He/H Ratio in Solar Energetic Particle Events

Georgia Adair de Nolfo1, J. Grant Mitchell1, Eric R Christian2, Christina Cohen3, Alan C Cummings4, Mihir Indrajit Desai5, Joe Giacalone6, Matthew E Hill7, Allan Wayne Labrador8, Richard A Leske9, David J McComas10, Ralph L McNutt Jr11, Richard Mewaldt9, Donald G Mitchell7, Jamie Sue Rankin12, Nathan Schwadron13, Tejaswita Sharma12, Mitchell Shen14, Jamey R Szalay10, Mark E Wiedenbeck15, Stuart D Bale16, Marc Pulupa17, Justin Kasper18, Davin E Larson19 and Phyllis L Whittlesey20, (1)NASA Goddard Space Flight Center, Greenbelt, MD, United States, (2)NASA GSFC, Greenbelt, MD, United States, (3)Caltech, Pasadena, United States, (4)CALTECH, Pasadena, CA, United States, (5)Southwest Research Institute, San Antonio, United States, (6)University of Arizona, Planetary Sciences, Tucson, AZ, United States, (7)Johns Hopkins University Applied Physics Laboratory, Laurel, MD, United States, (8)Mail Code 290-17, Pasadena, CA, United States, (9)Caltech, Pasadena, CA, United States, (10)Princeton University, Department of Astrophysical Sciences, Princeton, NJ, United States, (11)Johns Hopkins University Applied Physics Laboratory, Space Exploration Sector, Laurel, MD, United States, (12)Princeton University, Princeton, NJ, United States, (13)University of New Hampshire, Durham, United States, (14)Princeton University, Princeton, United States, (15)Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States, (16)University of California Berkeley, Space Sciences Laboratory, Berkeley, CA, United States, (17)Space Sciences Laboratory, University of California Berkeley, Berkeley, CA, United States, (18)University of Michigan, Ann Arbor, United States, (19)Space Sciences Laboratory, Berkeley, United States, (20)Space Sciences Laboratory, University of California Berkeley, Berkeley, United States