9 July 2008 The upgrade of HARPS to a full-Stokes high-resolution spectropolarimeter
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We present the design of a compact module that converts the HARPS instrument at the 3.6-m telescope at La Silla to a full-Stokes high-resolution spectropolarimeter. The polarimeter will replace the obsolete Iodine cell inside the HARPS Cassegrain adapter. Utilizing the two fibers going into the spectrograph, two dual-beam systems can be positioned in the beam: one with a rotating superachromatic quarter-wave plate for circular polarimetry and one with a rotating superachromatic half-wave plate for linear polarimetry. A large polarimetric precision is ensured by the beam-exchange technique and a minimal amount of instrumental polarization. The polarimeter, in combination with the ultra-precise HARPS spectrograph, enables unprecedented observations of stellar magnetic fields and circumstellar material without compromising the successful planet-finding program.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Frans Snik, Frans Snik, Sandra Jeffers, Sandra Jeffers, Christoph Keller, Christoph Keller, Nikolai Piskunov, Nikolai Piskunov, Oleg Kochukhov, Oleg Kochukhov, Jeff Valenti, Jeff Valenti, Christopher Johns-Krull, Christopher Johns-Krull, } "The upgrade of HARPS to a full-Stokes high-resolution spectropolarimeter", Proc. SPIE 7014, Ground-based and Airborne Instrumentation for Astronomy II, 70140O (9 July 2008); doi: 10.1117/12.787393; https://doi.org/10.1117/12.787393


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