Dortmund 2021 – scientific programme
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T: Fachverband Teilchenphysik
T 64: Pixel Detectors III
T 64.9: Talk
Wednesday, March 17, 2021, 18:00–18:15, Tn
Timing Study and Optimization of ATLASPix3 a full-scale HV-MAPS Prototype — H. Augustin1, F. Ehrler2, D.M. Immig1, •D. Kim1, L. Mandok1, L.O.S Noethe3, I. Perić2, M. Prathapan2, T.T. Rudzki1, R. Schimassek1, A. Schöning1, and A. Weber1,2 for the Mu3e collaboration — 1Physikalisches Institut Universität Heidelberg — 2Karlsruher Institut für Technologie — 3Paul Scherrer Institut
For the high luminosity upgrade at the Large Hadron Collider (HL-LHC), ATLAS will replace its tracking system. The instantaneous luminosity, that increases by 5-7 times with respect to the current LHC value, causes challenges in terms of radiation tolerance and readout speed. For this upgrade, the Inner Detector will be replaced by an all-silicon tracking detector, the Inner Tracker (ITk).
As a candidate for the outermost pixel layer, the ATLASPix3 was developed. It is a full scale prototype designed in an 180 nm HV-CMOS process by TSI. The pixel size is 150 μm x 50 μm, resulting in an active matrix consisting of 132 x 372 pixels with a total active area of 19.8 mm x 18.6 mm.
This presentation focuses on the study and optimization of the time resolution of ATLASPix3. As a result of these measurements, a configuration is found which leads to an efficiency of 99.6 % with an uncorrected time resolution of 7.7 ns. After offline correction, this value can be improved to 4.5 ns.