Design of the ULTRASAT UV camera
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 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.
Cite
@article{arxiv.2108.01493,
title = {Design of the ULTRASAT UV camera},
author = {Arooj Asif and Merlin Barschke and Benjamin Bastian-Querner and David Berge and Rolf Bühler and Nicola De Simone and Gianluca Giavitto and Juan M. Haces Crespo and Nirmal Kaipachery and Marek Kowalski and Shrinivasrao R. Kulkarni and Daniel Küsters and Sebastian Philipp and Heike Prokoph and Julian Schliwinski and Mikhail Vasilev and Jason J. Watson and Steven Worm and Francesco Zappon and Shay Alfassi and Sagi Ben-Ami and Adi Birman and Kasey Boggs and Greg Bredthauer and Amos Fenigstein and Avishay Gel-Yam and Dmitri Ivanov and Omer Katz and Ofer Lapid and Tuvia Liran and Ehud Netzer and Eran O. Ofek and Shirly Regev and Yossi Shvartzvald and Joseph Tufts and Dmitry Veinger and Eli Waxman},
journal= {arXiv preprint arXiv:2108.01493},
year = {2021}
}
Comments
"UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXII", Proc. SPIE 11821, Optics and Photonics, 11821-21 (August, 2021). Contact authors Rolf Buehler ([email protected]) and Merlin Barschke ([email protected])