[en] The tagged neutron technique (TNT) is analyzed in terms of its application for detecting dangerous substances hidden in underwater objects. The use of the technique for solving these problems is justified theoretically. The main characteristics of a prototype detector aimed at detecting explosives in a water environment are determined.

[en] Gamma detectors based on BGO crystals were designed and developed at the Joint Institute for Nuclear Research. These detectors are used in explosives and narcotics detection systems. Key specifications and design features of the detectors are presented. A software temperature-compensation method that makes it possible to stabilize the gamma detector response and operate the detector in a temperature range from −20 to 50°C is described.

[en] In this paper, specific features of operation of the calorimeter of the IHEP-JINR Neutrino Detector on the basis of liquid scintillation counters upgraded for time of flight particle identification are described. Data acquisition system, algorithms of response reconstruction, and calibration of calorimeter counters are described in detail. Estimate of time and spatial resolution of counters is obtained on tracks of vertical cosmic muons. The averaged time resolution is σ = 1.2 ns, and the coordinate resolution is σ = 13 cm.

[en] A project of the OLVE-HERO space detector is proposed for cosmic ray (CR) measurement in the range of 10¹²-10¹⁶ eV and will include a large ionization-neutron 3D calorimeter with a high granularity and geometric factor of ∼ 16 m²·sr. As the main OLVE-HERO detector, an image calorimeter of a boron loading of plastic scintillator with a tungsten absorber is to be applied. Such a calorimeter allows one to measure an additional neutron signal which will improve the energy resolution of the detector. Moreover, the rejection power between electromagnetic and nuclear CR components will be increased by a factor of 30-50 in the whole energy range. The boron loaded scintillator detector prototype has been designed and tested at the H8 beam test area at CERN SPS during Pb ion run in 2016 and Xe ion run in 2017. The results of the beam tests and the corresponding Monte-Carlo simulation are presented. (author)

[en] A project of the OLVE-HERO space detector for measurement of the cosmic rays in the range 10¹²–10¹⁶ eV is proposed. It will include a large ionization-neutron 3D calorimeter with a high granularity and geometric factor of ∼16 m² sr. The main OLVE-HERO detector is expected to be an image calorimeter with boron loaded plastic scintillator and a tungsten absorber. Such a calorimeter allows to measure an additional neutron signal that should improve the detector energy resolution and also the rejection power between electromagnetic and nuclear components of cosmic rays. Improvement by factor 30–50 is expected. The OLVE-HERO detector prototype was designed and tested at SPS CERN beam during Pb ion run in 2018. Test results and the corresponding Monte-Carlo simulation are presented.