Forecasting the arrival of shock-accelerated solar energetic particles at Earth
Forecasting the arrival of shock-accelerated solar energetic particles at Earth
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DOI：
10.1029/2000ja000216
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发表时间：
2001-10
影响因子：
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通讯作者：
C. Cohen;R. Mewaldt;A. Cummings;R. Leske;E. Stone;P. Slocum;M. Wiedenbeck;E. Christian;T. T. Rosenvinge-T.
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文献类型：
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作者：
C. Cohen;R. Mewaldt;A. Cummings;R. Leske;E. Stone;P. Slocum;M. Wiedenbeck;E. Christian;T. T. Rosenvinge-T.
在行星际冲击中加速的高能粒子可导致宇航员的辐射剂量增加，并增加卫星硬件的风险。已知这些冲击偶尔会将质子加速到大于100 MeV的能量，并可能导致非常高的通量。对强行星际冲击的到来预先发出警报，可以使人们采取措施，尽量减少潜在的风险。为了监测和评估对宇航员的辐射风险，在ACE航天器上的太阳同位素光谱仪（SIS）中安装了两个实时计数率监测器。这些速率测量能量>10和>30 MeV的质子。由于ACE位于L1拉格朗日点，这些速率提供了行星际冲击到达地球前1小时的信息和警告。使用ACE和GOES，数据，我们已经检查了冲击和相关的高能粒子的例子，已经在ACE检测到，后来在地球附近进行了观察，以更充分地发展ACE的预测能力。由于1997-1999年期间太阳活动的数量有限，目前的这项工作主要是一种概念验证。
Energetic particles accelerated at interplanetary shocks can result in an increased radiation dose for astronauts as well as an increased risk to satellite hardware. These shocks are known to occasionally accelerate protons to energies greater than 100 MeV and can result in very high fluxes. Advanced warning of the arrival of strong interplanetary shocks can enable steps to be taken to minimize the potential risks. In an effort to monitor and assess the radiation risk to astronauts, two real-time count rate monitors were implemented in the Solar Isotope Spectrometer (SIS) on the ACE spacecraft. These rates measure protons with energies >10 and >30 MeV. Since ACE is located at the L1 Lagrangian point, these rates provide information and warning up to 1 hour before an interplanetary shock reaches Earth. Using ACE and GOES, data we have examined examples of shocks and associated energetic particles that have been detected at ACE and were later observed near Earth in an effort to develop more fully the forecasting capability of ACE. Because of the limited amount of solar activity during 1997–1999, this current work is primarily a proof of concept.