Abundances of Ultra-Heavy Galactic Cosmic Rays from the SuperTIGER Instrument
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 c...
Main Authors: | , , , , , , , , , , , , , , , , , |
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Format: | Book Part |
Language: | English |
Published: |
SISSA
2015
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Subjects: | |
Online Access: | https://authors.library.caltech.edu/89244/ https://authors.library.caltech.edu/89244/1/ICRC2015_438.pdf https://resolver.caltech.edu/CaltechAUTHORS:20180828-122926089 |
Summary: | 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 × 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 _(26)Fe 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. |
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