Resolving electrons from protons in ATIC |
| |
| Authors: | J Chang JH Adams Jr HS Ahn GL Bashindzhagyan KE Batkov M Christl AR Fazely O Ganel RM Gunashingha TG Guzik J Isbert KC Kim EN Kouznetsov ZW Lin MI Panasyuk AD Panov WKH Schmidt ES Seo NV Sokolskaya John W Watts JP Wefel J Wu VI Zatsepin |
| |
| Institution: | 1. Purple Mountain Observatory, Space Astronomy Division, Chinese Academy of Sciences, Beijing West Road 2, Nanjing, Jiangsu 210008, China;2. Max-Planck Institute for Solar System Research, Katlenburg-Lindau, Germany;3. Marshall Space Flight Center, Huntsville, AL, USA;4. University of Maryland, Institute for Physical Science & Technology, College Park, MD, USA;5. Skobeltsyn Institute of Nuclear Physics, Moscow State University, Moscow, Russia;6. Southern University, Department of Physics, Baton Rouge, LA, USA;g Louisiana State University, Department of Physics and Astronomy, Baton Rouge, LA, USA;h University of Alabama, Huntsville, AL, USA |
| |
| Abstract: | The Advanced Thin Ionization Calorimeter (ATIC) experiment is designed for high energy cosmic ray ion detection. The possibility to identify high energy primary cosmic ray electrons in the presence of the ‘background’ of cosmic ray protons has been studied by simulating nuclear-electromagnetic cascade showers using the FLUKA Monte Carlo simulation code. The ATIC design, consisting of a graphite target and an energy detection device, a totally active calorimeter built up of 2.5 cm × 2.5 cm × 25.0 cm BGO scintillator bars, gives sufficient information to distinguish electrons from protons. While identifying about 80% of electrons as such, only about 2 in 10,000 protons (@ 150 GeV) will mimic electrons. In September of 1999 ATIC was exposed to high-energy electron and proton beams at the CERN H2 beam line, and this data confirmed the electron detection capabilities of ATIC. From 2000-12-28 to 2001-01-13 ATIC was flown as a long duration balloon test flight from McMurdo, Antarctica, recording over 360 h of data and allowing electron separation to be confirmed in the flight data. In addition, ATIC electron detection capabilities can be checked by atmospheric gamma-ray observations. |
| |
| Keywords: | Electron Simulation Beam test Balloon flight |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
