Researchers Demonstrate Improved Timing Resolution in Irradiated Trench-Isolated LGAD Detectors
A research team has published results from a test beam campaign evaluating trench-isolated LGADs (Low-Gain Avalanche Detectors), a silicon detector technology designed to improve tracking efficiency in high-energy physics experiments. The study measured timing resolution, detection efficiency, and performance degradation under radiation exposure up to 2.5×10¹⁵ neutron equivalents per square centimeter. The findings demonstrate that these detectors can achieve time resolution between 35-45 picoseconds, which is relevant for future particle physics experiments requiring precise 4D tracking capabilities.
Researchers from multiple institutions conducted a 120 GeV pion test beam campaign to evaluate trench-isolated LGADs (TI-LGADs), a pixelated detector technology developed at FBK that addresses inefficiencies in traditional LGAD designs by physically separating detector pads with trenches filled with dielectric material. The study examined carbon-infused irradiated devices at fluences up to 2.5×10¹⁵ neutron equivalents per square centimeter, operating at -25°C, with varying trench widths. Results showed optimal time resolution between 35-45 picoseconds across all tested devices, though the researchers observed degradation in inter-pad distance performance with increasing radiation exposure. These findings support the viability of TI-LGAD technology for next-generation particle physics experiments requiring precise timing and spatial resolution in high-radiation environments.
What different sources said
- arXiv physicsCenter
Tracking and timing measurements on irradiated TI-LGADs
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