  A Monte Carlo simulation-based optimization of a multilayer 10B-RPC thermal
neutron detector is performed targeting an increase in the counting rate
capability while maintaining high (>50%) detection efficiency for thermal
neutrons. The converter layer thicknesses of individual RPCs are optimized for
several configurations of a detector containing a stack of 10 double gap RPCs.
The results suggest that it is possible to reach a counting rate which is by a
factor of eight higher in comparison to the rate of a detector with only one
double-gap RPC. The effect of neutron scattering inside the detector
contributing to the background is analyzed and design modifications of the
first detector prototype, tested at neutron beam, are suggested.
