On 2019 May 6 the Lunar Lander Neutron & Dosimetry (LND) Experiment on board the Chang’E-4 lander on the far-side of the Moon detected its first solar energetic particle (SEP) event with proton energies up to 21 MeV. Combined proton energy spectra are studied based on the LND, SOHO/EPHIN, and ACE/EPAM measurements, which show that LND could provide a complementary data set from a special location on the Moon, contributing to our existing observations and understanding of space environment. We applied velocity dispersion analysis to the impulsive electron event and weak proton enhancement and show that electrons are released only 22 minutes after the flare onset and ∼15 minutes after the type II radio burst, while protons are released more than one hour after the electron release. The beam-like in situ electrons and clear velocity dispersion indicate a good magnetic connection between the source and Earth. This is remarkable because stereoscopic remote-sensing observations fr...

中文翻译：

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在月球远端测量到的第一个太阳高能粒子

2019年5月6日，在月球另一侧的Chang'E-4着陆器上进行的月球着陆器中子学和剂量学（LND）实验检测到了它的首个质子能量高达21 MeV的太阳高能粒子（SEP）事件。基于LND，SOHO / EPHIN和ACE / EPAM测量结果研究了组合质子能谱，这表明LND可以从月球上的特定位置提供互补的数据集，有助于我们现有的观测结果和对空间环境的理解。我们对脉冲电子事件和弱质子增强进行了速度色散分析，结果表明电子在耀斑爆发后仅22分钟和II型无线电爆发后约15分钟被释放，而质子在电子释放后一小时以上被释放。 。束状原位电子和清晰的速度色散表明源与地球之间的磁连接良好。这是很了不起的，因为立体遥感观测是从...