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Proceedings Paper

Preliminary design of the visible spectro-polarimeter for the Advanced Technology Solar Telescope
Author(s): Alfred G. de Wijn; Roberto Casini; Peter G. Nelson; Pei Huang
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Paper Abstract

The Visible Spectro-Polarimeter (ViSP) is one of the first light instruments for the Advanced Technology Solar Telescope (ATST). It is an echelle spectrograph designed to measure three different regions of the solar spectrum in three separate focal planes simultaneously between 380 and 900 nm. It will use the polarimetric capabilities of the ATST to measure the full Stokes parameters across the line profiles. By measuring the polarization in magnetically sensitive spectral lines the magnetic field vector as a function of height in the solar atmosphere can be obtained, along with the associated variation of the thermodynamic properties. The ViSP will have a spatial resolution of 0.04 arcsec over a 2 arcmin field of view (at 600 nm). The minimum spectral resolving power for all the focal planes is 180,000. The spectrograph supports up to 4 diffraction gratings and is fully automated to allow for rapid reconfiguration.

Paper Details

Date Published: 24 September 2012
PDF: 8 pages
Proc. SPIE 8446, Ground-based and Airborne Instrumentation for Astronomy IV, 84466X (24 September 2012); doi: 10.1117/12.926497
Show Author Affiliations
Alfred G. de Wijn, National Ctr. for Atmospheric Research (United States)
Roberto Casini, National Ctr. for Atmospheric Research (United States)
Peter G. Nelson, Sierra Scientific Solutions (United States)
Pei Huang, Consultant (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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