Speaker
Description
The active fast neutron multiplicity counting apparatus was consisted of 26 pieces of liquid scintillator detectors in two rings layout, multi-board 500M14bit digitizers based on PXIe platform, the DT neutron generator which was located on the bottom of detector ring, the shielding cone with a hole for neutron injecting to the sample assay area and mechanical mounting structure. The DT neutron generator was the type of alpha-associated and each neutron injecting into the assay area can be tagged. The alpha signal was used as gating signal when doing active fast neutron multiplicity counting. A preliminary experiment was performed with 10kg HEU metal in standard container for technical verification of this alpha-gating active fast neutron multiplicity counting technology. The experimental results demonstrated this method works well and dramatically reduced the random or non-correlated neutron signal noise when the alpha signal gating was enabled.
