用AMS-01实验测量Cosmic Ray B/C比
Measurement of the Cosmic Ray B/C Ratio with the AMS-01 Experiment
摘要:
阿尔法磁谱仪(AMS)是一种粒子物理探测器,用于高精度测量空间中的宇宙射线。AMS第二阶段(AMS-02)计划从2010年9月起安装在国际空间站上至少三年。AMS-01前体实验在1998年6月为期10天的美国航天局航天飞机飞行期间成功运行。在320至380公里的测地高度上,轨道倾角为51.7°。AMS-01在1-40 GV的刚性范围内观察到近200,000个Z>2的核。利用这些数据,有可能研究初级宇宙射线的相对丰度和能谱,提供与其来源和传播过程的关系。本文给出了0.4-19 GeV/核子动能范围内B/C比的初步结果。
英文摘要:
The Alpha Magnetic Spectrometer (AMS) is a particle physics detector designed for a high precision measurement of cosmic rays in space. AMS phase-2 (AMS-02) is scheduled to be installed on the ISS for at least three years from September 2010. The AMS-01 precursor experiment operated successfully during a 10-day NASA shuttle flight in June 1998. The orbital inclination was 51.7° at a geodetic altitude between 320 to 380 km. Nearly 200,000 Z>2 nuclei were observed by AMS-01 in the rigidity range 1-40 GV. Using these data, it is possible to investigate the relative abundances and the energy spectra of the primary cosmic rays, providing relations with their sources and propagation processes. Preliminary results on the B/C ratio in 0.4-19 GeV/nucleon kinetic energy are presented.
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