The Mid-Infrared Instrument for the James Webb Space Telescope, VIII: The MIRI Focal Plane System

Creators: Ressler, M. E.; Sukhatme, K. G.; Franklin, B. R.; Mahoney, J. C.; Thelen, M. P.; Bouchet, P.; Colbert, J. W.; Cracraft, Misty; Dicken, D.; Gastaud, R.; Goodson, G. B.; Eccleston, Paul; Moreau, V.; Rieke, G. H.; Schneider, Analyn

Abstract

We describe the layout and unique features of the focal plane system for MIRI. We begin with the detector array and its readout integrated circuit (combining the amplifier unit cells and the multiplexer), the electronics, and the steps by which the data collection is controlled and the output signals are digitized and delivered to the JWST spacecraft electronics system. We then discuss the operation of this MIRI data system, including detector readout patterns, operation of subarrays, and data formats. Finally, we summarize the performance of the system, including remaining anomalies that need to be corrected in the data pipeline.

Additional Information

© 2015. The Astronomical Society of the Pacific. Received 2014 August 17. Accepted 2015 April 29. The work presented is the effort of the entire MIRI team and the enthusiasm within the MIRI partnership is a significant factor in its success. MIRI draws on the scientific and technical expertise many organizations, as summarized in Papers I and II. A portion of this work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. In addition, Alan Hoffman and Peter Love were central to the development of the MIRI arrays at RVS before their retirements. We also thank John Drab for overseeing the completion of the arrays and George Domingo for his advice and assistance throughout. Craig McCreight, Mark McKelvey, and Bob McMurray led early work to demonstrate the large format Si:As IBC arrays. Thanks to Hyung Cho and Johnny Melendez of JPL for many hours invested in testing the SCAs and FPS system. The research described in this paper was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. Additional support was provided through NASA grant NNX13AD82G, and by the Centre Nationale D'Etudes Spatiales (CNES), UK Science and Technology Facilities Council, and the UK Space Agency.

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