Studies of the energy spectrum and composition of the primary cosmic rays at 100?1000 TeV from the GRAPES-3 experiment
Studies of the energy spectrum and composition of the primary cosmic rays at 100?1000 TeV from the GRAPES-3 experiment
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GRAPES-3 实验中 100?1000 TeV 初级宇宙线的能谱和成分研究
DOI：
10.1088/0954-3899/39/2/025201
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
A. Oshima
中科院分区：
文献类型：
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作者：
H. Tanaka;S. Dugad;S. Gupta;A. Jain;P. Mohanty;B. Rao;K. C. Ravindran;K. Sivaprasad;S. Tonwar;Y. Hayashi;N. Ito;S. Kawakami;M. Minamino;T. Nonaka;A. Oshima
初级宇宙线的组成和能谱是研究加速初级宇宙线到�1000TeV的源的性质的唯一高能观测数据。这些观测数据已经用气球和卫星上的探测器直接测量到了∼300TeV。但是，1000TeV的测量值必须间接从地面对大范围空气骤雨的观测中获得。然而，他们的解释依赖于对�1000TeV强子相互作用的不充分了解。GRAPES-3实验设计为在�30TeV下运行，提供与直接测量的相当大的能量重叠，从而能够在∼1000TeV下选择合适的强子相互作用模型。我们给出了GRAPES-3的显著特征，包括用560m2探测器观测到的随簇射大小变化的Muon多重数分布的细节，这是对545天的数据的分析。利用CORSIKA中的一些强子相互作用发生器，将这些分布与蒙特卡罗模拟的预期进行了比较，以推导出100-1000TeV区域内五个核团的能谱。GRAPES-3的结果与直接测量结果的比较表明，Sibyll为解释我们的数据提供了一个很好的强子相互作用描述。这些测量与直接测量的外推相一致，扩展了完成项目报告的能谱和组成。(有些数字可能只在网络期刊上以彩色出现)
The composition and energy spectrum of primary cosmic rays (PCRs) are the only observables at high energies to study the nature of sources accelerating PCRs to �1000 TeV. These observables have been directly measured up to ∼300 TeV with detectors aboard balloons and satellites. But measurements at >1000 TeV have to be obtained indirectly from ground-based observations of extensive air showers. However, their interpretation relies on an inadequate knowledge of hadronic interactions at �1000 TeV. The GRAPES-3 experiment is designed to operate at �30 TeV providing a sizable overlap in energy with direct measurements, enabling the selection of a suitable model of hadronic interactions at ∼1000 TeV. We present salient features of GRAPES-3 including details of muon multiplicity distributions observed with a 560 m 2 detector as a function of shower size from an analysis of data of 545 days. These distributions were compared with expectations from Monte Carlo simulations, using some of the hadronic interaction generators in CORSIKA, to deduce energy spectra of five nuclear groups in the 100–1000 TeV region. A comparison of GRAPES-3 results with direct measurements indicates that SIBYLL provides a good description of hadronic interactions for interpreting our data. These measurements extend energy spectra and composition of PCRs that is consistent with extrapolation of direct measurements. (Some figures may appear in colour only in the online journal)
影响因子：
5
作者：
M. Amenomori;S. Ayabe;Caidong;E. al.
通讯作者：
M. Amenomori;S. Ayabe;Caidong;E. al.
GRAPES-3 阵列在月球和太阳阴影下的角分辨率
DOI：
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发表时间：
2010
期刊：
Astroperticle Physics 33
影响因子：
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作者：
A.Oshima;et al.
通讯作者：
et al.