University Of Texas Electrographic Imaging Laboratory: Mark Ii Camera Performance Update And Current Projects

J. M. Holm; P. J. Griboval

doi:10.1117/12.968087

13 October 1986 University Of Texas Electrographic Imaging Laboratory: Mark Ii Camera Performance Update And Current Projects

J. M. Holm, P. J. Griboval

Author Affiliations +

Proceedings Volume 0627, Instrumentation in Astronomy VI; (1986) https://doi.org/10.1117/12.968087
Event: 1986 Astronomy Conferences, 1986, Tucson, United States

Abstract

The importance of several unique features of the design of the Mark II camera has been proven in use over the past few years. The camera is now completely operational, and the maintenance laboratory has been moved to the observatory at Mount Locke. Recent improvements include: better baking; a new o-ring preparation utilizing high vacuum baking, aluminization, and oxidation; a new rough pumping system that eliminates waiting for pumpdown and reduces the risk of damage due to leaks and user error; a complete users manual; and a cassette magazine for the film. Photocathode lifetimes are now very long, and the photometric and astrometric properties of the camera have been documented. The reliability of the camera is now unsurpassed by any other instrument at McDonald. New projects include: the construction of an already designed motorized tracking guider; completion of the mechanical design and construction of a focal reducer for the 2.1m telescope; the production of K2CsSb(0) photocathodes to increase sensitivity and spectral range; the construction of a new film outgassing bench to allow large numbers of plates to be taken in one night; the installation of a CCD at the electronic focus of the Mark III camera; and the construction of the already designed 9cm., automatic, Mark IV camera.

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J. M. Holm and P. J. Griboval "University Of Texas Electrographic Imaging Laboratory: Mark Ii Camera Performance Update And Current Projects", Proc. SPIE 0627, Instrumentation in Astronomy VI, (13 October 1986); https://doi.org/10.1117/12.968087

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