Design of the ULTRASAT UV camera

Arooj Asif; Merlin F. Barschke; Benjamin Bastian-Querner; David Berge; Rolf Bühler; Nicola De Simone; Gianluca Giavitto; Juan M. Haces Crespo; Nirmal Kaipachery; Marek Kowalski; Shrinivasrao R. Kulkarni; Daniel Küsters; Sebastian Philipp; Heike Prokoph; Julian Schliwinski; Mikhail Vasilev; Jason J. Watson; Steven Worm; Francesco Zappon; Shay Alfassi; Sagi Ben-Ami; Adi Birman; Kasey Boggs; Greg Bredthauer; Amos Fenigstein; Avishay Gal-Yam; Dmitri Ivanov; Omer Katz; Ofer Lapid; Tuvia Liran; Ehud Netzer; Eran O. Ofek; Shirly Regev; Yossi Shvartzvald; Joseph Tufts; Dmitry Veinger; Eli Waxman

doi:10.1117/12.2594253

24 August 2021 Design of the ULTRASAT UV camera

Arooj Asif, Merlin F. Barschke, Benjamin Bastian-Querner, David Berge, Rolf Bühler, Nicola De Simone, Gianluca Giavitto, Juan M. Haces Crespo, Nirmal Kaipachery, Marek Kowalski, Shrinivasrao R. Kulkarni, Daniel Küsters, Sebastian Philipp, Heike Prokoph, Julian Schliwinski, Mikhail Vasilev, Jason J. Watson, Steven Worm, Francesco Zappon, Shay Alfassi, Sagi Ben-Ami, Adi Birman, Kasey Boggs, Greg Bredthauer, Amos Fenigstein, Avishay Gal-Yam, Dmitri Ivanov, Omer Katz, Ofer Lapid, Tuvia Liran, Ehud Netzer, Eran O. Ofek, Shirly Regev, Yossi Shvartzvald, Joseph Tufts, Dmitry Veinger, Eli Waxman

Author Affiliations +

Proceedings Volume 11821, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXII; 118210U (2021) https://doi.org/10.1117/12.2594253
Event: SPIE Optical Engineering + Applications, 2021, San Diego, California, United States

Abstract

The Ultraviolet Transient Astronomical Satellite (ULTRASAT) is a scientific UV space telescope that will operate in geostationary orbit. The mission, targeted to launch in 2024, is led by the Weizmann Institute of Science (WIS) in Israel and the Israel Space Agency (ISA). Deutsches Elektronen Synchrotron (DESY) in Germany is tasked with the development of the UV-sensitive camera at the heart of the telescope. The camera's total sensitive area of ≈90mm x 90mm is built up by four back-side illuminated CMOS sensors, which image a field of view of ≈200 deg². Each sensor has 22:4 megapixels. The Schmidt design of the telescope locates the detector inside the optical path, limiting the overall size of the assembly. As a result, the readout electronics is located in a remote unit outside the telescope. The short focal length of the telescope requires an accurate positioning of the sensors within ±50 μm along the optical axis, with a flatness of ±10 μm. While the telescope will be at around 295K during operations, the sensors are required to be cooled to 200K for dark current reduction. At the same time, the ability to heat the sensors to 343K is required for decontamination. In this paper, we present the preliminary design of the UV sensitive ULTRASAT camera.

Conference Presentation

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Arooj Asif, Merlin F. Barschke, Benjamin Bastian-Querner, David Berge, Rolf Bühler, Nicola De Simone, Gianluca Giavitto, Juan M. Haces Crespo, Nirmal Kaipachery, Marek Kowalski, Shrinivasrao R. Kulkarni, Daniel Küsters, Sebastian Philipp, Heike Prokoph, Julian Schliwinski, Mikhail Vasilev, Jason J. Watson, Steven Worm, Francesco Zappon, Shay Alfassi, Sagi Ben-Ami, Adi Birman, Kasey Boggs, Greg Bredthauer, Amos Fenigstein, Avishay Gal-Yam, Dmitri Ivanov, Omer Katz, Ofer Lapid, Tuvia Liran, Ehud Netzer, Eran O. Ofek, Shirly Regev, Yossi Shvartzvald, Joseph Tufts, Dmitry Veinger, and Eli Waxman "Design of the ULTRASAT UV camera", Proc. SPIE 11821, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXII, 118210U (24 August 2021); https://doi.org/10.1117/12.2594253

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