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Proceedings Paper

Precision spectro-polarimeter for high-resolution observations of solar magnetic fields
Author(s): Bruce W. Lites; David F. Elmore; Kim V. Streander; David L. Akin; Tom Berger; Dexter W. Duncan; Chris G. Edwards; Barbara Francis; Chris Hoffmann; Noah Katz; Michael Levay; Dnyanesh Mathur; William J. Rosenberg; Ericka Sleight; Theodore D. Tarbell; Alan M. Title; Darrel Torgerson
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Paper Abstract

As a Japanese National space mission with international collaboration, Solar-B (2005 launch) will carry a spectro- polarimeter (SP) to be operated in visible light to obtain the first high angular resolution, precision measurements of solar vector magnetic fields from space. The SP is part of the Focal Plane Package (FPP) fed by a diffraction-limited 50-cm optical telescope. The SP will be operated exclusively at the photospheric 630 nm Fe I lines. It features a rotating, low-order crystalline quartz retarder for polarization modulation and a reflecting Littrow spectrograph design that is shortened by using diffraction from the 12micrometers wide slit to fill the grating. Polarization analysis is accomplished by a modified Savart plate beam splitter. A custom CCD detector with two active areas, one for each beam from the beam splitter, allows continuous high duty-cycle sampling of polarization. The spectrograph slit will sample a 0.16 x 164 arcsec2 rectangle of the solar image, which may be scanned across the slit by up to +/- 160 arcsec in order to build up vector magnetic field maps of the solar photosphere. Along with simultaneous, co-spatial imaging and polarimetry with the filter imagers of the FPP, the SP will provide a precise view of active and quiet solar magnetic fields that control the structure, dynamics, and energetics of the upper solar atmosphere.

Paper Details

Date Published: 10 December 2001
PDF: 11 pages
Proc. SPIE 4498, UV/EUV and Visible Space Instrumentation for Astronomy and Solar Physics, (10 December 2001); doi: 10.1117/12.450047
Show Author Affiliations
Bruce W. Lites, National Ctr. for Atmospheric Research (United States)
David F. Elmore, National Ctr. for Atmospheric Research (United States)
Kim V. Streander, National Ctr. for Atmospheric Research (United States)
David L. Akin, Lockheed Martin Solar and Astrophysics Lab. (United States)
Tom Berger, Lockheed Martin Solar and Astrophysics Lab. (United States)
Dexter W. Duncan, Lockheed Martin Solar and Astrophysics Lab. (United States)
Chris G. Edwards, Lockheed Martin Solar and Astrophysics Lab. (United States)
Barbara Francis, Lockheed Martin Solar and Astrophysics Lab. (United States)
Chris Hoffmann, Lockheed Martin Solar and Astrophysics Lab. (United States)
Noah Katz, Lockheed Martin Solar and Astrophysics Lab. (United States)
Michael Levay, Lockheed Martin Solar and Astrophysics Lab. (United States)
Dnyanesh Mathur, Lockheed Martin Solar and Astrophysics Lab. (United States)
William J. Rosenberg, Lockheed Martin Solar and Astrophysics Lab. (United States)
Ericka Sleight, Lockheed Martin Solar and Astrophysics Lab. (United States)
Theodore D. Tarbell, Lockheed Martin Solar and Astrophysics Lab. (United States)
Alan M. Title, Lockheed Martin Solar and Astrophysics Lab. (United States)
Darrel Torgerson, Lockheed Martin Solar and Astrophysics Lab. (United States)


Published in SPIE Proceedings Vol. 4498:
UV/EUV and Visible Space Instrumentation for Astronomy and Solar Physics
Oswald H. W. Siegmund; Silvano Fineschi; Mark A. Gummin, Editor(s)

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