PSD11: The 11th International Conference on Position Sensitive Detectors

Test-beam activities and results for the ATLAS ITk pixel detector

8 Sept 2017, 09:40

20m

Berrill Lecture Theatre (OU)

Talk Detectors for high energy physics and astrophysics (IV)

Speaker

Tobias Bisanz (Georg-August-Universitaet Goettingen (DE))

Description

The Phase-II upgrade of the LHC will result in an increase of the instantaneous
luminosity up to about $5\times {10}^{34}$ cm${}^{-2}$s${}^{-1}$. To cope with the
challenges the current Inner Detector will be replaced by an all-silicon Inner Tracker (ITk)
system. The Pixel Detector will have to deal with occupancies of about 300~hits/FE/s
as well as a fluence of $2\times {10}^{16}{\mathrm{n}}_{\mathrm{eq}}{\mathrm{cm}}^{-2}$.
Various sensor layouts are under development, aiming at providing a high performance, cost effective
pixel instrumentation to cover an active area of about 10~m${}^2$. These range from thin
planar silicon, over 3D silicon, to active CMOS sensors.
After extensive characterization of the sensors in the lab, their charge collection
properties and hit efficiency are measured in common testbeam campaigns, which provide
valuable feedback for improvements of the layout. Testbeam measurements of the final prototypes
will be used for the decision of which sensor types will be installed in ITk.
The setups used in the ITk Pixel testbeam campaigns will be presented, including the common
track reconstruction and analysis software. Results from the latest measurements will be shown,
highlighting some of the developments and challenges for the ITk Pixel sensors.