| Title |
Investigating irradiation effects and space charge sign inversion in n-type Low Gain Avalanche Detectors |
| Authors |
Kraus, Veronika ; Biveinytė, Margarita ; Garcia, Marcos Fernandez ; Hidalgo, Salvador ; Moll, Michael ; Villegas, Jairo ; Wiehe, Moritz |
| DOI |
10.1016/j.nima.2025.170763 |
| Full Text |
|
| Is Part of |
Nuclear instruments and methods in physics research, Section A: Accelerators, spectrometers, detectors and associated equipment.. Amsterdam : Elsevier B.V.. 2025, vol. 1080, art. no. 170763, p. [1-4].. ISSN 0168-9002 |
| Keywords [eng] |
gain ; irradiation ; LGAD ; TPA-TCT ; type inversion |
| Abstract [eng] |
Low Gain Avalanche Detectors built on n-type substrate (nLGADs) have been developed by IMB-CNM to enhance the detection of low-penetrating particles, with a wide range of applications from medicine, industry to synergies with developments for high-energy physics (HEP). In this work, irradiation effects on nLGADs were investigated through proton irradiation at the CERN PS-IRRAD facility up to proton fluences of 1 × 1014 cm−2. Electrical characterization before and after irradiation reveals space charge sign inversion of the n-type bulk, leading to significant modifications in the depletion behavior and electric field distribution. Utilizing UV TCT and TPA-TCT measurements, the impact of irradiation on the electric fields and the gain are studied in more detail, confirming a change of sensor depletion and a reduced electric field in the gain layer. The results suggest that donor removal in nLGADs is stronger pronounced already at lower fluences compared to acceptor removal in traditional p-type LGADs. These findings provide not only first insights into the effects of irradiation on nLGADs but also contribute to the development of methods to quantify the donor removal. |
| Published |
Amsterdam : Elsevier B.V |
| Type |
Journal article |
| Language |
English |
| Publication date |
2025 |
| CC license |
|
