This study undertakes a comprehensive characterization of an extended range rem counter. Traditionally, these instruments adopt a gas thermal neutron detector surrounded by a polyethylene neutron moderator. Recently, Microstructured Semiconductor Neutron Detectors have garnered attention due to their advantageous traits: minimal voltage requirements high photon-neutron discrimination, cost-effectiveness, and the overall ease of use. Monte Carlo simulations using FLUKA were performed to assess the detector's response curve as function of neutron energy. The aim was to ensure its alignment with the fluence to ambient dose equivalent conversion factors across an extended range. The calibration coefficient, determined experimentally at the Czech Metrology Institute (CMI) in Prague, underwent validation at CERN’s calibration facility. Furthermore, to assess the detector’s response in high-energy mixed fields, it underwent irradiation at the CERN-EU high-energy References Field (CERF) facility. The results suggest the rem counter's proficiency in intense mixed fields, validating its applicability for both ambient dose monitoring and beam loss monitoring applications.
CHARACTERIZATION OF AN EXTENDED RANGE REM COUNTER BASED ON MICRO STRUCTURED NEUTRON DETECTOR
Bonforte F
;D'Angola A;
2023-01-01
Abstract
This study undertakes a comprehensive characterization of an extended range rem counter. Traditionally, these instruments adopt a gas thermal neutron detector surrounded by a polyethylene neutron moderator. Recently, Microstructured Semiconductor Neutron Detectors have garnered attention due to their advantageous traits: minimal voltage requirements high photon-neutron discrimination, cost-effectiveness, and the overall ease of use. Monte Carlo simulations using FLUKA were performed to assess the detector's response curve as function of neutron energy. The aim was to ensure its alignment with the fluence to ambient dose equivalent conversion factors across an extended range. The calibration coefficient, determined experimentally at the Czech Metrology Institute (CMI) in Prague, underwent validation at CERN’s calibration facility. Furthermore, to assess the detector’s response in high-energy mixed fields, it underwent irradiation at the CERN-EU high-energy References Field (CERF) facility. The results suggest the rem counter's proficiency in intense mixed fields, validating its applicability for both ambient dose monitoring and beam loss monitoring applications.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
