Duangjai B.Nuntiyakul W.Seripienlert A.Pagwhan A.Chaiwongkhot K.Sáiz A.Ruffolo D.Evenson P.Mahidol University2024-02-082024-02-082023-01-01Journal of Physics: Conference Series Vol.2653 No.1 (2023)17426588https://repository.li.mahidol.ac.th/handle/20.500.14594/95755Due to their global availability, neutron monitors play a crucial role in measuring time variations in the Galactic cosmic ray flux. A portable calibration neutron monitor (CalMon) is useful for intercalibrating various neutron monitors to ensure accurate measurements. A common technique to ensure that the calibration is done in a consistent environment is to place the CalMon at some height above a wide container (such as a portable swimming pool) filled with water. This study investigates the impact of CalMon height and water depth on the count rate ratio relative to a standard 18NM64 count rate recorded nearby (CalMon/18NM64). We compare simulated data from the FLUKA Monte Carlo package to experimental data from [1] to demonstrate the statistical accuracy of our simulation. Using the simulation results, we then extend the study of the proximity-to-water effect on the counting rate. In this work, we present a preliminary empirical model by analyzing the CalMon/18NM64 as a function of CalMon to water distance. Overall, our study enhances understanding of the response of calibration monitors (now often called “mini-neutron monitors”) operated in various locations worldwide, and validates the Monte Carlo techniques used to model the response of the global neutron monitor network.Physics and AstronomyConference PaperSCOPUS10.1088/1742-6596/2653/1/0120182-s2.0-8518198602817426596