Development of a test beam telescope based on the ATLAS front end ASIC FE-I4

A beam telescope using FE-I4 readout chip based pixel modules of the ATLAS IBL upgrade was set up and tested. The data acquisition as well as the analysis were adopted from an already existing framework developed specifically for that purpose, namely EUDAQ and EUTelescope. By adding one FE-I4 based reference plane to the EUDET telescope, a region of interest trigger was implemented into the existing framework. Tests with this trigger were done using both the FE-I4 beam telescope as well as the EUDET telescope. A commissioning of the new trigger was done with a DEPFET sensor as device under test, showing that the data acquisition can be improved in terms of track efficiency to more than 80 %.