Tests of a prototype for the silicon tracking system of the ILD concept

A very robust and redundant tracking system is needed to fully exploit the physics potential at the future International Linear Collider. The International Large Detector uses a combination of a TPC surrounded in the barrel region by three double layers of silicon strip sensors as tracking system. In November 2009 a first test beam, including both a Large TPC Prototype and a first prototype of the silicon layers, was performed at DESY, Hamburg. About 80,000 events were recorded using an electron beam with a momentum of 5.6 GeV/c. The emphasis of this paper is on the silicon layers and their performance during the test beam. It presents first results from the data analysis and discusses possible future steps.