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The sensor, fabricated in the trench-isolated TI-LGAD RD50 production batch at the FBK Foundry, enables a direct comparison between TI-LGAD and standard UFSD structures. This research aims to elucidate the isolation structure in the IP region and measure the IP distance between pads, comparing it to the nominal value provided by the vendor. Our findings reveal an unexpectedly strong signal induced near p-stops. This effect is amplified with increasing laser power, suggesting significant avalanche multiplication, and is also observed at moderate laser intensity and high HV bias. This investigation contributes valuable insights into the IP region\u2019s isolation structure and electric field effects on charge collection, providing critical data for the development of advanced sensor technology for the Compact Muon Selenoid (CMS) experiment and other high-precision applications.<\/jats:p>","DOI":"10.3390\/s23156746","type":"journal-article","created":{"date-parts":[[2023,7,28]],"date-time":"2023-07-28T07:58:52Z","timestamp":1690531132000},"page":"6746","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Exploring the Interpad Gap Region in Ultra-Fast Silicon Detectors: Insights into Isolation Structure and Electric Field Effects on Charge Multiplication"],"prefix":"10.3390","volume":"23","author":[{"given":"Gordana","family":"La\u0161tovi\u010dka-Medin","sequence":"first","affiliation":[{"name":"Faculty of Natural Sciences and Mathematics, University of Montenegro, Dzordza Vashingtona, 81000 Podgorica, Montenegro"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5823-2432","authenticated-orcid":false,"given":"Mateusz","family":"Rebarz","sequence":"additional","affiliation":[{"name":"ELI Beamlines Facility, The Extreme Light Infrastructure ERIC, Za Radnic\u00ed 835, 25241 Doln\u00ed B\u0159e\u017eany, Czech Republic"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jovana","family":"Doknic","sequence":"additional","affiliation":[{"name":"Faculty of Natural Sciences and Mathematics, University of Montenegro, Dzordza Vashingtona, 81000 Podgorica, Montenegro"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ivona","family":"Bozovic","sequence":"additional","affiliation":[{"name":"Faculty of Natural Sciences and Mathematics, University of Montenegro, Dzordza Vashingtona, 81000 Podgorica, Montenegro"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7580-384X","authenticated-orcid":false,"given":"Gregor","family":"Kramberger","sequence":"additional","affiliation":[{"name":"Jozef Stefan Institute, Jamova Cesta 39, 10 000 Ljubljana, Slovenia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5636-5197","authenticated-orcid":false,"given":"Tom\u00e1\u0161","family":"La\u0161tovi\u010dka","sequence":"additional","affiliation":[{"name":"Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 2, 18221 Prague 8, Czech Republic"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jakob","family":"Andreasson","sequence":"additional","affiliation":[{"name":"ELI Beamlines Facility, The Extreme Light Infrastructure ERIC, Za Radnic\u00ed 835, 25241 Doln\u00ed B\u0159e\u017eany, Czech Republic"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2023,7,28]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"12","DOI":"10.1016\/j.nima.2014.06.008","article-title":"Technology developments and first measurements of Low Gain Avalanche Detectors (LGAD) for high energy physics applications","volume":"765","author":"Pellegrini","year":"2014","journal-title":"Nucl. 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