Similä, Markus / Poluianov, Stepan / Usoskin, Ilya: Study of individual pulses at the Antarctic high-altitude neutron monitor DOMC.

Study of individual pulses at the Antarctic high-altitude neutron monitor DOMC

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Author: Similä, Markus1; Poluianov, Stepan1; Usoskin, Ilya1
Organizations: 1Sodankylä Geophysical Observatory, University of Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 1.2 MB)
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Language: English
Published: Universitätsverlag Kiel, 2021
Publish Date: 2021-06-23


A pair of neutron monitors (NMs) is installed on the high Central Antarctic plateau, at the Concordia station (3200 m altitude) and measures the nucleonic component of nucleonic-muon-electromagnetic cascades induced by high-energy cosmic rays in the atmosphere. The installation includes two NMs: DOMC, a standard mini-NM, and a bare (lead-free) DOMB NM. The newly installed data acquisition (DAQ) system records individual pulses corresponding to mostly neutrons in the detector’s counting tube. Here we analyze different types of pulses and study the distribution of the waiting times between individual pulses as well as the pulse height, recorded by the DOMC NM during a quiet period of January 2020. The distribution appears doublepeaked with peaks corresponding to the frequency of individual atmospheric cascades and the intra-cascade variability, respectively. We discuss also the nature of different components contributing to the pulses and separation of the signal from noise. It is shown that the waiting-time distribution has distinguished timescales, >30 ms defined by the cosmic-ray induced atmospheric cascades, and <10 ms reflecting the intra-cascade variability. The new DAQ system allows one to study the development of the atmospheric cascade.

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Series: Cosmic ray studies with neutron detectors
ISSN: 2748-3150
ISSN-E: 2748-3150
ISSN-L: 2748-3150
ISBN: 978-3-928794-64-0
Volume: 2021 : 1
Pages: 173 - 176
DOI: 10.38072/2748-3150/p22
Host publication: Proceedings of NMDB@Home 2020
Conference: NMDB@Home : virtual symposium on cosmic ray studies with neutron detector
Type of Publication: B3 Article in conference proceedings
Field of Science: 115 Astronomy and space science
Funding: The work was partly supported by FINNARP and Academy of Finland (projects 264378 CRIPA and 304435 CRIPA-X).
Academy of Finland Grant Number: 264378
Detailed Information: 264378 (Academy of Finland Funding decision)
304435 (Academy of Finland Funding decision)
Copyright information: This work is published under the Creative Commons Attribution 4.0 International licence (CC BY 4.0). Please note that individual, appropriately marked parts of the work may be excluded from the licence mentioned or may be subject to other copyright conditions. If such thirdparty material is not under the Creative Commons license, any copying, editing or public reproduction is only permitted with the prior consent of the respective copyright owner or on the basis of relevant legal authorization regulations.