<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" overflow="scroll" id="d1e137" altimg="si4.gif"><mml:mn>50</mml:mn><mml:mspace width="1em" class="nbsp"/><mml:mi mathvariant="normal">μ</mml:mi><mml:mi mathvariant="normal">m</mml:mi></mml:math>thin Low Gain Avalanche Detectors (LGAD) for timing applications

Carulla, M.; Doblas, Albert; Flores, D.; Galloway, Z.; Hidalgo, S.; Kramberger, G.; Luce, Z.; Mandić, I.; Mazza, S. M.; Merlos, A.; Pellegrini, G.; Quirion, D.; Rodriguez, Rene; Sadrozinski, H.F.-W.; Seiden, A.; Zhao, Y.

doi:10.1016/j.nima.2018.08.041

Cited by 24 publications

(9 citation statements)

References 8 publications

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“…By means of an iterative process, the thicknesses of both layers have been adjusted to obtain the best fitting calibration line for all experimental data (simulated deposited energy in Si vs centroid of the peaks). The values obtained, 1.5 µ m Al and 48 µ m Si, agree with those supplied by the IMB-CNM group (1.5 µ m Al and 44 µ m active volume + 4 µ m multiplication layer [14]). Through this iterative process, the calibration curve of the Multichannel Analyzer was also found (as shown in Figure 9).…”

Section: Detector Homogeneity and Structuresupporting

confidence: 88%

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Study of Ionization Charge Density-Induced Gain Suppression in LGADs

Jiménez-Ramos

López

Osuna

et al. 2022

Sensors

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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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Section: Detector Homogeneity and Structuresupporting

confidence: 88%

“…The samples studied in this work are a PIN and a LGAD detector manufactured by the Centro Nacional de Microelectrónica (IMB-CNM-CSIC) [14]. Both detectors come from the same wafer and underwent the same fabrication process and are identical except for the p + implant (gain layer) in the case of the LGAD.…”

Section: Lgadsmentioning

confidence: 99%

Study of Ionization Charge Density-Induced Gain Suppression in LGADs

Jiménez-Ramos

López

Osuna

et al. 2022

Sensors

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“…The radiation lengths for Si (X Si 0 =93.7 mm) and copper (X Cu 0 =14.36 mm) were extracted from [21] and FR4 (X FR4 0 =167.608 mm) from [22]. Standard LGAD sensors typically consist of a 300-350 µm thick silicon layer [23], which corresponds to a material budget of ≈ 0.32-0.37 % X/X 0 . Depending on the detector technology, the silicon sensor can also be mounted on a PCB.…”

Section: Setup Geometrymentioning

confidence: 99%

Feasibility study of a proton CT system based on 4D-tracking and residual energy determination via time-of-flight

Ulrich-Pur,

Bergauer,

Burker

et al. 2021

Preprint

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For dose calculations in ion beam therapy, it is vital to accurately determine the relative stopping power (RSP) distribution within the treated volume. Currently, RSP values are extrapolated from Hounsfield units (HU), measured with x-ray computed tomography (CT), which entails RSP inaccuracies due to conversion errors. A suitable method to improve the treatment plan accuracy is proton computed tomography (pCT). A typical pCT system consists of a tracking system and a separate residual energy (or range) detector to measure the RSP distribution directly. This paper introduces a novel pCT system based on a single detector technology, namely low gain avalanche detectors (LGADs). LGADs are fast 4D-tracking detectors, which can be used to simultaneously measure the particle position and time with precise timing and spatial resolution. In contrast to standard pCT systems, the residual energy is determined via a time-of-flight (TOF) measurement between different 4Dtracking stations. The design parameters for a realistic proton computed tomography system based on 4D-tracking detectors were studied and optimized using Monte Carlo simulations. The RSP accuracy and RSP resolution were measured inside the inserts of the CTP404 phantom to estimate the performance of the pCT system. After introducing a dedicated calibration procedure for the TOF calorimeter, RSP accuracies < 0.6 % could be achieved. Furthermore, the design parameters with the strongest impact on the RSP resolution were identified and a strategy to improve RSP resolution is proposed.

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“…In the so-called inverse LGAD (iLGAD) concept, on the other hand, the n+ electrode and the underlying gain layer are kept uniform entirely, and the segmentation is instead implemented at the p + ohmic contact electrode [22,23]. Another related line of research are capacitively (AC) coupled…”

Section: Pos(vertex2019)028mentioning

confidence: 99%

Radiation-tolerant Silicon Detectors for the LHC Phase-II Upgrade and Beyond: Review of RD50 Activities

Ott¹

2020

Proceedings of the 28th International Workshop on Vertex Detectors — PoS(Vertex2019)

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50μmthin Low Gain Avalanche Detectors (LGAD) for timing applications

Cited by 24 publications

References 8 publications

Study of Ionization Charge Density-Induced Gain Suppression in LGADs

Study of Ionization Charge Density-Induced Gain Suppression in LGADs

Feasibility study of a proton CT system based on 4D-tracking and residual energy determination via time-of-flight

Radiation-tolerant Silicon Detectors for the LHC Phase-II Upgrade and Beyond: Review of RD50 Activities

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