Results of PSAPD Timing Resolution Measurements
| Depth (mm) | Average single-crystal timing resolution (ns) | Maximum time shift between crystals (ns) | Timing resolution of whole array (ns) |
|---|---|---|---|
| 2 | 5.6 | 11.4 | 9.1 |
| 6 | 5.6 | 9.8 | 8.3 |
| 10 | 5.5 | 9.2 | 8.0 |
| 14 | 5.3 | 11.0 | 8.7 |
| 18 | 5.3 | 12.5 | 9.6 |
Timing resolution (FWHM) was measured between single PMT and dual-ended PSAPD. LSO array was 5 × 5 unpolished array with crystal size of 1.5 × 1.5 × 20 mm. Lower energy threshold was 350 keV.