Mainz 2014 – scientific programme

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T: Fachverband Teilchenphysik

T 64: Halbleiter 4

T 64.9: Talk

Tuesday, March 25, 2014, 18:45–19:00, P109a

A method for precise single pixel charge reconstruction for fast hybrid pixel detectors — •David-Leon Pohl, Fabian Hügging, Jens Janssen, and Norbert Wermes — Physikalisches Institut der Universität Bonn

The increasing luminosity in high energy physics requires progressively faster pixel detectors that are able to cope with high pixel occupancies. This is usually achieved by trading the charge resolution of the Front-End electronics for fast counting capabilities. With a poor charge resolution a calibration of the pixel detector or a sensor characterization is challenging. Hence a new method was developed to reconstruct the charge in single pixels with a resolution mainly limited by the electronic noise of the Front-End. The method makes use of the capability to change the hit detection threshold of the detector in small steps, while counting hits from a particle source with constant rate. During the talk the method will be presented in detail and the performance will be shown based on measurements with the ATLAS FE-I4 read out chip.