  The response of a position-sensitive Li-glass based scintillation detector to
focused beams of 2.5 MeV protons and deuterons has been investigated. The beams
were scanned across the detector in 0.5 mm horizontal and vertical steps
perpendicular to the beams. Scintillation light was registered using an 8 by 8
pixel multi-anode photomultiplier tube. The signal amplitudes were recorded for
each pixel on an event-by-event basis. Several pixels generally registered
considerable signals at each beam location. The number of pixels above set
thresholds were investigated, with the optimization of the single-hit
efficiency over the largest possible area as the goal. For both beams, at a
threshold of ~50% of the mean of the full-deposition peak, ~80% of the events
were registered in a single pixel, resulting in an effective position
resolution of ~5 mm in X and Y.
