31 January 2022 to 3 February 2022
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Pattern Recognition for Multiple Interactions in a Neutron Monitor

1 Feb 2022, 15:15


Talk Tuesday


P.-S. Mangeard (University of Delaware)


The flux of Galactic cosmic rays at Earth is modulated by the long term magnetic variations of the Sun (11-year sunspot cycle and 22-year magnetic solar cycle). This process known as Solar modulation is most pronounced at 1 GeV and below. However, it also operates at much higher energy, still exhibiting solar magnetic polarity dependence. For the last decades, ground-based neutron monitors provided valuable observations of the solar modulation up to a rigidity cutoff of about 17 GV. To extend the energy range of the neutron monitor observations, we recently upgraded the electronics of the Princess Sirindhorn Neutron Monitor in Thailand (PSNM, the operating neutron monitor at the highest geomagnetic rigidity cutoff) to record complex combinations of hits in multiple proportional counters. The variety of event topology recorded at the PSNM indicates multiple sources: energetic atmospheric nucleons (GeV-range), coincidence of secondary particles, and possibly small air-shower core passing through the detector. We discuss these observations with a preliminary analysis of a detailed Monte-Carlo simulation of energetic neutrons interacting in the detector.

Type of Contribution talk

Primary authors

P.-S. Mangeard (University of Delaware) J. Clem (University of Delaware) Paul Evenson (University of Delaware) Dr Waraporn Nuntiyakul (Chiang Mai University) David Ruffolo (Mahidol University) Alejandro Sáiz (Mahidol University) Achara Seripienlert (National Astronomical Research Institute of Thailand (NARIT), Chiang Mai 50180, Thailand) Suruj Seunarine (University of Wisconsin–River Falls)

Presentation Materials