Experimental characterization of the LUPIN Rem counter in monoenergetic neutron fields

The LUPIN is a Rem counter for neutron dosimetry in pulsed radiation fields, i.e., those fields whose intensity varies greatly on short timescales with respect to the characteristic time of the utilized detector. This work describes the characterization of the energy response of the instrument. The response function was calculated with the Monte Carlo code MCNP6, representing the geometry and material composition of the LUPIN and simulating an irradiation in expanded and aligned monoenergetic neutron fields. The calculated response was validated in the monoenergetic fields of the National Physical Laboratory. The agreement between the calculated and measured responses is satisfactory, with a maximum discrepancy of 5%.