28 July 2014 Performance modeling of an upgraded NIRSPEC on Keck
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Abstract
NIRSPEC is a high-resolution near-infrared (1-5 micron) echelle spectrometer in use on the Keck II telescope. We are designing an upgrade to the spectrometer, and here we present modeling for the expected performance of the upgraded system. The planned upgrade will (1) replace the Aladdin III science detector with a Teledyne H2RG, (2) update the slitviewing camera (SCAM) detector to an H1RG and replace the optics, and (3) upgrade the instrument control electronics. The new spectrometer detector has smaller pixels but a larger format, and its improved noise characteristics will provide a dramatic increase in sensitivity, especially between OH lines in H-band and shorter wavelengths. Optical modeling shows that the upgraded system is expected to achieve higher spectral resolution and a larger spectral grasp. Also, preliminary modeling of the SCAM optical design aims to permit operation from 1-5 μm, overcoming a limitation with the existing system.
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Emily C. Martin, Emily C. Martin, Michael P. Fitzgerald, Michael P. Fitzgerald, Ian S. McLean, Ian S. McLean, Sean M. Adkins, Sean M. Adkins, Ted Aliado, Ted Aliado, George Brims, George Brims, Chris Johnson, Chris Johnson, Ken Magnone, Ken Magnone, Eric Wang, Eric Wang, Jason Weiss, Jason Weiss, } "Performance modeling of an upgraded NIRSPEC on Keck", Proc. SPIE 9147, Ground-based and Airborne Instrumentation for Astronomy V, 914781 (28 July 2014); doi: 10.1117/12.2056896; https://doi.org/10.1117/12.2056896
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