Title:

Search for the Common Power Law Spectrum in Parker Solar Probe's ISOIS-EPILo Data

Helios, the Advanced Composition Explorer, and the Ulysses spacecraft revealed the presence of a common power-law spectrum in the solar wind, the shape of which is independent of solar activity. The highest energy particles in this distribution are a direct interest to human affairs as they can serve as the seed population for large, destructive events that can harm ground- and air-based equipment. Parker Solar Probe provides a new platform to probe this relationship. I investigate the first year and a half of Parker Solar Probe's data across fourteen distinct solar wind events to find evidence of this relationship within 0.3 AU. Event parameters such as anisotropy, flux, and duration, among others are considered to classify event type and inform the physical and temporal regions to be studied. I find weak evidence to suggest the existence of a common power-law coefficient in the spectrum of solar wind from ~60 keV to 200 keV. Further work is required to eliminate noise from Parker Solar Probe's data to elucidate the phenomena in this region and confirm the existence of a common power-law spectrum.

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