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Proceedings Paper

Design of NEID, an extreme precision Doppler spectrograph for WIYN
Author(s): C. Schwab; A. Rakich; Q. Gong; S. Mahadevan; S. P. Halverson; A. Roy; R. C. Terrien; P. M. Robertson; F. R. Hearty; E. I. Levi; A. J. Monson; J. T. Wright; M. W. McElwain; C. F. Bender; C. H. Blake; J. Stürmer; Y. V. Gurevich; A. Chakraborty; L. W. Ramsey
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Paper Abstract

We have developed an optical design for a high resolution spectrograph in response to NASA’s call for an extreme precision Doppler spectrometer (EPDS) for the WIYN telescope. Our instrument covers a wavelength range of 380 to 930 nm using a single detector and with a resolution of 100,000. To deliver the most stable spectrum, we avoid the use of an image slicer, in favor of a large (195 mm diameter) beam footprint on a 1x2 mosaic R4 Echelle grating. The optical design is based on a classic white pupil layout, with a single parabolic mirror that is used as the main and transfer collimator. Cross dispersion is provided by a single large PBM2Y glass prism. The refractive camera consists of only four rotationally symmetric lenses made from i-Line glasses, yet delivers very high image quality over the full spectral bandpass. We present the optical design of the main spectrograph bench and discuss the design trade-offs and expected performance.

Paper Details

Date Published: 9 August 2016
PDF: 6 pages
Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 99087H (9 August 2016); doi: 10.1117/12.2234411
Show Author Affiliations
C. Schwab, Macquarie Univ. (Australia)
Australian Astronomical Observatory (Australia)
A. Rakich, GMTO Corp. (United States)
Q. Gong, NASA Goddard Space Flight Ctr. (United States)
S. Mahadevan, The Pennsylvania State Univ. (United States)
S. P. Halverson, The Pennsylvania State Univ. (United States)
A. Roy, The Pennsylvania State Univ. (United States)
R. C. Terrien, The Pennsylvania State Univ. (United States)
P. M. Robertson, The Pennsylvania State Univ. (United States)
F. R. Hearty, The Pennsylvania State Univ. (United States)
E. I. Levi, The Pennsylvania State Univ. (United States)
A. J. Monson, The Pennsylvania State Univ. (United States)
J. T. Wright, The Pennsylvania State Univ. (United States)
M. W. McElwain, NASA Goddard Space Flight Ctr. (United States)
C. F. Bender, The Pennsylvania State Univ. (United States)
C. H. Blake, Univ. of Pennsylvania (United States)
J. Stürmer, The Univ. of Chicago (United States)
Y. V. Gurevich, Landessternwarte Heidelberg (Germany)
A. Chakraborty, Physical Research Lab. (United States)
L. W. Ramsey, The Pennsylvania State Univ. (United States)


Published in SPIE Proceedings Vol. 9908:
Ground-based and Airborne Instrumentation for Astronomy VI
Christopher J. Evans; Luc Simard; Hideki Takami, Editor(s)

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