Neutron Monitor Response Functions |
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Authors: | Clem John M Dorman Lev I |
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Institution: | (1) Bartol Research Institute, University of Delaware, Newark, DE, 19716, U.S.A.;(2) IZMIRAN, Moscow, Russia |
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Abstract: | The neutron monitor provides continuous ground-based recording of the hadronic component in atmospheric secondary radiation
which is related to primary cosmic rays. Simpson (1948) discovered that the latitude variation of the secondary hadronic component
was considerably larger than the muon component suggesting the response of a neutron monitor is more sensitive to lower energies
in the primary spectrum. The different methods of determining the neutron monitor response function of primary cosmic rays
are reviewed and discussed including early and recent results. The authors also provide results from a new calculation (Clem,
1999) including angle dependent yield functions for different neutron monitor types which are calculated using a simulation
of cosmic ray air showers combined with a detection efficiency simulation for different secondary particle species. Results
are shown for IGY and NM64 configurations using the standard 10BF3 detectors and the new 3He detectors to be used in the Spaceship Earth Project (Bieber et al., 1995). The method of calculation is described in detail and the results are compared with measurements and previous calculations.
A summary of future goals is discussed.
This revised version was published online in August 2006 with corrections to the Cover Date. |
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