18-22 February 2019
Vienna University of Technology
Europe/Vienna timezone

EDET DH80k - Characterization of a DePFET based sensors for TEM Direct Electron Imaging

19 Feb 2019, 14:00
20m
EI7 ()

EI7

Talk Semiconductor Detectors Semiconductor Detectors

Speaker

Mitja Predikaka (Semiconductor Laboratory of the Max Planck Society)

Description

The EDET DH80k is a 1 MPixel camera system, optimized for the direct detection of 300 keV electrons from a TEM equipped with a pulsed, high intensity electron source. It was designed to record stroboscopic movies of dynamic processes with unprecedented temporal and spatial resolution. The camera consists of four identical modules with the complete set of frontend and peripheral electronics required for standalone operation. The sensitive part of each module is a sensor array with 512 x 512 pixels of 60 µm x 60 µm each, which yields an overall sensitive area of 3 cm x 3 cm. The same area is back thinned to either 50 μm or 30 μm to minimize the multiple scattering of electrons. In combination with a beam-stop optimized for low backscattering of electrons, this results in an optimized line spread function. The sensor array is based on the DePFET pixel design, which is a highly modifiable combined sensor-amplifier structure, with an inherently high peak to background ratio and high speed readout capability. For the EDET DH80k camera a DePFET design with

  • a nonlinear in-pixel signal compression,
  • large (~$10^6$ electrons) dynamic range,
  • and a specialized readout scheme that allows for an 80 kHz frame rate

was developed.
Detailed results from the first measurements on pixel level with low noise measurement setup (SPIX) will be presented.

Primary author

Mitja Predikaka (Semiconductor Laboratory of the Max Planck Society)

Co-authors

Laci Andricek (MPG Semiconductor Lab) Alexander Bähr (MPG-HLL) Ibrahym Dourki (Max-Planck-Institute for Structure and Dynamics of Matter) Sascha Epp (Max Planck Institute for the Structure and Dynamics of Matter) Djordje Gitaric (Max-Planck-Institute for Structure and Dynamics of Matter) Mohammed Ibrahim (Semiconductor Laboratory of the Max Planck Society) Silvia Krivokuca (Semiconductor Laboratory of the Max Planck Society) Christian Koffmane (Halbleiterlabor der Max-Planck-Gesellschaft) Dwayne Miller (Max-Planck-Institute for Structure and Dynamics of Matter) Jelena Ninkovic (MPG Halbleiterlabor) Ivan Peric (KIT - Karlsruhe Institute of Technology (DE)) Mikhail Polovykh (Semiconductor Laboratory of the Max Planck Society) Eduard Prinker (Semiconductor Laboratory of the Max Planck Society) Rainer Richter (Halbleiterlabor der MPG) Gerhard Schaller (MPG Semiconductor Laboratory) Florian Schopper (MPG Semiconductor Laboratory) Johannes Treis (MPG Semiconductor Laboratory) Andreas Wassatsch (MPI Physik) Christian Zirr (Semiconductor Laboratory of the Max Planck Society)

Presentation Materials