SEDA-FIB 2017年9月4日至10日观测到的太阳中子
Solar Neutrons Observed from September 4 to 10, 2017 by SEDA-FIB
摘要：
SEDA-FIB是一种用于测量太阳中子的探测器。该太阳中子探测器于2009年7月16日和2018年3月31日在国际空间站上运行。随后，GOES卫星在太阳活动区12673观测到了18个大的太阳耀斑，这些耀斑出现在2017年9月4日，持续到2017年9月10日，强度高于> M2。在其中的九次太阳耀斑中，SEDA-FIB探测到了清晰的太阳中子信号，以及五次轻微的过量。在这些事件中，我们重点关注与X2.2（SOL 2017 -09-06）和X8.2（SOL 2017 -09-10）耀斑相关的两个事件，它们具有共同的功能：FERMI-GBM探测器清楚地记录了将电子加速到高能量的过程。这些事件可以为我们提供有用的信息来阐明离子加速过程。X8.2事件是一个临边耀斑，它被证明足以固定解释粒子加速到高能量过程所需的参数。根据我们的分析，电子加速过程可能用冲击波加速模型来解释。然而，我们发现很难解释离子与电子同时加速的现象，除非离子在快速加速之前被预热。
英文摘要：
The SEDA-FIB is a detector designed to measure solar neutrons. This solar neutron detector was operated onboard the ISS on July 16, 2009 and March 31, 2018. Eighteen large solar flares were later observed by the GOES satellite in solar active region 12673 that appeared on September 4 and lasted until September 10, 2017, with intensity higher than > M2. In nine of those solar flares, the SEDA-FIB detected clear signals of solar neutrons, along with five minor excesses. Among these events, we focus on two associated with the flares of X2.2 (SOL2017-09-06) and X8.2 (SOL2017-09-10) that share a common feature: a process of accelerating electrons into high energies as clearly recorded by the FERMI-GBM detector. These events may provide us with useful information to elucidate the ion acceleration process. The X8.2 event was a limb flare that proved adequate for fixing the parameters needed to explain the process of particle acceleration into high energies. According to our analysis, the electron acceleration process may possibly be explained by the shock acceleration model. However, we found that it would be difficult to explain the simultaneous acceleration of ions with electrons, unless the ions were preheated prior to their rapid acceleration.
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