Instrumentation for position sensitive detector-powder diffractometer at CENM-Maamora

Linear position sensitive detectors are widely used to configure neutron diffractometer and other instruments. Necessary front-end electronics and data acquisition system was developed to fulfil such instruments built around the research reactor. In this paper, the front-end electronics dedicated to the neutron powder diffractometer which will be installed in the axial beam port of the Triga MarkII research reactor (Center of Nuclear Studies of Maamora) is described. It consists of High voltage power supply, a Position-decoder and a Multichannel analyzer and data acquisition software. The ³He-PSD detector response exposed to the neutron flow emitted by ²⁵²Cf source held in paraffin spheres with distinct thicknesses for moderation effect, is shown. Monte-Carlo NParticles code (MCNP) simulations were also performed to study both the detector performance and the paraffin efficiency.