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Título: | Study of ionization charge density-induced gain suppression in LGADs |
Autor: | Jiménez-Ramos, M. C. CSIC ORCID; García López, J. CSIC ORCID; García-Osuna, Adrián; Vila, Iván CSIC ORCID; Currás, Esteban CSIC ORCID ; Jaramillo, R. CSIC ORCID ; Hidalgo, Salvador ; Pellegrini, Giulio CSIC ORCID | Palabras clave: | LGAD Bragg peak IBIC Microplasma generation TRIBIC Gain suppression |
Fecha de publicación: | 2022 | Editor: | Multidisciplinary Digital Publishing Institute | Citación: | Sensors 22(3): 1080 (2022) | Resumen: | 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. | Descripción: | This article belongs to the Section Physical Sensors. | Versión del editor: | https://doi.org/10.3390/s22031080 | URI: | http://hdl.handle.net/10261/280045 | DOI: | 10.3390/s22031080 | E-ISSN: | 1424-8220 |
Aparece en las colecciones: | (IFCA) Artículos (IMB-CNM) Artículos (CNA) Artículos |
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studyLGA.pdf | 8,05 MB | Adobe PDF | Visualizar/Abrir |
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