XXVIth International Baldin Seminar on High Energy Physics Problems "Relativistic Nuclear Physics and Quantum Chromodynamics"

A novel method for neutron energy spectrum reconstruction with the HGND in the BM@N experiment

19 Sept 2025, 09:40

20m

LHEP-215/NICA Hall - NICA Hall (VBLHEP)

20 min. Projects NICA/MPD/SPD/BM@N at JINR Projects NICA/MPD/SPD/BM@N at JINR

Speaker

Shabanov, Arseniy (INR RAS)

Description

To extend the capabilities of the fixed-target BM@N experiment (JINR, Dubna), the Highly Granular Neutron Detector (HGND) [1] has been developed. This detector will enable unique measurements of neutrons in the kinetic energy range of 0.3-4.0 GeV. The HGND comprises two arms, each consisting of 8 layers of plastic scintillator with copper absorber plates in between. Each scintillation layer is assembled from an 11x11 matrix of individual cells, providing high spatial granularity and a time resolution of ~150 ps.
Neutrons have to be recognized in the presence of a high background of charged particles, secondary neutrons, and photons. A dedicated cluster identification algorithm is being developed to distinguish neutrons from background particles. The neutron kinetic energy is reconstructed via the time-of-flight technique. The first results of neutron energy spectrum reconstruction in Bi+Bi collisions at 3A GeV will be presented.

References:
1. S. Morozov et al., Nucl.Instrum.Meth.A 1072, 170152 (2025)

Presentation materials

Shabanov_NovelMethodHGND.pdf