Gain dependence on free carrier concentration in LGADs

Low gain avalanche detectors (LGADs) were investigated with transient current technique utilizing 1064 nm light to determine the effect of ionization density on the measured gain. The ionization density was varied with laser intensity and width of the beam spot. A model was derived explaining the de...

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Bibliographic Details
Published in:Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Accelerators, spectrometers, detectors and associated equipment, 2023-01, Vol.1046, p.167669, Article 167669
Main Authors: Kramberger, G., Hiti, B., Cindro, V., Howard, A., Mandić, I., Mikuž, M., Petek, M., Ristić, A., Ristić, G.
Format: Article
Language:English
Subjects:
Charge multiplication
Irradiations
Low Gain Avalanche Detectors
Time resolution
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Summary:Low gain avalanche detectors (LGADs) were investigated with transient current technique utilizing 1064 nm light to determine the effect of ionization density on the measured gain. The ionization density was varied with laser intensity and width of the beam spot. A model was derived explaining the decrease of gain due to the polarization of the gain layer, which reduces the electric field. The model was also tested at different ionization densities for LGADs of different gain layer design.
ISSN:0168-9002
1872-9576
DOI:10.1016/j.nima.2022.167669