Figure 3
From: A new ground level neutron monitor for space weather assessment

Results of the initial slab parameter optimisations showing the figure of merit (FOM, i.e., the indicative count rate from the \(^{10}\)B(n,\(\alpha\)) reaction rate tally) against (a) the aspect ratio for all constant volume simulations and (b) the Pb thickness in cm for all equal Pb thickness simulations.