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Mini Neutron Monitors at Concordia Research Station, Central Antarctica

  • Poluianov, Stepan ;
  • Usoskin, Ilya ;
  • Mishev, Alexander ;
  • Moraal, Harm ;
  • Kruger, Helena ;
  • Casasanta, Giampietro ;
  • Traversi, Rita ;
  • Udisti, Roberto
  • Received : 2015.11.22
  • Accepted : 2015.12.04
  • Published : 2015.12.15

Abstract

Two mini neutron monitors are installed at Concordia research station (Dome C, Central Antarctica, $75^{\circ}06^{\prime}S$, $123^{\circ}23^{\prime}E$, 3,233 m.a.s.l.). The site has unique properties ideal for cosmic ray measurements, especially for the detection of solar energetic particles: very low cutoff rigidity < 0.01 GV, high elevation and poleward asymptotic acceptance cones pointing to geographical latitudes > $75^{\circ}S$. The instruments consist of a standard neutron monitor and a "bare" (lead-free) neutron monitor. The instrument operation started in mid-January 2015. The barometric correction coefficients were computed for the period from 1 February to 31 July 2015. Several interesting events, including two notable Forbush decreases on 17 March 2015 and 22 June 2015, and a solar particle event of 29 October 2015 were registered. The data sets are available at cosmicrays.oulu.fi and nmdb.eu.

Keywords

neutron monitor;solar energetic particle;Antarctica

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  3. Altitude survey of the galactic cosmic ray flux with a Mini Neutron Monitor vol.58, pp.7, 2016, https://doi.org/10.1016/j.asr.2016.06.021
  4. Analyses of cosmic ray induced-neutron based on spectrometers operated simultaneously at mid-latitude and Antarctica high-altitude stations during quiet solar activity vol.83, 2016, https://doi.org/10.1016/j.astropartphys.2016.07.002
  5. GLE and Sub-GLE Redefinition in the Light of High-Altitude Polar Neutron Monitors vol.292, pp.11, 2017, https://doi.org/10.1007/s11207-017-1202-4
  6. Retrospective analysis of GLEs and estimates of radiation risks vol.8, pp.2115-7251, 2018, https://doi.org/10.1051/swsc/2018042
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Acknowledgement

Supported by : Academy of Finland