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论文中英文摘 要
作者姓名:张
论文题目:γ实验研究Multi-TeV宇宙线各向异性
作者简介:张毅,男,1980年10月出生,2003年9月师从于中国科学院高能物理研究所胡红波研究员,于2017年7月获博士学位.
中 文 摘 要
γ和ARGO实验都是通过观测宇宙线广延大气簇射产生的次级粒子来获得宇宙线的方向和能量的,这类实验能够宽视野(赤纬-14.89o~75.11o)全天候的观测.其中ASγ阵列在1997年2月到2005年10月长时间稳定的运行,提供了研究宇宙线各向异性现象的最好数据样本.传统谐波分析的方法,只能得到一维各向异性低阶谐波项的振幅和相位.利用等天顶角原理,我们发展了一套分析各向异性的方法,这套方法能够得到高精度的两维各向异性天图.
在太阳时的窗口中,通过对12.5TeV能量段样本的分析,观测到了与预期相符因地球公转产生的Compton-Getting效应.在低能段观测到一个额外的调制,但需要进一步的研究.在恒星时的窗口中,除了更精细地观测到已知的"tail-in"和"loss-cone"结构,还发现在Cygnus区域也有宇宙线流强的超出.在分析恒星时各向异性的能量依赖时,发现随着能量的提高,"tail-in","loss-cone"效应的影响逐渐淡化,但在300TeV能区没有发现因为太阳绕银河系中心旋转产生的Compton-Getting效应,意味着银河系宇宙线绕银河系中心共转.这些结果暗示着这个能区的宇宙线粒子受到太阳系附近环境的银河系磁场束缚.
关键词: Study the Anisotropy of Multi-TeV
Co论文范文ic Rays with Yangbajing ASγ Experiment
Zhang Yi
ABSTRACT
The intensity of Galactic co论文范文ic rays is nearly isotropic because of the influence of magic fields in the Milky Way. Given the fact that the maximum amplitude of the anisotropy in TeV energy range is only about 0.001, a long term stable observation and high precision analysis are inevitable for the studies of such a subtle anisotropy. Both ASγ and ARGO experiments in Yangbajing observatory obtain the directional and energy information of the co论文范文ic ray by measurements of the secondary particles generated in the air shower. With th
各向异性过滤:高中物理实验084-晶体的各向异性与非晶体的各向同性
e excellent operation of the AS-gamma array from 1997.2 to 2005.10, a large data sample was obtained, which is especially suitable for the analysis of large scale co论文范文ic ray anisotropy, owing to its large field of view and high stability in performance. The traditional anisotropy analysis is limited to measure the first few terms of the harmonical expansion and is carried only in one dimensional space. Based on the equi-zenith angle method, this work has developed a new analysis method which allows the two-dimensional and high precision anisotropy measurement possible for the first time.In the solar time frame, the two-dimensional anisotropy is observed at 12.5TeV energy range, and consistent with the expected Compton-Getting effect due to the terrestrial orbital motion around the Sun. An additional modulation appears to exist in case of low energy but further studies is needed. In the sidereal time frame, besides revealing finer details of the known anisotropies of "tail-in" and "loss-cone", a new ponent is uncovered around the Cygnus region direction. For co论文范文ic-ray energies up to a few hundred TeV, all ponents of anisotropies fade away, the Compton-Getting effect due to the solar motion around the Galactic center is not observed which indicates that the Galactic co论文范文ic rays co-rotate around the Galactic center with the solar environment. These results h论文范文e an implication that co论文范文ic rays in TeV energy range are strongly trapped by the Galactic magic field in the local environment.
Key words: Co论文范文ic ray, anisotropy, corotation
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