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A comparative analysis on two solar proton events

机译：两次太阳质子事件的比较分析

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This paper presents a comparative analysis on the two Solar Proton Events (SPE), which occurred on 14 July 2000 (Bastille Day) and 28 October 2003 (280CT03) respectively. It is found that although the peak flux of the latter seemed to be greater than that of the former based on geostationary observations, the maximum intensities of the energetic protons (>10 MeV and 30 MeV) during the Bastille Day event were all higher than those of the 28OCT03 event according to the interplanetary observations. Further analysis indicated that the quantity of the seed particles, which could be accelerated to the energies exceeding 10 and 30 MeV by the Coronal Mass Ejection (CME)-driven shock on 14 July 2000, was far larger than that of the 28OCT03 event. In the Bastille Day case, when the CME approached to the height around 14 solar radius, the CME-driven shock would reach its maximum capacity in accelerating the solar energetic protons (>100 MeV). In contrast, on 28 October 2003, when CME approached to the height about 58 solar radius, the CME-driven shock reached its highest potential in accelerating the solar energetic protons of the same category. At this moment, the peak flux (>100 MeV) was about 155 pfu, which was much lower than 355 pfu measured on 14 July 2000. This demonstrated that in the Bastille Day event, the quantity of the seed particles, which could be accelerated to the energy beyond 100 MeV, was significantly larger than its counterpart in the 28OCT03 case. Therefore, the peak flux of an SPE event depends not only on the interplanetary intensity of the solar energetic particles, but also on the velocity of the associated CME-driven shock, and the quantity of the seed particles as well as on the interplanetary magnetic environment. This paper also reveals that the magnetic sheath associated with ICME on 28 October 2003 captured a large number of solar energetic protons, including those having energy greater than 100 MeV.
机译：本文对两个分别发生在2000年7月14日（巴士底日）和2003年10月28日（280CT03）的太阳质子事件（SPE）进行了比较分析。根据对地静止观测发现，尽管后者的峰值通量似乎大于前者的峰值通量，但在巴士底日活动期间，高能质子的最大强度（> 10 MeV和30 MeV）都高于那些。根据星际观测发现28OCT03事件的发生。进一步的分析表明，2000年7月14日通过日冕质量抛射（CME）驱动的冲击，可将其加速至能量超过10和30 MeV的种子颗粒数量远大于28OCT03事件的数量。在巴士底日的情况下，当CME到达太阳半径14附近的高度时，CME驱动的冲击将达到最大能力，以加速太阳高能质子（> 100 MeV）。相比之下，2003年10月28日，当CME到达太阳半径约58的高度时，CME驱动的激波达到了最大的潜力，可以加速相同类别的太阳能高能质子。此时，峰值通量（> 100 MeV）约为155 pfu，远低于2000年7月14日测得的355 pfu。这表明在巴士底日活动中，可以加速种子颗粒的数量超过100 MeV的能量，明显大于28OCT03情况下的能量。因此，SPE事件的峰值通量不仅取决于太阳高能粒子的行星际强度，而且取决于相关的CME驱动的冲击的速度，种子粒子的数量以及行星际磁环境。 。本文还揭示了2003年10月28日与ICME相关的磁鞘捕获了大量的太阳能高能质子，包括能量大于100 MeV的质子。

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