The elemental composition of high-energy cosmic rays: Measurements with tracer

被引：1
|
作者：
Boyle, P. J. [1 ]
机构：
[1] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA
来源：
MODERN PHYSICS LETTERS A | 2008年 / 23卷 / 25期
关键词：
cosmic rays; diffusive shock acceleration; energy spectrum; composition; transition radiation detector;
D O I：
10.1142/S0217732308028260
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
TRACER ("Transition Radiation Array for Cosmic Energetic Radiation") is a balloon borne instrument that has been developed to directly measure the composition and energy spectra of individual heavy elements up to 10(15) eV particle(-1). TRACER achieves a large geometric factor (5 m(2) sr) through the use of a Transition Radiation Detector utilizing arrays of single wire proportional tubes. TRACER has measured the energy spectra of the elements O, Ne, Mg, Si, S, Ar, Ca and Fe. The energy spectra reach energies in excess of 10(14) eV particle(-1) and exhibit nearly the same spectral index (2.65 +/- 0.05) for all elements.
引用
收藏
页码：2031 / 2045
页数：15
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