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

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 $Z n S (A g) /^{6} L i F$ -scintillation rings, each one of which is divided into 12 sections. Main parameters of this detector: covered solid angle $2 θ = {(133 - 175)}^{\circ}$ ; $Ω_{d} \approx 2.0$ sr; average absorption efficiency $85 %$ , geometric contribution to resolution $Δ d / d < 0.0005$ . The concept of a detector and its data acquisition system are presented.

Keywords

Neutron diffraction neutron detectors detector electronics

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