CeBr^sub 3^–based detector for gamma-ray spectrometer upgrade at JET

• Published in: Fusion engineering and design Vol. 123; p. 986
• Main Authors: Kwiatkowski, R, Boltruczyk, G, Broslawski, A, Gosk, M, Korolczuk, S, Mianowski, S, Szydlowski, A, Urban, A, Zychor, I, Braic, V, Pereira, R Costa, Craciunescu, T, Croft, D, Curuia, M, Fernandes, A, Goloborod’ko, V, Gorini, G, Kiptily, V, Lengar, I, Naish, J, Naish, R, Nocente, M, Schoepf, K, Santos, B, Soare, S, Tardocchi, M, Yavorskij, V, Zoita, VL
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier Science Ltd 01-11-2017
• Subjects: Computer simulation; Construction standards; Energy resolution; Fluxes; Fusion; Gamma rays; Nuclear reactions; Nuclear reactors; Scintillation counters; Sensors; Studies
• ISSN: 0920-3796; 1873-7196

One of the important techniques used at JET for studying fast ions is based on measurements of gamma-rays which are produced as a result of nuclear reactions between ions and plasma impurities. The intense neutron and gamma-ray fluxes expected during a DT campaign impose new requirements on detector characteristics used in such experiments. In addition to good energy resolution, detectors must also be characterized by a high signal-to-noise ratio and allow to perform measurements at high counting rate about 1 Mcps. The scintillators which fulfill these requirements are, among others, LaBr3:Ce, already tested at JET, and CeBr3 with a scintillation decay time of ∼20 ns. We report on measurements which were performed with a detector module equipped with a 3” × 3” CeBr3 scintillator and with an active voltage divider AVD@NCBJ, designed and constructed at NCBJ. Standard gamma-ray sources, as well as a PuBe source, were used for measurements. The comparison of measured and Monte Carlo simulated spectra is also presented.