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Inverse Low Gain Avalanche Detectors (iLGADs) for precise tracking and timing applications | | E. Currás
; M. Carulla
; M. Centis Vignali
; J. Duarte-Campderros
; M. Fernández
; D. Flores
; A. García
; G. Gómez
; J. González
; S. Hidalgo
; R. Jaramillo
; A. Merlos
; M. Moll
; G. Pellegrini
; D. Quirion
; I. Vila
; | | Date: |
3 Apr 2019 | | Abstract: | Low Gain Avalanche Detector (LGAD) is the baseline sensing technology of the
recently proposed Minimum Ionizing Particle (MIP) end-cap timing detectors
(MTD) at the Atlas and CMS experiments. The current MTD sensor is designed as a
multi-pad matrix detector delivering a poor position resolution, due to the
relatively large pad area, around 1 $mm^2$; and a good timing resolution,
around 20-30 ps. Besides, in his current technological incarnation, the timing
resolution of the MTD LGAD sensors is severely degraded once the MIP particle
hits the inter-pad region since the signal amplification is missing for this
region. This limitation is named as the LGAD fill-factor problem. To overcome
the fill factor problem and the poor position resolution of the MTD LGAD
sensors, a p-in-p LGAD (iLGAD) was introduced. Contrary to the conventional
LGAD, the iLGAD has a non-segmented deep p-well (the multiplication layer).
Therefore, iLGADs should ideally present a constant gain value over all the
sensitive region of the device without gain drops between the signal collecting
electrodes; in other words, iLGADs should have a 100${\%}$ fill-factor by
design. In this paper, tracking and timing performance of the first iLGAD
prototypes is presented. | | Source: | arXiv, 1904.2061 | | Services: | Forum | Review | PDF | Favorites | |
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