July 29, 2015 to August 6, 2015
World Forum
Europe/Amsterdam timezone

Abundances of Ultra-Heavy Galactic Cosmic Rays from the SuperTIGER Instrument

Aug 1, 2015, 2:30 PM
15m
Mississippi (World Forum)

Mississippi

World Forum

Churchillplein 10 2517 JW Den Haag The Netherlands
Oral contribution CR-EX Parallel CR10 Dir heavy

Speaker

Mr Ryan Murphy (Washington University in St. Louis, St. Louis, MO 63130, USA)

Description

The SuperTIGER (Trans-Iron Galactic Element Recorder) experiment was launched on a long-duration balloon flight from Williams Field, Antarctica, on December 8, 2012. SuperTIGER flew for a total of 55 days at a mean atmospheric depth of 4.4 g/cm^2. The instrument measured the abundances of galactic cosmic rays in the charge (Z) range Z ≥ 10 with excellent charge resolution, displaying well resolved individual element peaks for 10 ≤ Z ≤40. SuperTIGER collected ~3.95 x 10^6 Iron nuclei, ~7.1 times as many as detected by TIGER. We will present details of the data analysis techniques and the elemental abundances in the range 30 ≤ Z ≤40. The data presented contain more than 600 events in this charge range, with charge resolution at iron of < 0.18 cu. Our measured abundances are generally consistent with those measured by TIGER and ACE. Our results confirm the earlier results from TIGER, supporting a model of cosmic-ray origin in OB associations, with preferential acceleration of refractory elements over volatile elements.
Collaboration -- not specified --
Registration number following "ICRC2015-I/" 983

Primary author

Mr Ryan Murphy (Washington University in St. Louis, St. Louis, MO 63130, USA)

Co-authors

Dr A. W. Labrador (California Institute of Technology, Pasadena, CA 91125, USA) Dr B. F. Rauch (Washington University in St. Louis, St. Louis, MO 63130, USA) Dr C. J. Waddington (University of Minnesota, Minneapolis, MN 55455, USA) Dr E. C. Stone (California Institute of Technology, Pasadena, CA 91125, USA) Dr J. E. Ward (Washington University in St. Louis, St. Louis, MO 63130, USA) Dr J. T. Link (NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USA) Dr J. W. Mitchell (NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USA) Dr K. Sakai (NASA/GSFC/CRESST/UMBC) Dr M. E. Wiedenbeck (Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA) Dr M. H. Israel (Washington University in St. Louis, St. Louis, MO 63130, USA) Dr M. Sasaki (NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USA) Mr P. F. Dowkontt (Washington University in St. Louis, St. Louis, MO 63130, USA) Dr R. A. Mewaldt (California Institute of Technology, Pasadena, CA 91125, USA) Mr R. G. Bose (Washington University in St. Louis, St. Louis, MO 63130, USA) Dr T. Hams (NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USA) Dr T. J. Brandt (NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USA) Dr W. R. Binns (Washington University in St. Louis, St. Louis, MO 63130, USA)

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