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Spectroscopic diagnostics of extended corona and solar wind with UVCS/SpartanThe primary goal of the Ultraviolet Coronal Spectrometer on Spartan 201 (UVCS/Spartan) is to make spectroscopic diagnostic measurements that can be used to derive plasma parameters in the extended solar corona where it is believed that significant heating of the corona and acceleration of the solar wind take place. Direct and indirect measurements of particle velocity distribution, thermal and non-thermal temperatures, and bulk outflow velocities are crucial to aid in the identification of physical processes that may be responsible for coronal heating and solar wind acceleration. UVCS/Spartan has made two flights in April 1993 and September 1994, the latter coinciding with the South Polar Passage of the Ulysses spacecraft. Observations were made of the large-scale structures and sub-structures of coronal holes and streamers at heliocentric heights between 1.5 solar radii and 3.5 solar radii. Measurements were made of H I Lyman-alpha intensities and profiles, and line intensities of minor ions like O(5+) and Fe(11+). We will present results from the flights and discuss how these measurements are used to constrain values for the proton thermal and non-thermal kinetic temperatures, proton bulk outflow velocities, and minor ion temperatures and bulk outflow velocities. Plans for the upcoming flight in July 1995 will also be discussed.
Document ID
19960021264
Document Type
Conference Paper
Authors
Strachan, L.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA United States)
Gardner, L. D.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA United States)
Kohl, J. L.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA United States)
Date Acquired
August 17, 2013
Publication Date
June 30, 1995
Publication Information
Publication: International Solar Wind 8 Conference
Subject Category
Solar Physics
Accession Number
96N24660
Funding Number(s)
CONTRACT_GRANT: NAG5-613
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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