Azimuthal modulation of the event rate of cosmic-ray extensive air showers by the geomagnetic field
Azimuthal modulation of the event rate of cosmic-ray extensive air showers by the geomagnetic field
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DOI：
10.1134/1.568025
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发表时间：
1999-03
期刊：
影响因子：
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通讯作者：
A. Ivanov;V. P. Egorova;V. Kolosov;A. D. Krasil’nikov;M. Pravdin;I. Sleptsov
中科院分区：
文献类型：
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作者：
A. Ivanov;V. P. Egorova;V. Kolosov;A. D. Krasil’nikov;M. Pravdin;I. Sleptsov
利用雅库茨克台阵多年观测所得的数据，测量了地球磁场对大范围空气簇射数方位分布的影响。在10− 14的显著性水平下，这些簇射的事件率的均匀方位角分布被拒绝。谐波的振幅取决于天顶角A1 <$0.2 sin 2 θ，实际上与初级粒子能量无关，而相位与磁子午线一致。从测量的效果的大小的粒子密度的校正因子被确定取决于地磁参数的簇射。
The effect of the Earth’s magnetic field on the azimuthal distribution of the number of extensive air showers is measured using data obtained from many years of observations at the Yakutsk array. A uniform azimuthal distribution of the event rates of these showers is rejected at a 10−14significance level. The amplitude of the harmonic of the distribution depends on the zenith angle asA1≈0.2 sin2θ and is virtually independent of the primary-particle energy, while the phase coincides with the magnetic meridian. From the magnitude of the measured effect a correction factor for the particle density is determined which depends on the geomagnetic parameter of the shower.