Performance of irradiated TI-LGADs at 120 GeV SPS pion beams

Trench-isolated (TI) LGADs, developed at FBK, are pixelated LGAD implementations where pads are separated by physical trenches etched within the silicon substrate and filled with a dielectric. Developed as an alternative approach to implant-based inter-pad separation (JTEs), this technology promises a dramatic reduction in inefficient regions, mitigating fill factor issues inherent to small-pitch pixelated LGAD matrices. Through a dedicated 120 GeV SPS pion test beam campaign, the time resolution, efficiency, and inter-pad distance of carbon infused irradiated TI-LGADs is presented for Minimum Ionizing Particles (MIP). Fluences up to 1.5 × 10 15 n eq /cm 2 are evaluated, for single trench implementations with varied trench width. The combined timing and tracking readout used in this study, integrating Region of Interest (ROI) triggering, sub-μm multi-object alignment, multi-channel waveform digitization and achieving a 5–7 μm spatial resolution through a MIMOSA26 telescope, are also reviewed. Preliminary results are discussed for temperatures of -25°C.