AffiliationLunar and Planetary Laboratory, University of Arizonas
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PublisherInstitute of Physics
CitationLivi, R., Larson, D. E., Kasper, J. C., Abiad, R., Case, A. W., Klein, K. G., Curtis, D. W., Dalton, G., Stevens, M., Korreck, K. E., Ho, G., Robinson, M., Tiu, C., Whittlesey, P. L., Verniero, J. L., Halekas, J., McFadden, J., Marckwordt, M., Slagle, A., … McManus, M. D. (2022). The Solar Probe ANalyzer—Ions on the Parker Solar Probe. Astrophysical Journal, 938(2).
RightsCopyright © 2022. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence.
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AbstractThe Solar Probe ANalyzer for Ions (SPAN-I) onboard NASA's Parker Solar Probe spacecraft is an electrostatic analyzer with time-of-flight capabilities that measures the ion composition and three-dimensional distribution function of the thermal corona and solar-wind plasma. SPAN-I measures the energy per charge of ions in the solar wind from 2 eV to 30 keV with a field of view of 247.°5 × 120° while simultaneously separating H+ from He++ to develop 3D velocity distribution functions of individual ion species. These observations, combined with reduced distribution functions measured by the Sun-pointed Solar Probe Cup, will help us further our understanding of the solar-wind acceleration and formation, the heating of the corona, and the acceleration of particles in the inner heliosphere. This paper describes the instrument hardware, including several innovative improvements over previous time-of-flight sensors, the data products generated by the experiment, and the ground calibrations of the sensor. © 2022. The Author(s). Published by the American Astronomical Society.
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Except where otherwise noted, this item's license is described as Copyright © 2022. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence.