Flux and Spectra of Primary Cosmic Rays at Yangbajing With the AMS-01 Experiment
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摘要: 利用Alpha Magnetic Spectrometer(AMS)实验对近地空间不同地磁纬度处不同能量原初宇宙线微分能谱的观测,通过积分近似计算和拟合方法,研究得出西藏羊八井地磁纬度处原初宇宙线质子动能在0.44～4.31GeV,4.31～12.38GeV,12.38～199.06GeV区间内的积分流强与拟合能谱函数以及原初宇宙线氦核在刚度区间6.92～14.45GV,14.45～229.9GV的积分流强与拟合能谱函数,为近一步进行羊八井处本底宇宙线流强估算奠定了基础.Abstract: Based on AMS-01 experiment, the integral fluxes and the energy spectra are investigated for the estimation of background cosmic ray radiation. Using the data from AMS-01 experiment in the Sun quiet phase of June 1998, the integral fluxes of primary protons for the kinetic energy ranges of 0.44～4.31GeV, 4.31～12.38GeV, 12.38～199.06GeV near the Earth at geomagnetic latitude of Yangbajing are achieved respectively. And the integral fluxes of primary for the kinetic energy ranges of 6.92～14.45GV and 14.45～229.9GV are also obtained. Correspondingly, the energy spectra functions for the protons and helium are then fitted for this 5 energy ranges, separately. The integral fluxes for the same energy range above is consistent by the two methods of approximate calculation of integral and the integral of function curves.
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Key words:
- AMS-01 experiment /
- Primary cosmic ray /
- Flux /
- Energy spectra
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