We study the modulation of galactic cosmic rays due to magnetic clouds observed during solar cycles 23 and 24 (1996-2018). We utilize solar wind plasma and field data together with cosmic ray intensity (CRI) data during the passage of magnetic clouds and associated structures. We apply superposed epoch analysis to analyze these data. We study the relative importance of magnetic clouds and their associated structures in modulating the cosmic rays. We observe significant differences in the amplitudes and time profiles of transient depressions in cosmic ray intensity due to magnetic regimes of different field strengths and topologies. We discuss the observed results in light of differences in the simultaneous plasma and magnetic field properties.

我们研究了由于在太阳周期 23 和 24（1996-2018）期间观察到的磁云对银河宇宙射线的调制。我们在磁云和相关结构通过期间利用太阳风等离子体和场数据以及宇宙射线强度 (CRI) 数据。我们应用叠加历元分析来分析这些数据。我们研究了磁云及其相关结构在调制宇宙射线方面的相对重要性。我们观察到，由于不同场强和拓扑结构的磁区，宇宙射线强度中瞬态凹陷的幅度和时间曲线存在显着差异。我们根据同时等离子体和磁场特性的差异来讨论观察到的结果。