Dortmund 2021 – scientific programme
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T: Fachverband Teilchenphysik
T 64: Pixel Detectors III
T 64.8: Talk
Wednesday, March 17, 2021, 17:45–18:00, Tn
Position resolution with 25 µm pitch pixel sensors — •Irene Zoi1, Aliakbar Ebrahim3, Finn Feindt1, Erika Garutti1, Mohammadtaghi Hajheidari1, Andreas Hinzmann1, Caroline Niemeyer1, Daniel Pitzl2, Jörn Schwandt1, and Georg Steinbrück1 — 1Institut für Experimentalphysik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Deutschland — 2Deutsches Elektronen-Synchrotron, Notkestraße 85, 22607 Hamburg, Deutschland — 3PSI, Forschungsstrasse 111, 5232 Villigen PSI, Schweiz
The pixel pitch for vertex detectors has constantly been reduced to cope with the experiments’ necessities of achieving higher position resolution and maintaining low occupancy per channel. The spatial resolution takes advantage of a decreased pixel size but several factors, as radiation hardness, need to be considered in developing new prototypes. In the frame of the Phase-2 upgrade for the CMS pixel detector, the position resolution of 25 µm planar sensors has been investigated and compared to other existing measurements with various pitch size.
In this talk, the definition of resolution will be discussed as well as its significant dependence on the tracks selection criteria and the employed reference tracking system. For these measurements, three parallel planes of sensors have been used to achieve the necessary precision. The results are compared to what is obtained using a conventional test beam telescope. The dependence of the position resolution on the relative inclination between the incoming beam trajectory and the sensor is also presented.