Speaker
Description
A system of counters with fast organic scintillators, registering high energy nuclei of the
Nuclotron beam, and a set of neutron detectors based on stilbene, used for TOF
measurements of neutron spectra, were developed for the BM@N experiment. The detectors
are operating in a strong magnetic field of the BM@N magnet. Scintillation photons are
registered with fine-mesh and MCP PMTs in the beam counters and with SiPMs in the
neutron detectors. The beam detectors provide fast trigger on nucleus – nucleus interactions
in a target and generation of start pulse for TOF detectors. The neutron spectrometer covers
energy range from 2 to 200 MeV using a short flight path of 30 cm. These tasks require a
picosecond time resolution for both types of the detectors. Also, the neutron detectors provide
n/γ pulse shape discrimination with FOM factor >2. Here we give a detailed description of
design and electronics of the detectors and discuss their performance in BM@N run with 3.8
A GeV Xe ion beam and CsI target.
| Position | Lead electronic engineer |
|---|---|
| Affiliation | JINR LHEP |
| Country | Russia |