A new deep-depletion CCD for the red channel of the Palomar Double Spectrograph

Gustavo Rahmer; Roger M. Smith; Khanh Bui; Evan Kirby; Richard Dekany; Ernest Croner; Jennifer Milburn

doi:10.1117/12.926687

24 September 2012 A new deep-depletion CCD for the red channel of the Palomar Double Spectrograph

Gustavo Rahmer, Roger M. Smith, Khanh Bui, Evan Kirby, Richard Dekany, Ernest Croner, Jennifer Milburn

Proceedings Volume 8446, Ground-based and Airborne Instrumentation for Astronomy IV; 84462Z (2012) https://doi.org/10.1117/12.926687
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

Abstract

The red channel of the Palomar Double Spectrograph (DBSP) on the 200-inch Hale Telescope has been upgraded with a new deep-depletion CCD from LBNL. Its redder response produced a significant increase of the throughput above 550 nm, and its longer dimension more than doubled the spectral coverage. A special Dewar was designed to accommodate a detector mount which includes features to minimize CCD motion due to thermal cycling, in spite of the very simple "picture frame" packaging of the CCD. The new Dewar also includes some novel features to improve the liquid nitrogen hold time while staying within the size envelope allowed in the Cassegrain cage. We describe these changes along with the detector characterization.

Citation Download Citation

Gustavo Rahmer, Roger M. Smith, Khanh Bui, Evan Kirby, Richard Dekany, Ernest Croner, and Jennifer Milburn "A new deep-depletion CCD for the red channel of the Palomar Double Spectrograph", Proc. SPIE 8446, Ground-based and Airborne Instrumentation for Astronomy IV, 84462Z (24 September 2012); https://doi.org/10.1117/12.926687

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