The Belle II Pixel Detector for the SuperKEKB Flavour Factory

The upgrade of the KEKB e+e − asymmetric energy collider in Tsukuba, Japan to SuperKEKB will increase the instantaneous luminosity by a factor of 40. A significant increase in background and data rate of the vertex detector is expected, which cannot be handled by the current Belle design. To cope with these demands a new inner detector is under development and it is currently being extensively tested. This paper describes the DEPFET technology used for the pixel detector with its key features which proved to be a suitable solution for the Belle II detector. In addition, all involved readout electronics as well as the DAQ system are presented. The latest test beam campaign and its results are also described