The Visible Spectro-Polarimeter (ViSP) for the Advanced Technology Solar Telescope

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 1600nm. 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, along with the associated variation of the thermodynamic properties can be obtained. The ViSP will have a spatial resolution of 0.04 arc seconds over a 2 minute field of view (at 600nm). The minimum resolving power for all the focal planes is 180,000. The spectrograph supports up to 5 diffraction gratings and is fully automated to allow for rapid reconfiguration.

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Copyright 2010 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
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Author Nelson, Peter
Casini, Roberto
deWijn, Alfred
Knoelker, Michael
Publisher UCAR/NCAR - Library
Publication Date 2010-07-13T00:00:00
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Topic Category geoscientificInformation
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Metadata Date 2023-08-18T19:02:22.125824
Metadata Record Identifier edu.ucar.opensky::articles:18978
Metadata Language eng; USA
Suggested Citation Nelson, Peter, Casini, Roberto, deWijn, Alfred, Knoelker, Michael. (2010). The Visible Spectro-Polarimeter (ViSP) for the Advanced Technology Solar Telescope. UCAR/NCAR - Library. http://n2t.net/ark:/85065/d78054bn. Accessed 23 June 2025.

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