12-20 July 2017
Asia/Seoul timezone
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BEXCO - Room A(101/102)

[CRD148] The Cosmic Ray Energetics And Mass Project


  • Eun-Suk SEO

Primary authors


Building on the success of balloon flights, a Cosmic Ray Energetics And Mass (CREAM) payload was transformed for exposure on the International Space Station (ISS) Japanese Experiment Module Exposed Facility (JEM-EF). This ISS-CREAM instrument is configured with redundant and complementary particle detectors capable of precise measurements of elemental spectra for Z = 1 - 26 nuclei, as well as electrons. The four layers of its finely segmented Silicon Charge Detector provide precise charge measurements, and its ionization calorimeter provides energy measurements. In addition, scintillator-based Top and Bottom Counting Detectors and Boronated Scintillator Detector distinguish electrons from nuclei. At least an order of magnitude increase in data collecting power is expected by utilizing the ISS to reach the highest energies practical with direct measurements. Following completion of its pre-flight system-level qualification and verification tests at NASA Goddard Space Flight Center, the ISS-CREAM payload was delivered to the NASA Kennedy Space Center to await its launch to the ISS. While waiting for the ISS-CREAM launch, the other balloon payload including a Transition Radiation Detector, which is too large for the JEM-EF envelope, was prepared for another Antarctic balloon flight in 2016. This so-called Boron And Carbon Cosmic rays in the Upper Stratosphere (BACCUS) experiment was launched on November 28, 2016 and landed only 55 nautical miles from the launch site on December 28, 2016 after a 30 day flight. The overall project status, including results from on-going data analysis and future plans will be presented.