Ponente
Descripción
The Radiation Detectors and Plasma Diagnostics Division at the National Centre for Nuclear Research has been conducting research on scintillation detectors for neutron–gamma discrimination for over two decades. The team’s recent work included characterization of the Organic Glass Scintillator (OGS) and evaluation of its neutron–gamma discrimination performance compared to organic scintillators EJ-276, EJ-309, M600, and stilbene [1]. While single-crystal stilbene still provides the best overall discrimination, OGS is a strong competitor. Parallel studies examined the effect of light self‑absorption on pulse-shape discrimination in OGS samples of different sizes [2], and these effects are taken into account when scaling detector dimensions. In 2023, extensive studies were conducted on a novel polyurethane-based plastic scintillator, M600, and compared with the classic EJ-200 [3]. M600 proved to be a durable and cost-effective material for radiation detection in harsh environments, offering reliable neutron–gamma separation and increased resistance to ageing and humidity. Thanks to the group’s long-standing expertise, the NCBJ team is actively participating in the construction of the Vertical Neutron Camera (VNC) for the JT-60SA tokamak in Japan. At the workshop, a short presentation will be given on building neutron diagnostics for ToF-DONES and on performance tests of new scintillator compositions to be conducted using neutron beams at ToF-DONES.
[1] M. Grodzicka-Kobylka et al. Nucl. Instr. Meth. A Vol. 1077 (2025) 170559, DOI: 10.1016/j.nima.2025.170559
[2] L. Adamowski et al. ArXiv Vol. 2504.11963 (2025) 1-21, DOI: 10.48550/arXiv.2504.11963
[3] A. Syntfeld-Każuch et al. Nucl. Instr. Meth. Phys. Res. A Vol. 1068 (2024) 169764, DOI: 10.1016/j.nima.2024.169764