Computer Science – Software Engineering
Scientific paper
Sep 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989spie.1130..152r&link_type=abstract
IN: New technologies for astronomy; Proceedings of the Meeting, Paris, France, Apr. 25, 26, 1989 (A90-37976 16-89). Bellingham,
Computer Science
Software Engineering
2
Astronomical Spectroscopy, Charge Coupled Devices, Control Systems Design, Software Engineering, Astronomical Observatories, Controllers, Cryostats, Position Errors
Scientific paper
A split-field microscope has been used to align the CCDs with respect to a precision sapphire template, in order to circumvent the cumulative positioning errors plaguing large mosaics. A prototype 2 x 2 CCD mosaic has been aligned with errors of less than 3 microns. A novel CCD controller based on commercially available bus boards and CCD interface boards has been successfully tested and shown capable of reading out up to 16 CCDs in parallel. The CCD mosaics discussed are serviced by a newly designed cryostat possessing very high mechanical stability, which uses four built-in preamplifiers; noise levels of less than 5 electrons rms have been measured for the complete mosaic.
Bauer Harry
D'Odorico Sandro
Deiries Sebastian
Longinotti Antonio
Reiss Roland
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