  We compare existing segmented plastic antineutrino detectors with our new
geometrically improved design for antineutrino detection and light collection
efficiency. The purpose of this study is to determine the most suitable design
style for remote reactor monitoring in the context of nuclear safeguards. Using
Monte Carlo based GEANT4 simulation package, we perform detector simulation
based on two prominent experiments: Plastic antineutrino detector array (Panda)
and Core monitoring by reactor antineutrino detector (Cormorad). In addition to
these two well-known designs, another concept, the Panda2, can be obtained by
making a small variation of Panda detector, is also considered in the
simulation. The results show that the light collection efficiency of the
Cormorad is substantially less with respect to the other two detectors while
the highest antineutrino detection efficiency is achieved with the Cormorad and
Panda2. Furthermore, as an alternative to these design choices, which are
composed of an array of identical rectangular-shaped modules, we propose to
combine regular hexagonal-shaped modules which minimizes the surface area of
the whole detector and consequently reduces the number of optical readout
channels considerably. With this approach, it is possible to obtain a detector
configuration with a slightly higher detection efficiency with respect to the
Panda design and a better energy resolution detector compared to the Cormorad
design.
