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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >Anomalous cosmic ray argon and other rare elements at 1-4 MeVucleon trapped within the Earth's magnetosphere
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Anomalous cosmic ray argon and other rare elements at 1-4 MeVucleon trapped within the Earth's magnetosphere

机译：捕获在地球磁层中的1-4 MeV /核子的异常宇宙射线氩和其他稀有元素

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We summarize over 6 years of observations of similar to 1-4 MeVucleon heavy ions trapped in the Earth's magnetosphere on L shells of 1.7-3. We obtained these new results in low Earth orbit with the SAMPEX spacecraft; they extend the observations of trapped heavy ions in this I, range to much lower energies than had previously been examined in detail. At 1-4 MeVucleon we observed a trapped population with a peak intensity near L similar to 2.3 that includes the anomalous cosmic ray species O, Ne, and Ar also observed in interplanetary space at 1 AU. We also found elements with low first ionization potential (C, Mg-S, and Fe) trapped with the same spatial distribution. The low-energy trapped population increased in intensity between 1996 and 1997, roughly during solar minimum and minimum geomagnetic activity. It is possible that the 1-4 MeVucleon trapped population originates from a number of sources, including high-energy trapped anomalous cosmic rays that have lost energy in the residual atmosphere in the case of O and Ne, and directly incident, singly charged anomalous cosmic rays that have become stripped and subsequently trapped in the case of Ar. The group of trapped elements with low first ionization potential (C, Mg-S, and Fe) have roughly solar wind abundances relative to one another, suggesting a possible link between this trapped component and recently discovered solar wind pickup ions released from dust grains within the inner heliosphere. [References: 35]
机译：我们总结了超过6年的观测结果，这些观测结果类似于在1.7-3的L壳层上困在地球磁层中的1-4 MeV /核子重离子。我们使用SAMPEX航天器在低地球轨道上获得了这些新结果;他们扩展了在此I中捕获的重离子的观测范围，使其能量比以前详细研究的要低得多。在1-4 MeV /核子处，我们观察到一个捕获的种群，其峰值强度接近L，类似于2.3，其中还包括在1 AU的行星际空间中观察到的异常宇宙射线物种O，Ne和Ar。我们还发现具有相同空间分布的低第一电离能（C，Mg-S和Fe）元素。在1996年至1997年期间，大约在太阳最低活动和最小地磁活动期间，低能被困人口的强度增加。 1-4 MeV /核子被俘获的种群有可能来自多种来源，包括高能俘获的异常宇宙射线，它们在O和Ne的情况下在残余大气中失去了能量，并直接入射，单电荷在Ar的情况下，异常的宇宙射线已经被剥离并随后被捕获。具有较低的第一电离势（C，Mg-S和Fe）的一组被捕元素相对于彼此具有大致的太阳风丰度，这表明该被捕集的成分与最近发现的从内部灰尘颗粒释放的太阳风吸收离子之间可能存在联系。内太阳圈。 [参考：35]

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