Bulletin of the American Physical Society
APS April Meeting 2016
Volume 61, Number 6
Saturday–Tuesday, April 16–19, 2016; Salt Lake City, Utah
Session J13: Cosmic-Ray Science Interest GroupFocus
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Sponsoring Units: DAP Chair: Eun-Suk Seo, University of Maryland Room: 250F |
Sunday, April 17, 2016 10:45AM - 11:21AM |
J13.00001: Current Status of Astrophysics of Cosmic Rays Invited Speaker: Igor Moskalenko I will review the current instrumentation and recent results. I will discuss which measurements have to be done in the near future to significantly advance our knowledge about the phenomenon of cosmic rays, their sources, and their interactions with the interstellar medium. [Preview Abstract] |
Sunday, April 17, 2016 11:21AM - 11:33AM |
J13.00002: The CALorimetric Electron Telescope (CALET) Launch and Early On-Orbit Performance T Gregory Guzik The CALET space experiment, has been developed by collaborators in Japan, Italy and the United States, will study electrons to 20 TeV, gamma rays above 10 GeV and nuclei with Z$=$1 to 40 up to 1,000 TeV during a five-year mission on the International Space Station. The instrument consists of a particle charge identification module, a thin imaging calorimeter (3 r.l. in total) with tungsten plates interleaving scintillating fiber planes, and a thick calorimeter (27 r.l.) composed of lead tungstate logs. CALET has the depth, imaging capabilities and energy resolution for excellent separation between hadrons, electrons and gamma rays. The instrument was launched into orbit on August 19, 2015 and on August 25, 2015 was mounted as an attached payload on the International Space Station (ISS) Japanese Experiment Module -- Exposed Facility (JEM-EF). The experiment has successfully completed on-orbit checkout and has now been transitioned to normal science operations. This presentation summarizes the instrument design, science goals and early on-orbit performance. [Preview Abstract] |
Sunday, April 17, 2016 11:33AM - 11:45AM |
J13.00003: Status and Plan of the ISS-CREAM Experiment Nicolas Picot-Clemente The Cosmic Ray Energetics and Mass (CREAM) project began as a balloon-borne experiment, which was flown successfully for 161 days in six flights over Antarctica. It was subsequently reconfigured for implementation on the International Space Station (ISS) to provide an order of magnitude increase in the exposure time with no atmospheric overburden. The ISS-CREAM instrument is configured of four subsystems: four layers of silicon charge detector (SCD) for charge measurements, top and bottom counting detectors (TCD/BCD) for electron/proton separation, a calorimeter (CAL) for energy measurements, and a boronated scintillator detector (BSD) for additional electron/proton distinction. CREAM is designed to investigate cosmic-ray origin, acceleration, and propagation by directly measuring individual particles with energy between $10^{12}$-$10^{15}$eV and determining cosmic ray composition from protons to iron. The hardware was successfully tested, and remote monitoring and control capabilities were verified. It is scheduled for launch in 2016. The status and plan of the ISS-CREAM experiment will be presented. [Preview Abstract] |
Sunday, April 17, 2016 11:45AM - 11:57AM |
J13.00004: Cosmic Rays in the Gamma-ray Sky T. J. Brandt Instruments directly measuring properties of cosmic rays (CRs) have given us insight into their origins, acceleration mechanisms, and propagation. Indirect measurements provide complementary information which can help disentangle particle types and energetics at sources such as supernova remnants (SNRs), can suggest new sources, and can trace the propagation of CRs through, for instance, interactions with a galaxy's interstellar medium. Gamma rays are particularly good at indirectly illuminating CRs as they are sensitive to the pion decay channel (CR+$p^+\rightarrow\pi^0\rightarrow\gamma+\gamma$). Recent work, e.g., using the pion turn-on energy to show proton acceleration in 3 SNRs and mapping CR interactions with Galactic gas using Fermi-LAT, bears this out. The survey capability of instruments like Fermi and HAWC nicely complements the isotropized CRs measured near Earth while VERITAS, MAGIC, and HESS Imaging Air Cherenkov Telescopes (IACTs) provide greater insight into potential sources, including constraining maximum energy both within and beyond our Galaxy. Upcoming IACTs like CTA will greatly enhance this. This talk will explore recent results and potential future insights into CRs using gamma-ray emission and touch on direct measurements made with gamma-ray instruments. [Preview Abstract] |
Sunday, April 17, 2016 11:57AM - 12:09PM |
J13.00005: The Heavy Nuclei eXplorer (HNX) Mission John Krizmanic, John Mitchell, W. Robert Binns, Thomas Hams, Martin Israel, Jason Link, Brian Rauch, Kenichi Sakai, Makoto Sasaki, Andrew Westphal, Mark Wiedenbeck The Heavy Nuclei eXplorer (HNX) will use two large high-precision instruments, the Extremely-heavy Cosmic-ray Composition Observer (ECCO) and the Cosmic-ray Trans-Iron Galactic Element Recorder (CosmicTIGER), designed to fly in a SpaceX DragonLab Capsule, to measure the cosmic-ray abundance of every individual element in the periodic table from carbon through curium, providing the first measurement of many of these elements. These measurements provide an investigation on the nature of the source material of cosmic rays, the processes that inject them into cosmic accelerators, and the acceleration mechanisms. HNX will measure several thousand ultra-heavy galactic cosmic ray (UHGCR) nuclei with $Z \ge 30$, including about 50 actinides ($Z \ge 79$). These data allow for a measurement of the mix of new and old material that is accelerated to GCRs, determine their age, measure the mix of nucleosynthesis processes responsible for the UHGCRs, determine how UHGCR elements are selected for acceleration, and measure the mean integrated pathlength traversed by UHGCRs before observation. The scientific motivation and instrumentation of HNX will be discussed as well as recent beam test results. [Preview Abstract] |
Sunday, April 17, 2016 12:09PM - 12:21PM |
J13.00006: Update on JEM-EUSO James Adams, Lawrence Wiencke, Angela Olinto The Extreme Universe Space Observatory on the Japanese Experiment Module (JEM-EUSO) experiment is being developed for a space mission. The science objective is to locate the nearest sources of extreme energy cosmic rays by measuring the arrival directions of cosmic rays with energies \textgreater 100 EeV by observing extensive air showers from space. [Preview Abstract] |
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