Universität zu Köln

Rieke, G. H., Ressler, M. E., Morrison, Jane E., Bergeron, L., Bouchet, Patrice, Garcia-Marin, Macarena, Greene, T. P., Regan, M. W., Sukhatme, K. G. and Walker, Helen (2015). The Mid-Infrared Instrument for the James Webb Space Telescope, VII: The MIRI Detectors. Publ. Astron. Soc. Pac., 127 (953). S. 665 - 675. CHICAGO: UNIV CHICAGO PRESS. ISSN 1538-3873

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Abstract

The MIRI Si: As IBC detector arrays extend the heritage technology from the Spitzer IRAC arrays to a 1024 x 1024 pixel format. We provide a short discussion of the principles of operation, design, and performance of the individual MIRI detectors, in support of a description of their operation in arrays provided in an accompanying paper. We then describe modeling of their response. We find that electron diffusion is an important component of their performance, although it was omitted in previous models. Our new model will let us optimize the bias voltage while avoiding avalanche gain. It also predicts the fraction of the IR-active layer that is depleted (and thus contributes to the quantum efficiency) as signal is accumulated on the array amplifier. Another set of models accurately predicts the nonlinearity of the detector-amplifier unit and has guided determination of the corrections for nonlinearity. Finally, we discuss how diffraction at the interpixel gaps and total internal reflection can produce the extended cross-like artifacts around images with these arrays at short wavelengths, similar to 5 mu m. The modeling of the behavior of these devices is helping optimize how we operate them and also providing inputs to the development of the data pipeline.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Rieke, G. H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ressler, M. E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Morrison, Jane E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bergeron, L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bouchet, Patrice UNSPECIFIED UNSPECIFIED UNSPECIFIED Garcia-Marin, Macarena UNSPECIFIED UNSPECIFIED UNSPECIFIED Greene, T. P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Regan, M. W. UNSPECIFIED UNSPECIFIED UNSPECIFIED Sukhatme, K. G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Walker, Helen UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-400602
DOI:	10.1086/682257
Journal or Publication Title:	Publ. Astron. Soc. Pac.
Volume:	127
Number:	953
Page Range:	S. 665 - 675
Date:	2015
Publisher:	UNIV CHICAGO PRESS
Place of Publication:	CHICAGO
ISSN:	1538-3873
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language ARRAY-CAMERA IRAC; MULTIBAND IMAGING PHOTOMETER; IN-FLIGHT PERFORMANCE; FOCAL-PLANE ARRAYS; REDUCTION ALGORITHMS; SPITZER; CALIBRATION Multiple languages Astronomy & Astrophysics Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/40060