Speaker
Description
Abstract:
Comprehensive analysis of cosmic ray neutron flux measurements from the KACST mini neutron monitor (Riyadh, Saudi Arabia, Rc = 14.4 GV) has been conducted to quantify the influence of meteorological parameters on cosmic ray intensity variations. The investigation, spanning 2020-2024, systematically evaluates the correlations between neutron flux and key atmospheric variables, essential for proper cosmic ray modulation analysis.
Statistical analysis reveals pronounced seasonal oscillations in neutron monitor count rates, characterized by summer maxima and winter minima. Temperature demonstrates a robust positive correlation with neutron flux (R=0.83), exhibiting a temperature coefficient β=0.4 cts/°C, attributed to atmospheric thermal expansion effects on secondary neutron absorption. Atmospheric pressure and humidity show significant inverse correlations (R=0.78 and R=0.6 respectively), with corresponding barometric and humidity coefficients of α=-0.34 cts/hPa and γ=-0.34 cts/%, consistent with enhanced neutron attenuation processes in denser atmospheric conditions.
These findings significantly enhance our understanding of environmental influences on cosmic ray measurements, with important implications for space weather monitoring applications and radiation dose assessments.
Keywords: mini Neutron Monitor; Atmospheric Effects; Cosmic Ray Modulation; Meteorological Parameters; high cutoff rigidity
