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Description
This study introduces second-generation front-end electronics design for side-readout detectors, with the ultimate goal of realizing near 100 ps CTR Time-of-Flight 3D Position Sensitive (TOF-3DPS) detectors. Leveraging a previously proposed timing signal multiplexing scheme based on RF amplifiers and summing circuits, this design utilizes complex programmable logic devices (CPLDs) and discrete components to facilitate high-precision measurements of energy and Depth of Interaction (DOI). Experimental results on a single 3×3×10 mm³ LYSO:Ce crystal demonstrated an 11.66% energy resolution, a 1.44±0.44 mm FWHM DOI resolution, and a ~112 ps FWHM DOI-calibrated CTR. Further tests on a detector unit comprising a 4×2 array of 3×3×10 mm³ LYSO:Ce crystals, side-coupled with a 4×6 array of 3.16×3.16 mm² SiPMs, yielded a 12.29±1.16% energy resolution and a DOI-calibrated CTR of 120.56±5.38 ps FWHM. The front-end circuit, designed to read out two detector units, occupies a compact footprint of only 27 mm × 95 mm, enabling easy integration and stacking of multiple units to form a complete TOF-3DPS detector module.
| Field | Detectors and electronics |
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