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- SH31D-2495: Why do spacecraft charging model predictions strongly disagree with measured floating potentials on Parker Solar Probe?
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Board 2495‚ Hall EFG (Poster Hall)NOLA CC
Author(s):Generic 'disconnected' Message
Delaney Lee-bellows, Laboratory for Atmospheric and Space Physics (First Author, Presenting Author)
David Malaspina, University of Colorado
Jan Deca, University of Colorado Boulder
Millan Diaz-Aguado, University of California Berkeley
Robert Ergun, Univ Colorado
Mingzhe Liu, LESIA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Université de Paris
John Bonnell, University of California, Berkeley
Spacecraft surface charging occurs when spacecraft are immersed in a plasma and encounter charged particles such as ions and electrons. These particles can build up on the surface of spacecraft and generate electric fields, which can affect instruments onboard. NASA’s Parker Solar Probe (PSP) spacecraft flies extremely close to the Sun, closer than any spacecraft before. Consequently, it experiences plasma conditions never experienced before by spacecraft, including an enormous flux of ultraviolet solar photons, which can contribute to the charging of the spacecraft. These conditions cause unanticipated spacecraft surface charging across all encounters with the Sun. This trend is best explained by variations in solar photon flux across wavelengths over the solar cycle. Understanding the spacecraft surface charging of PSP gives us an opportunity to explore spacecraft surface charging in an entirely new environment.
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