  We report on the position, timing, and energy resolution of a range of
plastic scintillator bars and reflector treatments using dual-ended silicon
photomultiplier readout. These measurements are motivated by the upcoming
construction of an optically segmented single-volume neutron scatter camera, in
which neutron elastic scattering off of hydrogen is used to kinematically
reconstruct the source direction and energy of an incoming neutron. For this
application, interaction position resolutions of about 10 mm and timing
resolutions of about 1 ns are necessary to achieve the desired efficiency for
fission-energy neutrons. The results presented here indicate that this is
achievable with an array of $5\times5\times190~\mathrm{mm}^3$ bars of EJ-204
scintillator wrapped in Teflon tape, read out with SensL's J-series
$6\times6~\mathrm{mm}^2$ silicon photomultipliers. With two independent setups,
we also explore the systematic variability of the position resolution, and show
that, in general, using the difference in the pulse arrival time at the two
ends is less susceptible to systematic variation than using the log ratio of
the charge amplitude of the two ends. Finally, we measure a bias in the
absolute time of interactions as a function of position along the bar: the
measured interaction time for events at the center of the bar is $\sim$100 ps
later than interactions near the SiPM.
