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T: Fachverband Teilchenphysik

T 35: Halbleiter: F&E 2

T 35.8: Vortrag

Montag, 9. März 2015, 18:35–18:50, K.12.16 (K4)

A Fourfold Segmented Silicon Strip Sensor with Read-out at the Edges — Wim de Boer, Alexander Dierlamm, Frank Hartmann, Karl-Heinz Hoffmann, Andreas Kornmayer, Thomas Müller, Andreas Nürnberg, and •Martin Printz — Institut für Experimentelle Kernphysik (EKP), KIT

The High-Luminosity LHC upgrade (HL-LHC) is expected to increase the present luminosity by an order of magnitude in the years after 2022. This will necessitate the construction of silicon tracking detectors with a significantly higher radiation hardness and a higher channel granularity to cope with a higher track occupancy. In addition, a contribution from the tracking system to the Level-1 trigger and a reduction of the material budget would be desirable. The current concept for an upgraded CMS Tracker is based on silicon sensor modules as a sandwich of two strip sensors with front-end electronics at the sensor edge. This arrangement allows the use of the displacement of coincident hits as a means to discriminate between particles of different momenta, thereby reducing the amount of data to be sent to the trigger system.
This talk introduces a new strip sensor design with a fourfold segmentation along the strips. The inner strips have an offset of half a pitch with respect to the outer strips and are connected to the pre-amplifiers at the edge via routing lines in between the outer strips. The challenge lies in minimizing the induced signals on the routing lines. Several prototypes have been tested and the results are reported. The possible application for the CMS Tracker upgrade is discussed.