【摘要】 利用小波变换,结合折叠周期分析方法,对羊八井宇宙线观测站TibetASγ阵列1998年4—6月的实验记录数据进行了周期分析,发现TeV和10TeV宇宙线流强观测数据中包含0.5和1d周期变化,其信噪比分别达到10和6.TeV宇宙线0.5和1d周期变化的最大变化幅度分别约为0.3%和0.5%,10TeV宇宙线约为0.4%和0.7%.更多还原

【Abstract】 We use the technique of wavelet analysis and epoch folding methods to search for the superimposed periodic signals of 1-10 TeV cosmic ray in the data obtained with Tibet Ⅱ/HD AS Array for April to June of 1998. Solar time semi-diurnal and diurnal variations have been detected with about signal-noise ratio 10 and 6 for the 1 TeV and 10 TeV cosmic ray flux respectively. The semi-diurnal variations are of an amplitude 0.3%, a phase 0.9 for 1 TeV cosmic ray and 0.4%, 0.9 for 10 TeV. The diurnal variations are of amplitude 0.5%, 0.7%, and phase 0.8 for 1 TeV and 10 TeV cosmic ray respectively.更多还原