Coronal mass ejections (CMEs) and solar energetic particles (SEPs) are two phenomena that can cause severe space weather effects throughout the heliosphere. The evolution of CMEs, especially in terms of their magnetic structure, and the configuration of the interplanetary magnetic field (IMF) that influences the transport of SEPs are currently areas of active research. These two aspects are not necessarily independent of each other, especially during solar maximum when multiple eruptive events can occur close in time. Accordingly, we present the analysis of a CME that erupted on May 11, 2012 (SOL2012‐05‐11) and an SEP event following an eruption that took place on May 17, 2012 (SOL2012‐05‐17). After observing the May 11 CME using remote‐sensing data from three viewpoints, we evaluate its propagation through interplanetary space using several models. Then, we analyze in‐situ measurements from five predicted impact locations (Venus, Earth, the Spitzer Space Telescope, the Mars Science Laboratory en route to Mars, and Mars) in order to search for CME signatures. We find that all in‐situ locations detect signatures of an SEP event, which we trace back to the May 17 eruption. These findings suggest that the May 11 CME provided a direct magnetic connectivity for the efficient transport of SEPs. We discuss the space weather implications of CME evolution, regarding in particular its magnetic structure, and CME‐driven IMF preconditioning that facilitates SEP transport. Finally, this work remarks the importance of using data from multiple spacecraft, even those that do not include space weather research as their primary objective.

中文翻译：

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CME磁性结构和IMF预处理影响SEP传输

日冕物质抛射（CMEs）和太阳高能粒子（SEPs）是两种现象，可在整个太阳圈中引起严重的太空天气影响。CME的发展，特别是在其磁结构方面，以及影响SEP传输的行星际磁场（IMF）的配置，目前是活跃的研究领域。这两个方面不一定彼此独立，特别是在太阳爆发高峰期，当多个喷发事件可能会及时发生时。因此，我们提供了对2012年5月11日爆发的CME的分析（SOL2012‐05‐11）和2012年5月17日爆发的SEP事件（SOL2012‐05‐17）。从三个角度使用遥感数据观察了5月11日的CME之后，我们使用几种模型评估其在行星际空间中的传播。然后，我们分析了五个预测的撞击位置（金星，地球，斯必泽太空望远镜，前往火星的火星科学实验室和火星）的现场测量结果，以寻找CME签名。我们发现所有原位都检测到SEP事件的签名，我们可以追溯到5月17日的喷发。这些发现表明，5月11日的CME为SEP的有效运输提供了直接的磁连通性。我们将讨论CME演化对空间天气的影响，尤其是其磁结构，以及CME驱动的IMF预处理（有助于SEP运输）。最后，这项工作说明了使用来自多个航天器的数据的重要性，