Performance of the large scale HV-CMOS pixel sensor MuPix8

The Mu3e experiment is searching for the charged lepton flavour violating decay\break μ+→e+e−e+, aiming for an ultimate sensitivity of one in 1016 decays. In an environment of up to 109 muon decays per second the detector needs to provide precise vertex, time and momentum information to suppress acc...

Full description

Saved in:
Bibliographic Details
Published in:Journal of instrumentation 2019-10, Vol.14 (10), p.C10011-C10011
Main Authors: Augustin, H., Berger, N., Blattgerste, C., Dittmeier, S., Ehrler, F., Grzesik, C., Hammerich, J., Herkert, A., Huth, L., Immig, D., Kozlinskiy, A., Köppel, M., Kröger, J., Meier, F., Gonzales, A. Meneses, Müller, M., Noehte, L., Perić, I., Prathapan, M., Rudzki, T., Schimassek, R., Schöning, A., Sorokin, I., Stieler, F., Tyukin, A., Wagner, T., Wauters, F., Weber, A., Wiedner, D., Zhang, H., Zimmermann, M.
Format: Article
Language:English
Subjects:
Active pixel sensors
CMOS
Data transmission
Decay rate
Flavors
Leptons
Momentum
Particle decay
Pixels
Scintillating fibers
Thin films
Trajectory measurement
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The Mu3e experiment is searching for the charged lepton flavour violating decay\break μ+→e+e−e+, aiming for an ultimate sensitivity of one in 1016 decays. In an environment of up to 109 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 50μm thin High Voltage Monolithic Active Pixel Sensors (HV-MAPS) placed in a 1T 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 180nm HV-CMOS process. It consists of three sub-matrices, each providing an untriggered datastream of more than 10MHits/s. The latest results from laboratory and testbeam characterisation are presented, showing an excellent performance with efficiencies >99.6% and a time resolution better than 10ns achieved with time walk correction.
ISSN:1748-0221
1748-0221
DOI:10.1088/1748-0221/14/10/C10011