EDET DH80k - characterization of a DePFET based sensor for TEM direct electron imaging
| Autor: | A. Wassatsch, Alexander Bähr, Eduard Prinker, Mitja Predikaka, Christian Koffmane, Rainer Richter, Johannes Treis, Jelena Ninkovic |
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| Rok vydání: | 2020 |
| Předmět: |
Physics
Nuclear and High Energy Physics Pixel 010308 nuclear & particles physics business.industry Dynamic range Signal compression 02 engineering and technology 01 natural sciences Signal law.invention 020210 optoelectronics & photonics Optics law Temporal resolution 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Beam dump business Instrumentation Sensitivity (electronics) Image resolution |
| Zdroj: | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 958:162544 |
| ISSN: | 0168-9002 |
| DOI: | 10.1016/j.nima.2019.162544 |
| Popis: | In recent years, commercially available camera systems for transmission electron microscopy have greatly improved their spatial resolution, whereas temporal resolution was side tracked due to it being non-essential in the imaging of stationary objects. Consequently, a system needed for investigation of dynamic processes, e.g. protein folding, is not yet available. Therefore, the EDET DH80k camera system with a full frame readout frequency of 80 kHz for a 1 Mpixel array is in development. Optimization steps were taken to improve spatial resolution by minimizing the impact of the multiple- and back-scattering of primary electrons. This is achieved by back-thinning of the sensor volume, removal of support layers and an optimized beam dump. With DePFET technology, a dynamic range of a minimum of 8 × 105 signal e − per pixel is achieved. An in-pixel signal compression is implemented by means of a nonlinear response function. Therefore, the sensitivity to single primary electrons as well as Poisson-limited sensitivity to numbers of 100 and more primary electrons is realized. In this paper, characterization measurements of the final pixel design are presented. |
| Databáze: | OpenAIRE |
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