Gain recovery in heavily Irradiated Low Gain Avalanche Detectors by high temperature annealing
ID Mandić, Igor (Author), ID Cindro, Vladimir (Author), ID Gorišek, Andrej (Author), ID Hiti, Bojan (Author), ID Howard, Alissa (Author), ID Kljun, Žan (Author), ID Kramberger, Gregor (Author), ID Maček Kržmanc, Marjeta (Author), ID Mikuž, Marko (Author), ID Novak, Brigita (Author)

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Studies of annealing at temperatures up to 450 °C with Low Gain Avalanche Detectors (LGAD) irradiated with neutrons are described. It was found that the performance of LGADs irradiated with 1.5e15 n/cm$^2$ was already improved at 5 min of annealing at 250 °C. Isochronal annealing for 30 min in 50 °C steps between 300 °C and 450 °C showed that the largest beneficial effect of annealing is at around 350 °C. Another set of devices was annealed for 60 min at 350 °C and this annealing significantly increased depletion voltage of the gain layer (V$_{gl}$). The effect is equivalent to reducing the effective acceptor removal constant by a factor of ∼ 4. Increase of V$_{gl}$ is the consequence of increased effective space charge in the gain layer caused by formation of electrically active defects or re-activation of interstitial boron atoms.

Keywords:particle tracking detectors, radiation-hard detectors, solid state detectors, LGAD, annealing
Work type:Article
Typology:1.01 - Original Scientific Article
Organization:FMF - Faculty of Mathematics and Physics
Publication status:Published
Publication version:Version of Record
Number of pages:6 str.
Numbering:Vol. 1055, art. 168553
PID:20.500.12556/RUL-153066 This link opens in a new window
ISSN on article:0168-9002
DOI:10.1016/j.nima.2023.168553 This link opens in a new window
COBISS.SI-ID:161709315 This link opens in a new window
Publication date in RUL:15.12.2023
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Title:Nuclear instruments and methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment
Shortened title:Nucl. instrum, methods phys res., Sect. A, Accel.
COBISS.SI-ID:2289668 This link opens in a new window


License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.


Funder:ARRS - Slovenian Research Agency
Project number:P1-0135
Name:Eksperimentalna fizika osnovnih delcev

Funder:ARRS - Slovenian Research Agency
Project number:J1-1699
Name:Razvoj prostorsko občutljivega detektorja časa v eksperimentu ATLAS

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