The response of the deep river neutron monitor to an anisotropic flux of solar cosmic rays

Abstract

The response of a neutron monitor to an anisotropic flux of solar cosmic rays is a function of the viewing direction of the detector through the magnetosphere, as defined by the asymptotic cone of acceptance, and the direction of the solar cosmic ray flux anisotropy. Since the Deep River, Canada, neutron monitor data are used extensively for monitoring the cosmic radiation intensity and are often used as a standard in the analyses of cosmic ray data, we have calculated the response of this monitor throughout the day to a high-energy (>450 MeV) anisotropic solar cosmic ray event propagating along the ecliptic plane. This technique can be applied to any ground-based neutron monitor.