DEPFET detectors for future electron-positron colliders

Abstract

The DEPFET Collaboration develops highly granular, ultra-thin pixel detectors for outstanding vertex reconstruction at future electron-positron collider experiments. A DEPFET sensor, by the integration of a field effect transistor on a fully depleted silicon bulk, provides simultaneous position sensitive detector capabilities and in pixel amplification. The characterization of the latest DEPFET prototypes has proven that a adequate signal-to-noise ratio and excellent single point resolution can be achieved for a sensor thickness of 50 micrometers. The close to final auxiliary ASICs have been produced and found to operate a DEPFET pixel detector of the latest generation with the required read-out speed. A complete detector concept is being developed for the Belle II experiment at the new Japanese super flavor factory. DEPFET is not only the technology of choice for the Belle II vertex detector, but also a prime candidate for the ILC. Therefore, in this contribution, the status of DEPFET R&D project is reviewed in the light of the requirements of the vertex detector at a future electron-positron collider.

DEPFET detectors for direct detection of MeV Dark Matter particles

“…In this way, the standard deviation of the mean can be considered to be the effective noise of the measurement. Devices based on the combined detector-amplifier structure DEPFET are applied for a variety of particle physics and astrophysical experiments [15][16][17]. In their most simple form, they provide an active pixel sensor with pixel-individual charge storage and readout at high speed with very good signalto-noise ratio (SNR).…”

Vertexing at the ILC

“…The pixels are read out using a rolling-shutter approach, where one row is constantly being read out. The goal is to take as many frames as possible to minimize occupancy, so currently about 1/50 µs for the entire frame [17]. A conceptual look at a DEPFET ladder, including all the required periphery, is shown in Fig.…”