Study of Ionization Charge Density-Induced Gain Suppression in LGADs
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 i...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-01-01
|
| Series: | Sensors |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1424-8220/22/3/1080 |
| _version_ | 1797484654150811648 |
|---|---|
| author | M. Carmen Jiménez-Ramos Javier García López Adrián García Osuna Iván Vila Esteban Currás Richard Jaramillo Salvador Hidalgo Giulio Pellegrini |
| author_facet | M. Carmen Jiménez-Ramos Javier García López Adrián García Osuna Iván Vila Esteban Currás Richard Jaramillo Salvador Hidalgo Giulio Pellegrini |
| author_sort | M. Carmen Jiménez-Ramos |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-09T23:07:33Z |
| format | Article |
| id | doaj.art-1663498969764316be8b89b10674e3c8 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-09T23:07:33Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-1663498969764316be8b89b10674e3c82023-11-23T17:50:10ZengMDPI AGSensors1424-82202022-01-01223108010.3390/s22031080Study of Ionization Charge Density-Induced Gain Suppression in LGADsM. Carmen Jiménez-Ramos0Javier García López1Adrián García Osuna2Iván Vila3Esteban Currás4Richard Jaramillo5Salvador Hidalgo6Giulio Pellegrini7Centro Nacional de Aceleradores (CNA), 41092 Sevilla, SpainCentro Nacional de Aceleradores (CNA), 41092 Sevilla, SpainCentro Nacional de Aceleradores (CNA), 41092 Sevilla, SpainInstituto de Física de Cantabria (IFCA-UC-CSIC), 39005 Cantabria, SpainSolid State Detector Group, CERN, CH-1211 Genéve 23, SwitzerlandInstituto de Física de Cantabria (IFCA-UC-CSIC), 39005 Cantabria, SpainInstituto de Microelectrónica de Barcelona (IMB-CNM, CSIC), Universitat Autònoma de Barcelona, 08193 Barcelona, SpainInstituto de Microelectrónica de Barcelona (IMB-CNM, CSIC), Universitat Autònoma de Barcelona, 08193 Barcelona, SpainGain 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.https://www.mdpi.com/1424-8220/22/3/1080LGADIBICTRIBICgain suppressionmicroplasma generationBragg peak |
| spellingShingle | M. Carmen Jiménez-Ramos Javier García López Adrián García Osuna Iván Vila Esteban Currás Richard Jaramillo Salvador Hidalgo Giulio Pellegrini Study of Ionization Charge Density-Induced Gain Suppression in LGADs Sensors LGAD IBIC TRIBIC gain suppression microplasma generation Bragg peak |
| title | Study of Ionization Charge Density-Induced Gain Suppression in LGADs |
| title_full | Study of Ionization Charge Density-Induced Gain Suppression in LGADs |
| title_fullStr | Study of Ionization Charge Density-Induced Gain Suppression in LGADs |
| title_full_unstemmed | Study of Ionization Charge Density-Induced Gain Suppression in LGADs |
| title_short | Study of Ionization Charge Density-Induced Gain Suppression in LGADs |
| title_sort | study of ionization charge density induced gain suppression in lgads |
| topic | LGAD IBIC TRIBIC gain suppression microplasma generation Bragg peak |
| url | https://www.mdpi.com/1424-8220/22/3/1080 |
| work_keys_str_mv | AT mcarmenjimenezramos studyofionizationchargedensityinducedgainsuppressioninlgads AT javiergarcialopez studyofionizationchargedensityinducedgainsuppressioninlgads AT adriangarciaosuna studyofionizationchargedensityinducedgainsuppressioninlgads AT ivanvila studyofionizationchargedensityinducedgainsuppressioninlgads AT estebancurras studyofionizationchargedensityinducedgainsuppressioninlgads AT richardjaramillo studyofionizationchargedensityinducedgainsuppressioninlgads AT salvadorhidalgo studyofionizationchargedensityinducedgainsuppressioninlgads AT giuliopellegrini studyofionizationchargedensityinducedgainsuppressioninlgads |