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Session: Heliophysics and the Solar System

Name: Dr. Athanasios Kouloumvakos (The Johns Hopkins University, APL)
Coauthors: Mason G. M. (The Johns Hopkins University Applied Physics Laboratory)
Ho G. C. (The Johns Hopkins University Applied Physics Laboratory)
Allen R. C. (The Johns Hopkins University Applied Physics Laboratory)
Type: Oral
Title: Energetic Particle Measurements from the Suprathermal Ion Spectrograph (SIS) during the the First 3 Years of SolO mission
Abstract:

Through the first three years of the Solar Orbiter mission, the Suprathermal Ion Spectrograph (SIS), part of the Energetic Particle Detector (EPD) suite, has observed a plethora of solar energetic particles (SEP) events close to the Sun. SIS is a high-mass resolution sensor that performs precise measurements of heavy ion composition (from He to Fe) for an energy range from ∼100 keV/nucleon up to several MeV/nucleon. SIS has observed a wide variety of SEP events, each with unique properties, including impulsive 3He-rich SEP events with properties similar to those previously observed at 1 au but in the absence of phenomena such as jets and small coronal mass ejections, interplanetary ion dropout events, suprathermal particles from corotating interaction regions, and extended 3He-rich periods spanning multiple days. In my presentation, I will highlight selected results from SIS for the first three years of the SolO mission and discuss how these shape our understanding of the sources of 3He-rich events and the production of long time periods abundant with this rare isotope of He.