Wide-aperture back-scattering detector (BSD) for the High-Resolution Fourier Diffractometer (HRFD) at the IBR-2 reactor

Article type: Research Article

Authors: Kruglov, V.V.^a | Balagurov, A.M.^a | Belova, M.O.^a | Bobrikov, I.A.^a | Bogdzel, A.A.^a | Bodnarchuk, V.I.^a | Bulavina, V.V.^a | Daulbaev, O.^{a; c; d} | Drozdov, V.A.^a | Zhuravlev, V.V.^a | Kirilov, A.S.^a | Kulikov, S.A.^a | Kurilkin, A.K.^a | Milkov, V.M.^a | Murashkevich, S.M.^a | Podlesnyy, M.M.^{a; b; *} | Prikhodko, V.I.^a | Churakov, A.V.^a | Shvetsov, V.V.^a

Affiliations: [a] Joint Institute for Nuclear Research (JINR), Dubna, Moscow region, 141980, Russian Federation | [b] Moscow Institute of Physics and Technology (National Research University), Dolgoprudny, Moscow region, 141701, Russian Federation | [c] The Institute of Nuclear Physics, Ministry of Energy of the Republic of Kazakhstan, 050032 Almaty, Kazakhstan | [d] Al-Farabi Kazakh National University, 050038 Almaty, Kazakhstan

Correspondence: [*] Corresponding author. E-mail: [email protected].

Abstract: The high-resolution Fourier diffractometer (HRFD) operates at the IBR-2 pulsed reactor, on which the correlation method of data registering has been implemented using a fast Fourier chopper and specialized electronics. A wide-aperture ring back-scattering detector for HRFD has been developed. The detector consists of six ZnS(Ag)/6LiF-scintillation rings, each one of which is divided into 12 sections. Main parameters of this detector: covered solid angle 2θ=(133−175)∘; Ωd≈2.0 sr; average absorption efficiency 85%, geometric contribution to resolution Δd/d<0.0005. The concept of a detector and its data acquisition system are presented.

Keywords: Neutron diffraction, neutron detectors, detector electronics

DOI: 10.3233/JNR-210001

Journal: Journal of Neutron Research, vol. 23, no. 4, pp. 243-250, 2021