Study of individual pulses at the Antarctic high-altitude neutron monitor DOMC
|Author:||Similä, Markus1; Poluianov, Stepan1; Usoskin, Ilya1|
1Sodankylä Geophysical Observatory, University of Oulu, Finland
|Online Access:||PDF Full Text (PDF, 1.2 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2021062339684
|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.
Cosmic ray studies with neutron detectors
|Volume:||2021 : 1|
|Pages:||173 - 176|
Proceedings of NMDB@Home 2020
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
The work was partly supported by FINNARP and Academy of Finland (projects 264378 CRIPA and 304435 CRIPA-X).
|Academy of Finland Grant Number:||
264378 (Academy of Finland Funding decision)
304435 (Academy of Finland Funding decision)
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