Analyses of cosmic ray induced-neutron based on spectrometers operated simultaneously at mid-latitude and Antarctica high-altitude stations during quiet solar activity

Guillaume Hubert (1)

1 ONERA - The French Aerospace Lab [Toulouse]

In this paper are described a new neutron spectrometer which operate in the Concordia station (Antarctica, Dome C) since December 2015. This instrument complements a network including neutron spectrometers operating in the Pic-du-Midi and the Pico dos Dias. Thus, this work present an analysis of cosmic ray induced-neutron based on spectrometers operated simultaneously in the Pic-du-Midi and the Concordia stations during a quiet solar activity. The both high station platforms allow for investigating the long period dynamics to analyze the spectral variation and effects of local and seasonal changes, but also the short term dynamics during solar flare events. A first part is devoted to analyze the count rates, the spectrum and the neutron fluxes, implying cross-comparisons between data obtained in the both stations. In a second part, measurements analyses were reinforced by modeling based on simulations of atmospheric cascades according to primary spectra which only depend on the solar modulation potential.

Mots clés: ATMOSPHERIC RADIATION ENVIRONMENT; NEUTRON SPECTROMETER; HIGH ALTITUDE STATIONS; ANTARCTICA; CONCORDIA STATION; PIC DU MIDI STATION; ATMORAD

Domaines: Physique de l'espace [physics.space-ph]

Guillaume Hubert. Analyses of cosmic ray induced-neutron based on spectrometers operated simultaneously at mid-latitude and Antarctica high-altitude stations during quiet solar activity. Astroparticle Physics, 2016, 83, p. 30-39. ⟨10.1016/j.astropartphys.2016.07.002⟩. ⟨hal-01402881⟩