Design of the ULTRASAT UV camera
Authors:
Arooj Asif,
Merlin 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
, et al. (12 additional authors not shown)
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 th…
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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 mu along the optical axis, with a flatness of +-10 mu. 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.
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Submitted 3 August, 2021;
originally announced August 2021.
Realization and application of a 111 million pixel backside-illuminated detector and camera
Authors:
Norbert Zacharias,
Bryan Dorland,
Richard Bredthauer,
Kasey Boggs,
Greg Bredthauer,
Mike Lesser
Abstract:
A full-wafer, 10,580 $\times$ 10,560 pixel (95 $\times$ 95 mm) CCD was designed and tested at Semiconductor Technology Associates (STA) with 9 um square pixels and 16 outputs. The chip was successfully fabricated in 2006 at DALSA and some performance results are presented here. This program was funded by the Office of Naval Research through a Small Business Innovation in Research (SBIR) program…
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A full-wafer, 10,580 $\times$ 10,560 pixel (95 $\times$ 95 mm) CCD was designed and tested at Semiconductor Technology Associates (STA) with 9 um square pixels and 16 outputs. The chip was successfully fabricated in 2006 at DALSA and some performance results are presented here. This program was funded by the Office of Naval Research through a Small Business Innovation in Research (SBIR) program requested by the U.S. Naval Observatory for its next generation astrometric sky survey programs. Using Leach electronics, low read-noise output of the 111 million pixels requires 16 seconds at 0.9 MHz. Alternative electronics developed at STA allow readout at 20 MHz. Some modifications of the design to include anti-blooming features, a larger number of outputs, and use of p-channel material for space applications are discussed.
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Submitted 21 September, 2007;
originally announced September 2007.