A survey of electron cyclotron waves in the magnetosphere and the diffuse auroral electron precipitation
A survey of electron cyclotron waves in the magnetosphere and the diffuse auroral electron precipitation
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DOI：
10.1029/ja094ia03p02529
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发表时间：
1989-03
影响因子：
--
通讯作者：
J. Roeder;H. Koons
中科院分区：
文献类型：
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作者：
J. Roeder;H. Koons
磁层外的自然电子回旋谐波辐射常被认为是导致极光扩散降水的电子散射机制。利用SCATHA和主动磁层粒子示踪探测器（AMPTE）等离子体波仪器的数据，对这些波的特性进行了调查。在0300-0600 LT扇区，在L104 -8和磁纬度±10°范围内观测到的发射最频繁。在该区域，超过35 µV m−1的发射只有25%的时间被检测到，超过12 µV m−1的发射有60%的时间被检测到。与贝尔蒙特等人（1983）的观点一致，这些量完全不足以解释由准线性俯仰角扩散引起的扩散极光电子沉淀。
Natural electron cyclotron harmonic emissions in the outer magnetosphere are often cited as the electron scattering mechanism which results in the diffuse auroral precipitation. A survey is presented of the characteristics of these waves using data from both the SCATHA and Active Magnetospheric Particle Tracer Explorers (AMPTE) IRM plasma wave instruments. The emissions were observed most often in the 0300–0600 LT sector at L ∼ 4–8 and magnetic latitudes in the range ±10°. In this region, emissions exceeding 35 µV m−1 were detected only 25% of the time, and those exceeding 12 µV m−1 were detected 60% of the time. In agreement with Belmont et al. (1983), these amounts are grossly insufficient to account for the diffuse auroral electron precipitation by quasi-linear pitch angle diffusion.