Plasma waves in the distant geomagnetic tail: ISEE 3
Plasma waves in the distant geomagnetic tail: ISEE 3
复制标题
遥远地磁尾中的等离子体波：ISEE 3
DOI：
10.1029/ja095ia12p20977
复制
发表时间：
1990
影响因子：
--
通讯作者：
J. Gosling
中科院分区：
文献类型：
--
作者：
F. Coroniti;E. Greenstadt;B. Tsurutani;E. Smith;R. Zwickl;J. Gosling
在ISEE 3号深穿过地磁尾期间获得的等离子体波测量结果发现，中等到强烈的电场湍流与主要的等离子体和磁场区域以及流动现象有关。在磁层顶边界层中，电场谱幅值通常在316 Hz至562 Hz处出现尖峰。尾瓣区域，这是上游的慢冲击和磁连接到等离子体片的特征在于由波峰在100- 316-Hz的范围内，并在电子等离子体频率的波谱。在等离子体片内，宽带静电噪声发生在磁场强度超过2 nT的区域中;这种噪声也可以在与强场对准的等离子体流相关联的等离子体片边界层中找到。当ISEE 3在不同的遥远的尾部区域之间移动时，等离子体波谱发生了明显但往往微妙的变化。偶尔，等离子体振荡表明遥远的尾巴包含相对密集的冷电子。
The plasma wave measurements obtained during ISEE 3's deep passes through the geomagnetic tail found that moderate to intense electric field turbulence occurred in association with the major plasma and magnetic field regions and flow phenomena. In the magnetopause boundary layer the electric field spectral amplitudes are typically sharply peaked at 316 Hz to 562 Hz. The tail lobe region which is upstream of slow shocks and is magnetically connected to the plasma sheet is characterized by wave spectra that peak in the 100- to 316-Hz range and at the electron plasma frequency. Within the plasma sheet, broadband electrostatic noise occurs in regions where the magnetic field strength exceeds 2 nT; this noise can also be found in the plasma sheet boundary layer in association with strong field-aligned plasma flows. As ISEE 3 moved between the different distant tail regions, distinct but often subtle changes occurred in the plasma wave spectra. Occasionally, plasma oscillations indicate that the distant tail contains a population of relatively dense cold electrons.