Abstract—We report the development of a photosensor device based on a position-sensitive detector with a gallium arsenide (GaAs) cathode and a 16-element anode. In the case of asymmetric heterostatic circuit (electrodes combined in fours) its working field was limited by 10 mm (for a 18-mm photocathode). Implementing a scheme of analog coding of the coordinates of the centroids of electron avalanches arriving to the anode in the photosensor device made it possible to increase the field size to 14 mm and achieve a spatial resolution of 50 μm. The resulting photosensor device is used as the principal component of a multimode field photopolarimeter in observations with a microsecond time resolution on the 6-m telescope of the Special Astrophysical Observatory of the Russian Academy of Sciences. We report some of the results obtained in the process of this work.
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ACKNOWLEDGMENTS
We are grateful to our colleagues who took part in the development of the detectors based on new principles.
Funding
This work was carried out within the framework of “Fundamental Research” government contract of the Special Astrophysical Observatory of the Russian Academy of Sciences and the Federal program “Kazan Federal University Competitive Growth Program.” This work was supported by the Russian Foundation for Basic Research (projects nos. 04-02-17555, 06-02-08313, and 09-02-12053), INTAS (project no. 04-78-7366), and CRDF (project no. RP1-2394-MO-02). This work was partially supported by European Structural and Investment Fund and the Czech Ministry of Education, Youth and Sports (Project CoGraDS—CZ.02.1.01/0.0/0.0/15 003/0000437).
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Plokhotnichenko, V.L., Beskin, G.M., Karpov, S.V. et al. Photosensor Device Based on a 16-Electrode Position-Sensitive Detector with High Temporal Resolution. Astrophys. Bull. 75, 59–68 (2020). https://doi.org/10.1134/S199034132001006X
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DOI: https://doi.org/10.1134/S199034132001006X