Measurement of accelerator neutron radiation field spectrum by Extended Range Neutron Multisphere Spectrometers and unfolding program

TL;DR

This study measures the neutron radiation spectrum at an accelerator beam line using Extended Range Neutron Multisphere Spectrometers and unfolding algorithms, combining simulation and experimental data for accurate spectrum analysis.

Contribution

It introduces a combined approach of FLUKA simulation and ERNMS measurements with unfolding to accurately characterize neutron spectra at an accelerator facility.

Findings

Good agreement between unfolded spectrum and simulation

Effective use of ERNMS and unfolding for neutron spectrum measurement

Enhanced understanding of neutron radiation environment at the beam line

Abstract

This paper described a measurement of accelerator neutron radiation field at a transport beam line of Beijing-TBF. The experiment place was be selected around a Faraday Cup with a graphite target impacted by electron beam at 2.5GeV. First of all, we simulated the neutron radiation experiment by FLUKA. Secondly, we chose six appropriate ERNMS according to their neutron fluence response function to measure the neutron count rate. Then the U_M_G package program was be utilized to unfolding experiment data. Finally, we drew a comparison between the unfolding with the simulation spectrum and made an analysis about the result.