Enhancing the ATIC charge resolution |
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| Authors: | TG Guzik JH Adams Jr HS Ahn GL Bashindzhagyan KE Batkov J Chang M Christl AR Fazely O Ganel RM Gunashingha J Isbert KC Kim EN Kouznetsov MI Panasyuk AD Panov WKH Schmidt ES Seo NV Sokolskaya JW Watts JP Wefel J Wu VI Zatsepin |
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| Institution: | 1. NASA Marshall Space Flight Center, Huntsville, AL 35812, USA;2. University of Maryland, Institute for Physical Science & Technology, College Park, MD 20742, USA;3. Skobeltsyn Institute of Nuclear Physics, Moscow State University, Moscow 119899, Russia;4. Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, China;5. Max-Planck Institute for Solar System Research, Katlenburg-Lindau 37191, Germany;6. Southern University, Department of Physics, Baton Rouge, LA 70813, USA;g Louisiana State University, Department of Physics and Astronomy, Baton Rouge, LA 70803, USA |
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| Abstract: | The Advanced Thin Ionization Calorimeter (ATIC) experiment is designed to investigate the charge composition and energy spectra of primary cosmic rays over the energy range from about 1011 to 1014 eV during Long Duration Balloon (LDB) flights from McMurdo, Antarctica. Currently, analysis from the ATIC-1 test flight and ATIC-2 science flight is underway and preparation for a second science flight is in progress. Charge identification of the incident cosmic ray is accomplished, primarily, by a pixilated Silicon Matrix detector located at the very top of the instrument. While it has been shown that the Silicon Matrix detector provides good charge identification even in the presence of electromagnetic shower backscatter from the calorimeter, the detector only measures the charge once. In this paper, we examine use of the top scintillator hodoscope detector to provide a second measure of the cosmic ray charge and, thus, improve the ATIC charge identification. |
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| Keywords: | Ballooning ATIC Particle detectors Hodoscope Charge resolution |
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