We have carried out a scanning of the neutron efficiency with respect to the position along the Z-axis (AIDA and BEAM hole) of a 252Cf neutron source. A preliminary analysis is presented based on data from the online. A plot with the comparison of the simulations and experimental data is attached. The experimental results are in good agreement with the GEANT4 simulations of the studies for design of the neutron detector. The simulations for the design of the hybrid mode were calculated using 148 3He counters. The  version of the hybrid detector assembled during the current campaign (July-2016)  is using 140 3He counters. The missing counters correspond to tubes located on the outer part of PE, thus the effect of these counters on the total neutron efficiency is minimal.