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Proceedings Paper

Extreme Doppler precision with octagonal fiber scramblers
Author(s): J. F. P. Spronck; Z. A. Kaplan; D. A. Fischer; C. Schwab; A. E. Szymkowiak
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Paper Abstract

The detection of Earth analogs with radial velocity requires long-term precision of 10 cm/s. One of the factors limiting precision is variation in instrumental profile from observation to observation due to changes in the illumination of the slit and spectrograph optics. Fiber optics are naturally efficient scramblers. Our research is focused on understanding the scrambling properties of fibers with different geometries. We have characterized circular and octagonal fibers in terms of focal ratio degradation, near-field and far-field distributions. We have characterized these fibers using a bench-mounted high-resolution spectrograph: the Yale Doppler Diagnostics Facility (YDDF).

Paper Details

Date Published: 24 September 2012
PDF: 10 pages
Proc. SPIE 8446, Ground-based and Airborne Instrumentation for Astronomy IV, 84468T (24 September 2012); doi: 10.1117/12.926340
Show Author Affiliations
J. F. P. Spronck, Yale Univ. (United States)
Z. A. Kaplan, Yale Univ. (United States)
D. A. Fischer, Yale Univ. (United States)
C. Schwab, Yale Univ. (United States)
A. E. Szymkowiak, Yale Univ. (United States)

Published in SPIE Proceedings Vol. 8446:
Ground-based and Airborne Instrumentation for Astronomy IV
Ian S. McLean; Suzanne K. Ramsay; Hideki Takami, Editor(s)

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