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DISSIPATION RANGE SPECTRAL CHARACTERISTICS AT 1 AU

机译:1 AU的耗散范围光谱特性

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We have created a data base of over 800 interplanetary magnetic field spectra recorded by the ACE spacecraft. The primary purpose for creating this data base was to study the spectral characteristics of the dissipation range at 1 AU and contrast these observations with the properties of the more familiar inertial range. The data base was constructed to span a wide range of parameter space including magnetic clouds and open field lines with a broad range of bulk plasma parameters (IMF intensity, proton beta, etc.). While we corroborate the earlier results of Leamon et al. [1998a,b; 2000], we also find new results leading to a partial explanation for the form of the dissipation range spectrum. Specifically, we demonstate the the power law index for dissipation range fluctuations is controlled by the rate of energy cascade through the inertial range spectrum. This stands in stark contrast to the established results for Navier-Stokes fluids where the dissipation range possesses a universal form independent of the rate of energy dissipation.
机译:我们已经创建了由ACE航天器记录的超过800季全磁场光谱的数据库。创建该数据库的主要目的是研究1 AU的耗散范围的光谱特性,并将这些观察与更熟悉的惯性范围的性质形成鲜明对比。构建数据库以跨越各种参数空间,包括磁性云和具有广泛的散装等离子体参数(IMF强度,质子Beta等)的开放场线。虽然我们证实了Leamon等人的早期结果。 [1998A,B; 2000],我们还发现新的结果,导致耗散范围谱形式的部分解释。具体地,我们将耗散范围波动的动力法指数通过惯性范围谱来控制耗散范围波动。这与散热范围的普通型流体的成立结果呈现出鲜明对比,其中耗散范围与能量耗散速率无关。

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