doi:10.1016/j.nima.2022.167030 ara Senger, Matias Borghi, Giacomo Boscardin, Maurizio Centis Vignali, Matteo Kilminster, Ben Macchiolo, Anna Paternoster, Giovanni Bisht, A Ficorella, F Hammad Ali, O Characterization of timing and spacial resolution of novel TI-LGAD structures before and after irradiation AIDAinnova-CONF-2023-002 The characterization of spacial and timing resolution of the novel Trench Isolated LGAD (TI-LGAD) technology is presented. This technology has been developed at FBK with the goal of achieving 4D pixels, where an accurate position resolution is combined in a single device with the precise timing determination for Minimum Ionizing Particles (MIPs). In the TI-LGAD technology, the pixelated LGAD pads are separated by physical trenches etched in the silicon. This technology can reduce the interpixel dead area, mitigating the fill factor problem. The TI-RD50 production studied in this work is the first one of pixelated TI-LGADs. The characterization was performed using a scanning TCT setup with an infrared laser and a strontium source setup. 2022 http://cds.cern.ch/record/2850805 10.1016/j.nima.2022.167030 http://cds.cern.ch/record/2850805