ACHTUNG! Indico Wartung mit Dienstunterbrechung am Donnerstag dem 16.12.2021 von 10:00 Uhr - 11:00 Uhr (CET). Bitte beenden Sie ihre Arbeit rechtzeitig um Datenverlusten vorzubeugen!
ATTENTION! Indico Maintenance with downtime on Thu 16 Dec 2021, 10 - 11h CET. Please finish your work in time to prevent data loss!
16-19 January 2018
Zurich, Switzerland
Europe/Berlin timezone

Characterization of prototypes for the CMS Phase II pixel sensors

19 Jan 2018, 11:10
ETH HG E 1.2 (Zurich, Switzerland)

ETH HG E 1.2

Zurich, Switzerland

Rämistrasse 101, 8092 Zürich, Schweiz


Ms Caroline Niemeyer (University of Hamburg)


For the HL- LHC the irradiation level that the detectors will have to withstand will be reaching a 1 MeV neutron equivalent fluence of 2×10^16neq/cm2 and a total ionizing dose of 10 MGy at the location where the sensors of the Inner Tracker will be installed. The upgraded Phase-2 Inner Tracker is designed to maintain or improve the tracking and vertexing capabilities under these high pileup and radiation conditions. Various pixel sensor designs have been fabricated and bump bonded to ROC4Sens read-out chips and are evaluated for radiation hardness, spatial resolution and charge collection efficiency as well as pixel hit efficiency using the DESY test beam facilities. The shallow angle method is used to measure the depletion depth and possibly trapping effects due to irradiation as the track passes the pixel cells in varying depths. The edge-on method allows for in-silicon tracking and thus to obtain the intrinsic position resolution of the silicon sensors without using an external reference tracking detector. The results of these measurement methods on the new pixel sensor designs will be presented.

Primary authors

Ms Caroline Niemeyer (University of Hamburg) Mr Finn Feindt (University of Hamburg)


Dr Aliakbar Ebrahimi (University of Hamburg) Dr Daniel Pitzl (Deutsches Elektronen-Synchrotron) Prof. Erika Garutti (University of Hamburg) Dr Georg Steinbrück (University of Hamburg) Ms Irene Zoi (University of Hamburg) Dr Jörn Schwandt (University of Hamburg)

Presentation Materials