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Performance of the large scale HV-CMOS pixel sensor MuPix8 | | H. Augustin
; N. Berger
; C. Blattgerste
; S. Dittmeier
; F. Ehrler
; C Grzesik
; J. Hammerich. A. Herkert
; L. Huth
; D. Immig
; A. Kozlinskiy
; M. Köppel
; J. Kröger
; F. Meier
; A. Meneses Gonzales
; M. Müller
; L. Noehte
; I. Perić
; M. Prathapan
; T. Rudzki
; R.Schimassek
; A. Schöning
; I. Sorokin
; F. Stieler
; A. Tyukin
; T. Wagner
; A. Weber
; D. Wiedner
; H. Zhang
; M. Zimmermann
; | | Date: |
22 May 2019 | | Abstract: | The Mu3e experiment is searching for the charged lepton flavour violating
decay $ mu^+
ightarrow e^+ e^- e^+ $, aiming for an ultimate sensitivity of
one in $10^{16}$ decays. In an environment of up to $10^9$ muon decays per
second the detector needs to provide precise vertex, time and momentum
information to suppress accidental and physics background. The detector
consists of cylindrical layers of $50, mu ext{m}$ thin High Voltage
Monolithic Active Pixel Sensors (HV-MAPS) placed in a $1, ext{T}$ magnetic
field. The measurement of the trajectories of the decay particles allows for a
precise vertex and momentum reconstruction. Additional layers of fast
scintillating fibre and tile detectors provide sub-nanosecond time resolution.
The MuPix8 chip is the first large scale prototype, proving the scalability of
the HV-MAPS technology. It is produced in the AMS aH18 $180, ext{nm}$
HV-CMOS process. It consists of three sub-matrices, each providing an
untriggered datastream of more than $10, ext{MHits}/ ext{s}$. The latest
results from laboratory and testbeam characterisation are presented, showing an
excellent performance with efficiencies $>99.6, ext{\%}$ and a time
resolution better than $10, ext{ns}$ achieved with time walk correction. | | Source: | arXiv, 1905.9309 | | Services: | Forum | Review | PDF | Favorites | |
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