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Proceedings Paper

The 123 mm 8kX3k e2v/Ohio State CCD231-68 for MODS
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Paper Abstract

As is only fitting, the largest Optical/Infrared Telescope (the Large Binocular Telescope, LBT) has the two largest telescope-mounted spectrographs (MODS) and the MODS's have the four largest scientific CCDs. We describe herein the design, fabrication and early use of the e2v CCD231-68 8k × 3k 15 micron back-illuminated detector designed specifically for low and intermediate resolution multi-object spectroscopy on large telescopes. The 123 mm length of the CCD231-68 is the largest of any scientific CCD. The device can be read out in full frame mode to cover the whole 6 arc-min slit length of MODS, in full frame mode for multi-object spectroscopy with short slits, or in split frame transfer mode to allow readout while integrating subsequent exposures. The four very low noise (<2 e- RMS at 100 kPixels/second) outputs are located at the ends of the four 4k serial registers. Excellent CTE (five-9s5 per Pixel) insures good photometric accuracy across the device. Backthinned red and blue optimized variants are used on the corresponding channels of both MODS.

Paper Details

Date Published: 24 July 2008
PDF: 9 pages
Proc. SPIE 7021, High Energy, Optical, and Infrared Detectors for Astronomy III, 702108 (24 July 2008); doi: 10.1117/12.789169
Show Author Affiliations
Bruce Atwood, The Ohio State Univ. (United States)
Paul Jorden, e2v technologies PLC (United Kingdom)
Peter Pool, e2v technologies PLC (United Kingdom)

Published in SPIE Proceedings Vol. 7021:
High Energy, Optical, and Infrared Detectors for Astronomy III
David A. Dorn; Andrew D. Holland, Editor(s)

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