18d64cd72f2dcf3fa2b36d997dd35f6d pmc_35161825.pdf 9e0a4d353eb500bad8e23c6f94eb4a24f4c8cfd9 pmc_35161825.pdf 3f126c5075d0dc4e097ea4d7f923ce9c114d20f3c0261fbbfb95c5e4095c0b77 pmc_35161825.pdf Title: Study of Ionization Charge Density-Induced Gain Suppression in LGADs Subject: Gain suppression induced by excess carriers in Low Gain Avalanche Detectors (LGADs) has been investigated using 3 MeV protons in a nuclear microprobe. In order to modify the ionization density inside the detector, Ion Beam Induced Current (IBIC) measurements were performed at different proton beam incidence angles between 0 and 85. The experimental results have been analyzed as a function of the ionization density projected on the multiplication layer, finding that the increase of ionization density leads to greater gain suppression. For bias voltages close to the gain onset value, this decrease in gain results into a significant distortion of the transient current waveforms measured by the Time-Resolved IBIC (TRIBIC) technique due to a deficit in the secondary holes component. For angles of incidence such that the Bragg peak falls within the sensitive volume of the detector, the formation of microplasmas modifies the behavior of the gain curves, producing an abrupt decrease in gain as the angle increases. Keywords: LGAD; IBIC; TRIBIC; gain suppression; microplasma generation; Bragg peak Author: M. Carmen Jiménez-Ramos, Javier García López, Adrián García Osuna, Iván Vila, Esteban Currás, Richard Jaramillo, Salvador Hidalgo and Giulio Pellegrini Creator: LaTeX with hyperref Producer: pdfTeX-1.40.21 CreationDate: Sun Jan 30 05:14:05 2022 CET ModDate: Sun Jan 30 05:16:23 2022 CET Custom Metadata: no Metadata Stream: no Tagged: no UserProperties: no Suspects: no Form: none JavaScript: no Pages: 17 Encrypted: no Page size: 595.276 x 841.89 pts (A4) Page rot: 0 File size: 8242359 bytes Optimized: no PDF version: 1.7 name type encoding emb sub uni object ID ------------------------------------ ----------------- ---------------- --- --- --- --------- CIQLLF+VnURWPalladioL Type 1 Custom yes yes no 10 0 PTDRGO+URWPalladioL-Bold Type 1 Custom yes yes no 15 0 WDPUEN+URWPalladioL-Roma Type 1 Custom yes yes no 20 0 YPMKVY+URWPalladioL-Ital Type 1 Custom yes yes no 24 0 VORBJF+CMSY10 Type 1 Builtin yes yes no 28 0 JYPLJJ+VnURWPalladioL-Bold Type 1 Custom yes yes no 32 0 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BCDEEE+PalatinoLinotype-Bold TrueType WinAnsi yes yes no 773 0 BCDFEE+PalatinoLinotype-Roman TrueType WinAnsi yes yes no 777 0 BCDGEE+PalatinoLinotype-Italic TrueType WinAnsi yes yes no 781 0 BCDHEE+PalatinoLinotype-Roman CID TrueType Identity-H yes yes yes 785 0 Jhove (Rel. 1.28.0, 2023-05-18) Date: 2024-05-07 04:34:40 CEST RepresentationInformation: pmc_35161825.pdf ReportingModule: PDF-hul, Rel. 1.12.4 (2023-03-16) LastModified: 2022-02-27 18:42:09 CET Size: 8242359 Format: PDF Version: 1.7 Status: Well-Formed and valid SignatureMatches: PDF-hul MIMEtype: application/pdf PDFMetadata: Objects: 914 FreeObjects: 1 IncrementalUpdates: 0 DocumentCatalog: PageLayout: SinglePage PageMode: UseNone Outlines: Item: Title: Introduction Destination: section.1 Item: Title: Experimental Details Destination: section.2 Children: Item: Title: LGADs Destination: subsection.2.1 Item: Title: Experimental Set-Up Destination: subsection.2.2 Item: Title: Results and Discussion Destination: section.3 Children: Item: Title: Detector Homogeneity and Structure Destination: subsection.3.1 Item: Title: Absolute Gain Curves in the Microplasma-Free Regime Destination: subsection.3.2 Item: Title: Absolute Gain Curves in the Microplasma Regime Destination: subsection.3.3 Item: Title: Conclusions Destination: section.4 Item: Title: References Destination: section.4 Info: Title: Study of Ionization Charge Density-Induced Gain Suppression in LGADs Author: M. Carmen Jiménez-Ramos, Javier García López, Adrián García Osuna, Iván Vila, Esteban Currás, Richard Jaramillo, Salvador Hidalgo and Giulio Pellegrini Subject: Gain suppression induced by excess carriers in Low Gain Avalanche Detectors (LGADs) has been investigated using 3 MeV protons in a nuclear microprobe. In order to modify the ionization density inside the detector, Ion Beam Induced Current (IBIC) measurements were performed at different proton beam incidence angles between 0 and 85. The experimental results have been analyzed as a function of the ionization density projected on the multiplication layer, finding that the increase of ionization density leads to greater gain suppression. For bias voltages close to the gain onset value, this decrease in gain results into a significant distortion of the transient current waveforms measured by the Time-Resolved IBIC (TRIBIC) technique due to a deficit in the secondary holes component. For angles of incidence such that the Bragg peak falls within the sensitive volume of the detector, the formation of microplasmas modifies the behavior of the gain curves, producing an abrupt decrease in gain as the angle increases. 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