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Advanced Thin Ionization Calorimeter : ウィキペディア英語版 | Advanced Thin Ionization Calorimeter
The Advanced Thin Ionization Calorimeter (ATIC) is a balloon-borne instrument flying in the stratosphere over Antarctica to measure the energy and composition of cosmic rays. ATIC was launched from McMurdo Station for the first time in December 2000 and has since completed three successful flights out of four. ==Working principle== The detector uses the principle of ionization calorimetry: several layers of the scintillator bismuth germanate emit light as they are struck by particles, allowing to calculate the particles' energy. A silicon matrix is used to determine the particles' electrical charge.〔(Instrument description ), LSU Space Science group. Retrieved 23 November 2008〕
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