Updated Results of the CALET Ultra-Heavy Cosmic-Ray Analysis
ORAL
Abstract
The Calorimetric Electron Telescope (CALET), launched to the International Space Station in August 2015 and in continuous operation since, measures cosmic-ray (CR) electrons, nuclei, and gamma rays. CALET, with its 27 radiation length deep Total Absorption Calorimeter (TASC), measures particle energy, allowing for the determination of spectra and secondary to primary ratios of the more abundant CR nuclei through 28Ni, while the main charge detector (CHD) can measure Ultra-Heavy (UH) CR nuclei through 40Zn. By using the special high duty cycle (~90%) UH trigger in conjunction with a screen that requires UH trigger events to pass into the TASC, we leverage energy information into our charge assignment routine. After 8 years of operation, we show the relative abundances (to 26Fe) for 13 ≤ Z ≤ 44 and how these results compare to previous CALET UHCR analysis and published values from ACE-CRIS, SuperTIGER, and HEAO-3.
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Presenters
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Wolfgang V Zober
Washington University, St. Louis
Authors
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Wolfgang V Zober
Washington University, St. Louis
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Brian F Rauch
Washington University in St. Louis