Vertex detector for BELLE II

Vertex detector for BELLE II

A DEPFET combines radiation detection and its signal amplification by integrating one Field-effect transistor on a completely depleted silicon substrate. Because of the very low Noise and the excellent spatial resolution are detectors made of DEPFET pixels attractive for X-ray astronomy, biomedical applications and for tracking particles in High energy experiments. For the vertex detector of the high luminosity upgrade of the Belle detector at KEK ("Belle II"), Japan, a highly granular pixel system with readout speeds of less than 20 µs is required. For this purpose, a DEPFET-based pixel detector is being developed and manufactured at the MPI for Physics.

The vertex detector for Belle II, which is to be used on the future SuperKEKB electron-positron accelerator, will consist of cylindrically arranged modules around the interaction point. Each module consists of an array of pixels, which are read out outside of the sensitive area. To reduce the impact of multiple scattering processes on the track reconstruction, any unnecessary material in the detector should be avoided. In particular, the detector itself should be made as thin as possible.

Go to Editor View