A time-of-flight Highly Granular Neutron Detector(HGND)with a multilayer longitudinal structure of interleaved absorber and scintillator plates,high transverse granularity,and time resolution of approximately 150 ps i...A time-of-flight Highly Granular Neutron Detector(HGND)with a multilayer longitudinal structure of interleaved absorber and scintillator plates,high transverse granularity,and time resolution of approximately 150 ps is currently under development.The detector is designed to identify neutrons produced in nucleus-nucleus collisions and measure neutron kinetic energies of 0.3-4 GeV by the time-of-flight method in the BM@N experiment at the NICA accelerator complex at JINR.To validate the concept of full-scale HGND,a compact HGND prototype was first designed and built,and its performance was studied in the BM@N experiment.The acceptance of the HGND prototype and the detection efficiency of forward neutrons emitted in hadronic fragmentation and electromagnetic dissociation(EMD)of 3.8A GeV124Xe projectiles interacting with a CsI target were calculated by means of the DCM-QGSM-SMM and RELDIS models,respectively.The energy distributions of the forward spectator neutrons and neutrons from the EMD were measured and compared with the simulations.The developed methods will be used to calibrate the full-scale HGND and study its efficiency.展开更多
基金supported by the Institute for Nuclear Research of the Russian Academy of Sciences。
文摘A time-of-flight Highly Granular Neutron Detector(HGND)with a multilayer longitudinal structure of interleaved absorber and scintillator plates,high transverse granularity,and time resolution of approximately 150 ps is currently under development.The detector is designed to identify neutrons produced in nucleus-nucleus collisions and measure neutron kinetic energies of 0.3-4 GeV by the time-of-flight method in the BM@N experiment at the NICA accelerator complex at JINR.To validate the concept of full-scale HGND,a compact HGND prototype was first designed and built,and its performance was studied in the BM@N experiment.The acceptance of the HGND prototype and the detection efficiency of forward neutrons emitted in hadronic fragmentation and electromagnetic dissociation(EMD)of 3.8A GeV124Xe projectiles interacting with a CsI target were calculated by means of the DCM-QGSM-SMM and RELDIS models,respectively.The energy distributions of the forward spectator neutrons and neutrons from the EMD were measured and compared with the simulations.The developed methods will be used to calibrate the full-scale HGND and study its efficiency.
